遠端 Debian 11 主機上安裝的多個套件受到 dsa-4978 公告中提及的多個弱點影響。

    在 Linux 核心中發現數個弱點，這些弱點可能會導致特權提升、拒絕服務或資訊洩漏。CVE-2020-3702 在 Atheros IEEE 802.11n 晶片組系列 (ath9k) 的驅動程式中發現缺陷，可允許資訊洩漏。CVE-2020-16119 Hadar Manor 報告，Linux 核心的 DCCP 通訊協定實作中存在釋放後使用弱點。本機攻擊者可利用此瑕疵造成拒絕服務，或可能執行任意程式碼。
    CVE-2021-3653 Maxim Levitsky 發現，在 Linux 核心的 AMD 處理器適用的 KVM hypervisor 實作中存在有一個弱點：缺少「int_ctl」VMCB 欄位驗證可讓惡意的 L1 訪客針對 L2 訪客啟用 AVIC 支援 (進階虛擬中斷控制器)。L2 訪客可利用此缺陷，寫入有限但仍相對較大的主機實體記憶體子集。CVE-2021-3656 Maxim Levitsky 和 Paolo Bonzini 發現，Linux 核心之 AMD 處理器的 KVM hypervisor 實作中有一個瑕疵。缺少驗證 `virt_ext` VMCB 欄位，此問題可允許惡意 L1 訪客停用 L2 訪客的 VMLOAD/VMSAVE 攔截和 VLS (虛擬 VMLOAD/VMSAVE)。在這些情況下，L2 來賓可在不遭攔截的情況下執行 VMLOAD/VMSAVE，因此可讀取/寫入主機實體記憶體的部分內容。CVE-2021-3679 Linux 核心追踪模組功能中的一個瑕疵可允許有權限的本機使用者 (具有 CAP_SYS_ADMIN 功能) 造成拒絕服務 (資源耗盡)。CVE-2021-3732 Alois Wohlschlager 報告，在 overlayfs 子系統的實作中存在有一個瑕疵，具有掛載檔案系統權限的本機攻擊者可藉以揭露隱藏在原始掛載中的檔案。CVE-2021-3739 在 btrfs 檔案系統中發現一個 NULL 指標解除參照瑕疵，具有 CAP_SYS_ADMIN 功能的本機攻擊者可藉以造成拒絕服務。
    CVE-2021-3743 在 Qualcomm IPC 路由器通訊協定實作中發現一個超出邊界記憶體讀取問題，可能會進而造成拒絕服務或資訊洩漏。CVE-2021-3753 Minh Yuan 報告 drivers/tty/vt/vt_ioctl.c 中的 vt_k_ioctl 有爭用情形，可能會造成 vt 發生超出邊界讀取。CVE-2021-37576 Alexey Kardashevskiy 報告在 powerpc 平台上的 KVM 子系統中有一個緩衝區溢位問題，其允許 KVM 訪客 OS 使用者造成主機上的記憶體損毀。CVE-2021-38160 在 virtio_console 中發現瑕疵，其可允許未受信任的裝置造成資料損毀或資料遺失。
    CVE-2021-38166 BPF 子系統中的整數溢位瑕疵可允許本機攻擊者造成拒絕服務，或者可能執行任意程式碼。預設情況下，此瑕疵在 Debian 已經減輕，因為已經停用非特權呼叫 bpf()。CVE-2021-38199 Michael Wakabayashi 報告 NFSv4 用戶端實作中有一個瑕疵，其中不正確的連線設定順序允許遠端 NFSv4 伺服器的作業造成拒絕服務。CVE-2021-40490 在寫入 inline_data 檔案同時其 xattrs 變更時，在 ext4 子系統中發現爭用情形。此問題可能導致拒絕服務。CVE-2021-41073 Valentina Palmiotti 在 io_uring 中發現一個瑕疵，允許本機攻擊者提升權限。針對穩定的發行版本 (bullseye)，這些問題已在 5.10.46-5 版本中修正。此更新包含 #993948 和 #993978的修正。建議您升級 linux 套件。如需有關 linux 安全性狀態的詳細資訊，請參閱其安全追蹤頁面：
    https://security-tracker.debian.org/tracker/linux

Tenable 已直接從 Debian 安全公告擷取前置描述區塊。

請注意，Nessus 並未測試這些問題，而是僅依據應用程式自我報告的版本號碼作出判斷。

遠端主機上安裝的核心版本早於 4.14.268-139.500。因此，會受到 ALAS-2022-1571 公告中所提及的多個弱點影響。

  - Linux 核心 4.17 更早版本中的 BPF 子系統未正確處理指令序列的長跳轉，其中內部指令需要大量擴充至多個 BPF 指令，進而導致溢位問題。此問題會影響 kernel/bpf/core.c 和 net/core/filter.c。
    (CVE-2018-25020)

  - 在 Linux 核心 5.10.6 之前版本的 FUSE 檔案系統實作中發現一個問題 (即 CID-5d069dbe8aaf)。fuse_do_getattr() 會在不當情況下呼叫 make_bad_inode()，進而造成系統當機。注意：此弱點的原始修正程式不完整，其不完整性在 CVE-2021-28950 中進行追蹤。(CVE-2020-36322)

  - 在 Linux 核心 5.13.4 之前版本中，fs/nfs/nfs4client.c 中存在 connection-setup 排序錯誤問題。遠端 NFSv4 伺服器操作者可以藉由特殊安排，使應用程式無法在中繼偵測期間存取這些伺服器，進而造成拒絕服務 (掛接無回應)。(CVE-2021-38199)

  - 當使用者觸發惡意 UDF 影像的 udf_file_write_iter 函式時，在 Linux 核心 UDF 檔案系統功能中發現一個 NULL 指標解除參照缺陷。本機使用者可能會利用此缺陷造成系統當機。實際受影響的是 Linux 核心 4.2-rc1 版至 5.17-rc2 版。(CVE-2022-0617)

  - 在 Linux 核心 5.16.5 更早版本中發現一個問題。如果應用程式設定了 O_DIRECTORY 旗標，並嘗試開啟一般檔案，則 nfs_atomic_open() 會執行一般查閱。如果找到一般檔案，ENOTDIR 應該會發生，但伺服器會在檔案描述符號中傳回未初始化的資料。(CVE-2022-24448)

請注意，Nessus 並未測試此問題，而是僅依據應用程式自我報告的版本號碼作出判斷。

遠端 Ubuntu 20.04 LTS 主機上安裝的一個套件受到 USN-5092-1 公告中所提及的多個弱點影響。

  - 在 5.12.13 之前的 Linux 核心的 kernel/bpf/verifier.c 中，分支可能會發生錯誤預測 (例如，因類型混淆所致)，因此無權限的 BPF 程式可透過旁路攻擊讀取任意記憶體位置，即 CID -9183671af6db。(CVE-2021-33624)

  - 在 Linux 核心 5.13.7 版以及之前的所有版本中，無權限的 BPF 程式可透過推測儲存繞過旁路攻擊，從核心記憶體取得敏感資訊，這是因為保護機制會忽略 BPF 堆疊上可能會有未初始化的記憶體位置。(CVE-2021-34556)

  - 在 Linux 核心 5.13.7 版以及之前的所有版本中，無權限的 BPF 程式可透過推測儲存繞過旁路攻擊，從核心記憶體取得敏感資訊，這是因為特定的先佔式儲存區作業不一定會在具有攻擊者控制值的儲存區作業之前發生。
    (CVE-2021-35477)

  - 在 Linux 核心 5.14-rc3 之前版本的追蹤模組功能中，發現使用者追蹤環形緩衝區的特定方式中缺少 CPU 資源。僅取得特權的本機使用者 (藉由 CAP_SYS_ADMIN 功能 ) 可利用此缺陷來耗盡資源，進而引發拒絕服務。
    (CVE-2021-3679)

  - 在 Linux 核心 5.13.4 以及之前的所有版本中，drivers/net/usb/hso.c 中的 hso_free_net_device 未檢查 NETREG_REGISTERED 狀態便呼叫 unregister_netdev，進而造成釋放後使用和雙重釋放。
    (CVE-2021-37159)

  - 在 powerpc 平台上 5.13.5 版之前的 Linux 核心中，arch/powerpc/kvm/book3s_rtas.c 允許 KVM 來賓 OS 使用者透過 rtas_args.nargs 造成主機 OS 記憶體損毀，亦稱 CID-f62f3c20647e。(CVE-2021-37576)

  - 在 Linux 核心 5.13.4 之前版本的 drivers/char/virtio_console.c 中，未受信任的裝置提供超出緩衝區大小的 buf->len 值時可觸發資料損毀或丟失。注意：廠商指出，上述資料損毀在現有的所有使用案例中都不是弱點；新增長度驗證只是為了在主機 OS 行為異常時保持穩健 (CVE-2021-38160)

  - 在 Linux 核心 5.13.4 之前版本中，fs/nfs/nfs4client.c 中存在 connection-setup 排序錯誤問題。遠端 NFSv4 伺服器操作者可以藉由特殊安排，使應用程式無法在中繼偵測期間存取這些伺服器，進而造成拒絕服務 (掛接無回應)。(CVE-2021-38199)

  - 在 5.13.4 版之前的 Linux 核心中，net/sunrpc/xdr.c 允許遠端攻擊者透過執行多項 NFS 4.2 READ_PLUS 作業，引致拒絕服務 (xdr_set_page_base slab-out-of-bounds 存取 )。
    (CVE-2021-38201)

  - 在 Linux 核心 5.13.6 之前版本中，drivers/usb/host/max3421-hcd.c 允許鄰近攻擊者藉由在某些情況下移除 MAX-3421 USB 設備來造成拒絕服務 (釋放後使用和損壞)。(CVE-2021-38204)

  - 在 Linux 核心 5.13.3 之前版本中，drivers/net/ethernet/xilinx/xilinx_emaclite.c 會列印核心指標 (即真正的 IOMEM 指標)，這讓攻擊者更容易破解 ASLR 保護機制。(CVE-2021-38205)

  - 在 Linux 核心 5.10 至 5.14.6 版中，fs/io_uring.c 中的 loop_rw_iter 允許本機使用者使用 IORING_OP_PROVIDE_BUFFERS 來取得權限，進而觸發核心緩衝區釋放，在攻擊中使用 /proc/<pid>/maps 即為一例。(CVE-2021-41073)

請注意，Nessus 並未測試這些問題，而是僅依據應用程式自我報告的版本號碼作出判斷。

遠端 Debian 9 主機上安裝的套件受 dla-2843 公告中提及的多個弱點影響。

  - Linux 核心中存在可遭本機攻擊者惡意利用的釋放後使用弱點，這是因為附加 dccps_hc_tx_ccid 物件的 DCCP 通訊端在釋放後作為接聽程式進行重複使用所致。此弱點已在 Ubuntu Linux 核心 5.4.0-51.56、 5.3.0-68.63、 4.15.0-121.123、 4.4.0-193.224、 3.13.0.182.191 和 3.2.0-149.196 中修正。
    (CVE-2020-16119)

  - 未明確時間和特製的流量可造成 WLAN 裝置發生內部錯誤，導致第 2 層 Wi-Fi 加密不當，進而可能因 Snapdragon Auto、Snapdragon Compute、Snapdragon Connectivity、Snapdragon Consumer IOT、Snapdragon Industrial IOT、Snapdragon Mobile、Snapdragon Voice & Music、Snapdragon Wearables、Snapdragon Wired Infrastructure 和網路中 APQ8053、IPQ4019、IPQ8064 MSM8909W、MSM8996AU、QCA9531、QCN5502、QCS405、SDX20SM6150、SM7150 中的離散流量設定而造成資訊洩漏 (CVE-2020-3702)

  - 在 af_unix.c 的 unix_scm_to_skb 中，可能由於爭用情形導致釋放後使用錯誤。這可能會導致需要系統執行權限的本機權限提升。不需使用者互動即可惡意利用。產品：AndroidVersions：Android 核心 Android ID：A-196926917 參照：
    上游核心 (CVE-2021-0920)

  - 在 Linux 核心中發現一個缺陷。損壞的計時器樹導致 lib/timerqueue.c 中的 timerqueue_add 函數中缺少工作喚醒。此缺陷允許具有特殊使用者權限的本機攻擊者造成拒絕服務的狀況，進而在執行 OSP 時減慢並最終停止系統。
    (CVE-2021-20317)

  - 在 Linux:KVM 中發現一個問題，這是由於對 KVM 中的 VM_IO|VM_PFNMAP vmas 處理不當造成。此問題可造成使用者繞過 RO 檢查，並導致頁面在 VMM 和來賓仍可存取時遭到釋放。這讓能夠啟動和控制 VM 的使用者可以讀取/寫入隨機的記憶體頁面，並可能導致本機權限提升。(CVE-2021-22543)

  - 在 Linux 核心 5.9-rc1 之前版本的搖桿裝置子系統中，在使用者呼叫 ioctl JSIOCSBTNMAP 的方式中發現超出邊界寫入記憶體缺陷。 本機使用者可利用此缺陷造成系統當機，或可能提升自己的系統權限。此弱點對於機密性、完整性以及系統可用性的威脅最大。(CVE-2021-3612)

  - 在 KVM 中用於支援 SVM 巢狀虛擬化的 AMD 程式碼中發現一個瑕疵。處理 L1 來賓提供的用以衍生/處理巢狀來賓 (L2) 的 VMCB (虛擬機器控制區塊) 時，會觸發此瑕疵。由於 int_ctl 欄位驗證不當，此問題可允許惡意 L1 針對 L2 來賓啟用 AVIC 支援 (進階虛擬中斷控制器)。因此，L2 來賓可以讀取/寫入主機的實體頁面，進而導致整個系統當機、敏感資料遭到洩漏，或可能造成從來賓逸出至主機。此缺陷會影響 5.14-rc7 之前的 Linux 核心版本。(CVE-2021-3653)

  - 在 Linux 核心 v5.14-rc1 之前版本中發現一個缺陷。缺少對傳入 SCTP 封包的大小驗證，可能允許核心讀取未初始化的記憶體。(CVE-2021-3655)

  - 在 Linux 核心 5.14-rc3 之前版本的追蹤模組功能中，發現使用者追蹤環形緩衝區的特定方式中缺少 CPU 資源。僅取得特權的本機使用者 (藉由 CAP_SYS_ADMIN 功能 ) 可利用此缺陷來耗盡資源，進而引發拒絕服務。
    (CVE-2021-3679)

  - 在 Linux 核心 5.13.4 以及之前的所有版本中，drivers/net/usb/hso.c 中的 hso_free_net_device 未檢查 NETREG_REGISTERED 狀態便呼叫 unregister_netdev，進而造成釋放後使用和雙重釋放。
    (CVE-2021-37159)

  - **有爭議** 在 Linux 核心 5.13.4 之前版本的 drivers/char/virtio_console.c 中，未受信任的裝置提供超出緩衝區大小的 buf->len 值時可觸發資料損毀或丟失。 注意：
    廠商指出，上述資料損毀在現有的所有使用案例中都不是弱點；新增長度驗證只是為了在主機 OS 行為異常時保持穩健。
    (CVE-2021-38160)

  - 在 5.12.11 版之前的 Linux 核心中，arch/x86/kvm/mmu/paging_tmpl.h 不會正確計算陰影頁面的存取權限，進而導致遺漏來賓保護頁面錯誤。(CVE-2021-38198)

  - 在 Linux 核心 5.13.4 之前版本中，fs/nfs/nfs4client.c 中存在 connection-setup 排序錯誤問題。遠端 NFSv4 伺服器操作者可以藉由特殊安排，使應用程式無法在中繼偵測期間存取這些伺服器，進而造成拒絕服務 (掛接無回應)。(CVE-2021-38199)

  - inflect 容易受到低效規則運算式複雜性的影響 (CVE-2021-3820)

  - 在 Linux 核心 5.13.6 之前版本中，drivers/usb/host/max3421-hcd.c 允許鄰近攻擊者藉由在某些情況下移除 MAX-3421 USB 設備來造成拒絕服務 (釋放後使用和損壞)。(CVE-2021-38204)

  - 在 Linux 核心 5.13.3 之前版本中，drivers/net/ethernet/xilinx/xilinx_emaclite.c 會列印核心指標 (即真正的 IOMEM 指標)，這讓攻擊者更容易破解 ASLR 保護機制。(CVE-2021-38205)

  - 在 Linux 核心 5.13.13 以及之前的所有版本中， 在 ext4 子系統中 fs/ext4/inline.c 的 ext4_write_inline_data_end 中發現爭用情形。(CVE-2021-40490)

  - 在 5.14.9 及之前版本的 Linux 核心中，kernel/bpf/stackmap.c 中的 prealloc_elems_and_freelist 允許無權限使用者觸發 eBPF 乘法整數溢出，進而導致超出邊界寫入問題。(CVE-2021-41864)

  - 在 5.13.13 之前版本的 Linux 核心中，drivers/net/hamradio/6pack.c 的 decode_data 函式中存在一個 slab 超出邊界寫入問題。來自具有 CAP_NET_ADMIN 功能的處理程序的輸入可導致存取 root。
    (CVE-2021-42008)

  - Linux 核心 5.14.13 及之前版本的 firewire 子系統中存在一個與 drivers/media/firewire/firedtv-avc.c 和 drivers/media/firewire/firedtv-ci.c 相關的緩衝區溢位，而這是由於 avc_ca_pmt 未正確處理邊界檢查所致。(CVE-2021-42739)

  - 在 5.14.15 版之前的 Linux 核心中發現一個問題。drivers/isdn/capi/kcapi.c 的 detach_capi_ctr 函式中存在一個 array-index-out-of-bounds 缺陷。(CVE-2021-43389)

請注意，Nessus 並未測試此問題，而是僅依據應用程式自我報告的版本號碼。

The version of kernel installed on the remote host is prior to 5.4.141-67.229. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2KERNEL-5.4-2022-006 advisory.

    A flaw was found in the Linux kernel. This flaw allows attackers to cause a denial of service (soft     lockup) by triggering the destruction of a large SEV VM, which requires unregistering many encrypted     regions. The highest threat from this vulnerability is to system availability. (CVE-2020-36311)

    In kernel/bpf/verifier.c in the Linux kernel before 5.12.13, a branch can be mispredicted (e.g., because     of type confusion) and consequently an unprivileged BPF program can read arbitrary memory locations via a     side-channel attack, aka CID-9183671af6db. (CVE-2021-33624)

    A flaw in the Linux kernel allows a privileged BPF program to obtain sensitive information from kernel     memory via a Speculative Store Bypass side-channel in the eBPF subsystem (CVE-2021-35477)

    A vulnerability was found in the Linux kernel. Missing size validations on inbound SCTP packets may allow     the kernel to read uninitialized memory. (CVE-2021-3655)

    A lack of CPU resources in the Linux kernel tracing module functionality was found in the way users use     the trace ring buffer in specific way. Only privileged local users (with CAP_SYS_ADMIN capability) could     use this flaw to starve the resources causing denial of service. (CVE-2021-3679)

    ** DISPUTED ** In drivers/char/virtio_console.c in the Linux kernel before 5.13.4, data corruption or loss     can be triggered by an untrusted device that supplies a buf->len value exceeding the buffer size. NOTE:
    the vendor indicates that the cited data corruption is not a vulnerability in any existing use case; the     length validation was added solely for robustness in the face of anomalous host OS behavior.
    (CVE-2021-38160)

    A flaw was found in the Linux kernel, where it incorrectly computes the access permissions of a shadow     page. This issue leads to a missing guest protection page fault. (CVE-2021-38198)

    A flaw was found in the hanging of mounts in the Linux kernel's NFS4 subsystem where remote servers are     unreachable for the client during migration of data from one server to another (during trunking     detection). This flaw allows a remote NFS4 server (if the client is connected) to starve the resources,     causing a denial of service. The highest threat from this vulnerability is to system availability.
    (CVE-2021-38199)

    In the Linux kernel, the following vulnerability has been resolved:

    ACPI: fix NULL pointer dereference (CVE-2021-47289)

    In the Linux kernel, the following vulnerability has been resolved:

    ipv6: fix another slab-out-of-bounds in fib6_nh_flush_exceptions (CVE-2021-47291)

    In the Linux kernel, the following vulnerability has been resolved:

    net: sched: fix memory leak in tcindex_partial_destroy_work (CVE-2021-47295)

    In the Linux kernel, the following vulnerability has been resolved:

    igb: Fix use-after-free error during reset (CVE-2021-47301)

    In the Linux kernel, the following vulnerability has been resolved:

    dma-buf/sync_file: Don't leak fences on merge failure (CVE-2021-47305)

    In the Linux kernel, the following vulnerability has been resolved:

    cifs: prevent NULL deref in cifs_compose_mount_options() (CVE-2021-47307)

    In the Linux kernel, the following vulnerability has been resolved:

    scsi: libfc: Fix array index out of bound exception (CVE-2021-47308)

    In the Linux kernel, the following vulnerability has been resolved:

    net: validate lwtstate->data before returning from skb_tunnel_info() (CVE-2021-47309)

    In the Linux kernel, the following vulnerability has been resolved:

    net: qcom/emac: fix UAF in emac_remove (CVE-2021-47311)

    In the Linux kernel, the following vulnerability has been resolved:

    virtio-blk: Fix memory leak among suspend/resume procedure (CVE-2021-47319)

    In the Linux kernel, the following vulnerability has been resolved:

    nfs: fix acl memory leak of posix_acl_create() (CVE-2021-47320)

    In the Linux kernel, the following vulnerability has been resolved:

    iommu/arm-smmu: Fix arm_smmu_device refcount leak in address translation (CVE-2021-47325)

    In the Linux kernel, the following vulnerability has been resolved:

    iommu/arm-smmu: Fix arm_smmu_device refcount leak when arm_smmu_rpm_get fails (CVE-2021-47327)

    In the Linux kernel, the following vulnerability has been resolved:

    scsi: iscsi: Fix conn use after free during resets (CVE-2021-47328)

    In the Linux kernel, the following vulnerability has been resolved:

    scsi: megaraid_sas: Fix resource leak in case of probe failure (CVE-2021-47329)

    In the Linux kernel, the following vulnerability has been resolved:

    fbmem: Do not delete the mode that is still in use (CVE-2021-47338)

    In the Linux kernel, the following vulnerability has been resolved:

    jfs: fix GPF in diFree (CVE-2021-47340)

    In the Linux kernel, the following vulnerability has been resolved:

    KVM: mmio: Fix use-after-free Read in kvm_vm_ioctl_unregister_coalesced_mmio (CVE-2021-47341)

    In the Linux kernel, the following vulnerability has been resolved:

    dm btree remove: assign new_root only when removal succeeds (CVE-2021-47343)

    In the Linux kernel, the following vulnerability has been resolved:

    RDMA/cma: Fix rdma_resolve_route() memory leak (CVE-2021-47345)

    In the Linux kernel, the following vulnerability has been resolved:

    udf: Fix NULL pointer dereference in udf_symlink function (CVE-2021-47353)

    In the Linux kernel, the following vulnerability has been resolved:

    drm/sched: Avoid data corruptions (CVE-2021-47354)

    An issue was discovered in the Linux kernel before 5.13.3. lib/seq_buf.c has a seq_buf_putmem_hex buffer     overflow. (CVE-2023-28772)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Ubuntu 20.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-5096-1 advisory.

    Valentina Palmiotti discovered that the io_uring subsystem in the Linux kernel could be coerced to free     adjacent memory. A local attacker could use this to execute arbitrary code. (CVE-2021-41073)

    Benedict Schlueter discovered that the BPF subsystem in the Linux kernel did not properly protect against     Speculative Store Bypass (SSB) side- channel attacks in some situations. A local attacker could possibly     use this to expose sensitive information. (CVE-2021-34556)

    Piotr Krysiuk discovered that the BPF subsystem in the Linux kernel did not properly protect against     Speculative Store Bypass (SSB) side-channel attacks in some situations. A local attacker could possibly     use this to expose sensitive information. (CVE-2021-35477)

    Murray McAllister discovered that the joystick device interface in the Linux kernel did not properly     validate data passed via an ioctl(). A local attacker could use this to cause a denial of service (system     crash) or possibly execute arbitrary code on systems with a joystick device registered. (CVE-2021-3612)

    It was discovered that the tracing subsystem in the Linux kernel did not properly keep track of per-cpu     ring buffer state. A privileged attacker could use this to cause a denial of service. (CVE-2021-3679)

    It was discovered that the Option USB High Speed Mobile device driver in the Linux kernel did not properly     handle error conditions. A physically proximate attacker could use this to cause a denial of service     (system crash) or possibly execute arbitrary code. (CVE-2021-37159)

    Alois Wohlschlager discovered that the overlay file system in the Linux kernel did not restrict private     clones in some situations. An attacker could use this to expose sensitive information. (CVE-2021-3732)

    It was discovered that the Virtio console implementation in the Linux kernel did not properly validate     input lengths in some situations. A local attacker could possibly use this to cause a denial of service     (system crash). (CVE-2021-38160)

    It was discovered that the BPF subsystem in the Linux kernel contained an integer overflow in its hash     table implementation. A local attacker could use this to cause a denial of service (system crash) or     possibly execute arbitrary code. (CVE-2021-38166)

    Michael Wakabayashi discovered that the NFSv4 client implementation in the Linux kernel did not properly     order connection setup operations. An attacker controlling a remote NFS server could use this to cause a     denial of service on the client. (CVE-2021-38199)

    It was discovered that the Sun RPC implementation in the Linux kernel contained an out-of-bounds access     error. A remote attacker could possibly use this to cause a denial of service (system crash).
    (CVE-2021-38201)

    It was discovered that the NFS server implementation in the Linux kernel contained an out-of-bounds read     when the trace even framework is being used for nfsd. A remote attacker could possibly use this to cause a     denial of service (system crash). (CVE-2021-38202)

    Naohiro Aota discovered that the btrfs file system in the Linux kernel contained a race condition in     situations that triggered allocations of new system chunks. A local attacker could possibly use this to     cause a denial of service (deadlock). (CVE-2021-38203)

    It was discovered that the MAX-3421 host USB device driver in the Linux kernel did not properly handle     device removal events. A physically proximate attacker could use this to cause a denial of service (system     crash). (CVE-2021-38204)

    It was discovered that the Xilinx 10/100 Ethernet Lite device driver in the Linux kernel could report     pointer addresses in some situations. An attacker could use this information to ease the exploitation of     another vulnerability. (CVE-2021-38205)

    It was discovered that the ext4 file system in the Linux kernel contained a race condition when writing     xattrs to an inode. A local attacker could use this to cause a denial of service or possibly gain     administrative privileges. (CVE-2021-40490)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

According to the versions of the kernel packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  - In the Linux kernel through 5.13.7, an unprivileged BPF program can obtain sensitive information from     kernel memory via a Speculative Store Bypass side-channel attack because the protection mechanism neglects     the possibility of uninitialized memory locations on the BPF stack. (CVE-2021-34556)

  - In the Linux kernel through 5.13.7, an unprivileged BPF program can obtain sensitive information from     kernel memory via a Speculative Store Bypass side-channel attack because a certain preempting store     operation does not necessarily occur before a store operation that has an attacker-controlled value.
    (CVE-2021-35477)

  - A vulnerability was found in the Linux kernel in versions prior to v5.14-rc1. Missing size validations on     inbound SCTP packets may allow the kernel to read uninitialized memory. (CVE-2021-3655)

  - A lack of CPU resource in the Linux kernel tracing module functionality in versions prior to 5.14-rc3 was     found in the way user uses trace ring buffer in a specific way. Only privileged local users (with     CAP_SYS_ADMIN capability) could use this flaw to starve the resources causing denial of service.
    (CVE-2021-3679)

  - hso_free_net_device in drivers/net/usb/hso.c in the Linux kernel through 5.13.4 calls unregister_netdev     without checking for the NETREG_REGISTERED state, leading to a use-after-free and a double free.
    (CVE-2021-37159)

  - ** DISPUTED ** In drivers/char/virtio_console.c in the Linux kernel before 5.13.4, data corruption or loss     can be triggered by an untrusted device that supplies a buf->len value exceeding the buffer size. NOTE:
    the vendor indicates that the cited data corruption is not a vulnerability in any existing use case; the     length validation was added solely for robustness in the face of anomalous host OS behavior.
    (CVE-2021-38160)

  - fs/nfs/nfs4client.c in the Linux kernel before 5.13.4 has incorrect connection-setup ordering, which     allows operators of remote NFSv4 servers to cause a denial of service (hanging of mounts) by arranging for     those servers to be unreachable during trunking detection. (CVE-2021-38199)

  - drivers/net/ethernet/xilinx/xilinx_emaclite.c in the Linux kernel before 5.13.3 makes it easier for     attackers to defeat an ASLR protection mechanism because it prints a kernel pointer (i.e., the real IOMEM     pointer). (CVE-2021-38205)

  - drivers/net/ethernet/xilinx/ll_temac_main.c in the Linux kernel before 5.12.13 allows remote attackers to     cause a denial of service (buffer overflow and lockup) by sending heavy network traffic for about ten     minutes. (CVE-2021-38207)

  - net/nfc/llcp_sock.c in the Linux kernel before 5.12.10 allows local unprivileged users to cause a denial     of service (NULL pointer dereference and BUG) by making a getsockname call after a certain type of failure     of a bind call. (CVE-2021-38208)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

According to the versions of the kernel packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  - An information disclosure vulnerability exists in the ARM SIGPAGE functionality of Linux Kernel v5.4.66     and v5.4.54. The latest version (5.11-rc4) seems to still be vulnerable. A userland application can read     the contents of the sigpage, which can leak kernel memory contents. An attacker can read a process's     memory at a specific offset to trigger this vulnerability. This was fixed in kernel releases: 4.14.222     4.19.177 5.4.99 5.10.17 5.11 (CVE-2021-21781)

  - A lack of CPU resource in the Linux kernel tracing module functionality in versions prior to 5.14-rc3 was     found in the way user uses trace ring buffer in a specific way. Only privileged local users (with     CAP_SYS_ADMIN capability) could use this flaw to starve the resources causing denial of service.
    (CVE-2021-3679)

  - hso_free_net_device in drivers/net/usb/hso.c in the Linux kernel through 5.13.4 calls unregister_netdev     without checking for the NETREG_REGISTERED state, leading to a use-after-free and a double free.
    (CVE-2021-37159)

  - fs/nfs/nfs4client.c in the Linux kernel before 5.13.4 has incorrect connection-setup ordering, which     allows operators of remote NFSv4 servers to cause a denial of service (hanging of mounts) by arranging for     those servers to be unreachable during trunking detection. (CVE-2021-38199)

  - A race condition was discovered in ext4_write_inline_data_end in fs/ext4/inline.c in the ext4 subsystem in     the Linux kernel through 5.13.13. (CVE-2021-40490)

  - The decode_data function in drivers/net/hamradio/6pack.c in the Linux kernel before 5.13.13 has a slab     out-of-bounds write. Input from a process that has the CAP_NET_ADMIN capability can lead to root access.
    (CVE-2021-42008)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The remote Ubuntu 20.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-5120-1 advisory.

    It was discovered that the f2fs file system in the Linux kernel did not properly validate metadata in some     situations. An attacker could use this to construct a malicious f2fs image that, when mounted and operated     on, could cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2019-19449)

    It was discovered that the Linux kernel did not properly enforce certain types of entries in the Secure     Boot Forbidden Signature Database (aka dbx) protection mechanism. An attacker could use this to bypass     UEFI Secure Boot restrictions. (CVE-2020-26541)

    It was discovered that the KVM hypervisor implementation for AMD processors in the Linux kernel did not     ensure enough processing time was given to perform cleanups of large SEV VMs. A local attacker could use     this to cause a denial of service (soft lockup). (CVE-2020-36311)

    It was discovered that the KVM hypervisor implementation in the Linux kernel did not properly perform     reference counting in some situations, leading to a use-after-free vulnerability. An attacker who could     start and control a VM could possibly use this to expose sensitive information or execute arbitrary code.
    (CVE-2021-22543)

    Murray McAllister discovered that the joystick device interface in the Linux kernel did not properly     validate data passed via an ioctl(). A local attacker could use this to cause a denial of service (system     crash) or possibly execute arbitrary code on systems with a joystick device registered. (CVE-2021-3612)

    It was discovered that the Linux kernel did not properly account for the memory usage of certain IPC     objects. A local attacker could use this to cause a denial of service (memory exhaustion). (CVE-2021-3759)

    Michael Wakabayashi discovered that the NFSv4 client implementation in the Linux kernel did not properly     order connection setup operations. An attacker controlling a remote NFS server could use this to cause a     denial of service on the client. (CVE-2021-38199)

    It was discovered that the Xilinx LL TEMAC device driver in the Linux kernel did not properly calculate     the number of buffers to be used in certain situations. A remote attacker could use this to cause a denial     of service (system crash). (CVE-2021-38207)

    It was discovered that the ext4 file system in the Linux kernel contained a race condition when writing     xattrs to an inode. A local attacker could use this to cause a denial of service or possibly gain     administrative privileges. (CVE-2021-40490)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Ubuntu 20.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-5106-1 advisory.

    Valentina Palmiotti discovered that the io_uring subsystem in the Linux kernel could be coerced to free     adjacent memory. A local attacker could use this to execute arbitrary code. (CVE-2021-41073)

    It was discovered that the Linux kernel did not properly enforce certain types of entries in the Secure     Boot Forbidden Signature Database (aka dbx) protection mechanism. An attacker could use this to bypass     UEFI Secure Boot restrictions. (CVE-2020-26541)

    It was discovered that the KVM hypervisor implementation in the Linux kernel did not properly perform     reference counting in some situations, leading to a use-after-free vulnerability. An attacker who could     start and control a VM could possibly use this to expose sensitive information or execute arbitrary code.
    (CVE-2021-22543)

    Murray McAllister discovered that the joystick device interface in the Linux kernel did not properly     validate data passed via an ioctl(). A local attacker could use this to cause a denial of service (system     crash) or possibly execute arbitrary code on systems with a joystick device registered. (CVE-2021-3612)

    It was discovered that the Virtio console implementation in the Linux kernel did not properly validate     input lengths in some situations. A local attacker could possibly use this to cause a denial of service     (system crash). (CVE-2021-38160)

    Michael Wakabayashi discovered that the NFSv4 client implementation in the Linux kernel did not properly     order connection setup operations. An attacker controlling a remote NFS server could use this to cause a     denial of service on the client. (CVE-2021-38199)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The version of kernel installed on the remote host is prior to 4.14.268-205.500. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2-2022-1761 advisory.

    2024-12-05: CVE-2022-48757 was added to this advisory.

    2024-12-05: CVE-2022-48786 was added to this advisory.

    2024-12-05: CVE-2022-48799 was added to this advisory.

    2024-08-14: CVE-2022-48804 was added to this advisory.

    2024-08-14: CVE-2022-48805 was added to this advisory.

    2024-08-14: CVE-2022-48809 was added to this advisory.

    2024-08-01: CVE-2022-48742 was added to this advisory.

    2024-08-01: CVE-2022-48711 was added to this advisory.

    2024-08-01: CVE-2022-48760 was added to this advisory.

    2024-08-01: CVE-2022-48724 was added to this advisory.

    2024-08-01: CVE-2022-48743 was added to this advisory.

    2024-08-01: CVE-2021-47620 was added to this advisory.

    A buffer overflow flaw in the Linux kernel BPF subsystem was found in the way users run BPF with long jump     over an instruction sequence where inner instructions require substantial expansions into multiple BPF     instructions. A local user could use this flaw to crash the system or escalate their privileges on the     system. (CVE-2018-25020)

    A denial of service flaw was found in fuse_do_getattr in fs/fuse/dir.c in the kernel side of the FUSE     filesystem in the Linux kernel. A local user could use this flaw to crash the system. (CVE-2020-36322)

    AMD recommends using a software mitigation for this issue, which the kernel is enabling by default. The     Linux kernel will use the generic retpoline software mitigation, instead of the specialized AMD one, on     AMD instances (*5a*). This is done by default, and no administrator action is needed. (CVE-2021-26341)

    AMD recommends using a software mitigation for this issue, which the kernel is enabling by default. The     Linux kernel will use the generic retpoline software mitigation, instead of the specialized AMD one, on     AMD instances (*5a*). This is done by default, and no administrator action is needed. (CVE-2021-26401)

    A flaw was found in the hanging of mounts in the Linux kernel's NFS4 subsystem where remote servers are     unreachable for the client during migration of data from one server to another (during trunking     detection). This flaw allows a remote NFS4 server (if the client is connected) to starve the resources,     causing a denial of service. The highest threat from this vulnerability is to system availability.
    (CVE-2021-38199)

    An unprivileged write to the file handler flaw in the Linux kernel's control groups and namespaces     subsystem was found in the way users have access to some less privileged process that are controlled by     cgroups and have higher privileged parent process. It is actually both for cgroup2 and cgroup1 versions of     control groups. A local user could use this flaw to crash the system or escalate their privileges on the     system. (CVE-2021-4197)

    In the Linux kernel, the following vulnerability has been resolved:

    Bluetooth: refactor malicious adv data check (CVE-2021-47620)

    Non-transparent sharing of branch predictor selectors between contexts in some Intel(R) Processors may     allow an authorized user to potentially enable information disclosure. (CVE-2022-0001)

    Non-transparent sharing of branch predictor within a context in some Intel(r) Processors may allow an     authorized user to potentially enable information disclosure via local access. (CVE-2022-0002)

    A random memory access flaw was found in the Linux kernel's GPU i915 kernel driver functionality in the     way a user may run malicious code on the GPU. This flaw allows a local user to crash the system or     escalate their privileges on the system. (CVE-2022-0330)

    A stack overflow flaw was found in the Linux kernel's TIPC protocol functionality in the way a user sends     a packet with malicious content where the number of domain member nodes is higher than the 64 allowed.
    This flaw allows a remote user to crash the system or possibly escalate their privileges if they have     access to the TIPC network. (CVE-2022-0435)

    A NULL pointer dereference was found in the Linux kernel's UDF file system functionality in the way the     user triggers the udf_file_write_iter function for a malicious UDF image. This flaw allows a local user to     crash the system. (CVE-2022-0617)

    The Amazon Linux kernel now enables, by default, a software mitigation for this issue, on all ARM-based     EC2 instance types. (CVE-2022-23960)

    A flaw was found in the Linux kernel. When an application tries to open a directory (using the O_DIRECTORY     flag) in a mounted NFS filesystem, a lookup operation is performed. If the NFS server returns a file as a     result of the lookup, the NFS filesystem returns an uninitialized file descriptor instead of the expected     ENOTDIR value. This flaw leads to the kernel's data leak into the userspace. (CVE-2022-24448)

    In the Linux kernel, the following vulnerability has been resolved:

    tipc: improve size validations for received domain records (CVE-2022-48711)

    In the Linux kernel, the following vulnerability has been resolved:

    iommu/vt-d: Fix potential memory leak in intel_setup_irq_remapping() (CVE-2022-48724)

    In the Linux kernel, the following vulnerability has been resolved:

    rtnetlink: make sure to refresh master_dev/m_ops in __rtnl_newlink() (CVE-2022-48742)

    In the Linux kernel, the following vulnerability has been resolved:

    net: amd-xgbe: Fix skb data length underflow (CVE-2022-48743)

    In the Linux kernel, the following vulnerability has been resolved:

    net: fix information leakage in /proc/net/ptype (CVE-2022-48757)

    In the Linux kernel, the following vulnerability has been resolved:

    USB: core: Fix hang in usb_kill_urb by adding memory barriers (CVE-2022-48760)

    In the Linux kernel, the following vulnerability has been resolved:

    vsock: remove vsock from connected table when connect is interrupted by a signal (CVE-2022-48786)

    In the Linux kernel, the following vulnerability has been resolved:

    perf: Fix list corruption in perf_cgroup_switch() (CVE-2022-48799)

    In the Linux kernel, the following vulnerability has been resolved:

    vt_ioctl: fix array_index_nospec in vt_setactivate (CVE-2022-48804)

    In the Linux kernel, the following vulnerability has been resolved:

    net: usb: ax88179_178a: Fix out-of-bounds accesses in RX fixup (CVE-2022-48805)

    In the Linux kernel, the following vulnerability has been resolved:

    net: fix a memleak when uncloning an skb dst and its metadata (CVE-2022-48809)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

According to the versions of the kernel packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  - ** DISPUTED ** In drivers/char/virtio_console.c in the Linux kernel before 5.13.4, data corruption or loss     can be triggered by an untrusted device that supplies a buf->len value exceeding the buffer size. NOTE:
    the vendor indicates that the cited data corruption is not a vulnerability in any existing use case; the     length validation was added solely for robustness in the face of anomalous host OS behavior.
    (CVE-2021-38160)

  - A lack of CPU resource in the Linux kernel tracing module functionality in versions prior to 5.14-rc3 was     found in the way user uses trace ring buffer in a specific way. Only privileged local users (with     CAP_SYS_ADMIN capability) could use this flaw to starve the resources causing denial of service.
    (CVE-2021-3679)

  - A race problem was seen in the vt_k_ioctl in drivers/tty/vt/vt_ioctl.c in the Linux kernel, which may     cause an out of bounds read in vt as the write access to vc_mode is not protected by lock-in vt_ioctl     (KDSETMDE). The highest threat from this vulnerability is to data confidentiality. (CVE-2021-3753)

  - hso_free_net_device in drivers/net/usb/hso.c in the Linux kernel through 5.13.4 calls unregister_netdev     without checking for the NETREG_REGISTERED state, leading to a use-after-free and a double free.
    (CVE-2021-37159)

  - fs/nfs/nfs4client.c in the Linux kernel before 5.13.4 has incorrect connection-setup ordering, which     allows operators of remote NFSv4 servers to cause a denial of service (hanging of mounts) by arranging for     those servers to be unreachable during trunking detection. (CVE-2021-38199)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

According to the versions of the kernel packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  - In the Linux kernel through 5.13.7, an unprivileged BPF program can obtain sensitive information from     kernel memory via a Speculative Store Bypass side-channel attack because the protection mechanism neglects     the possibility of uninitialized memory locations on the BPF stack. (CVE-2021-34556)

  - In the Linux kernel through 5.13.7, an unprivileged BPF program can obtain sensitive information from     kernel memory via a Speculative Store Bypass side-channel attack because a certain preempting store     operation does not necessarily occur before a store operation that has an attacker-controlled value.
    (CVE-2021-35477)

  - A flaw was found in the KVM's AMD code for supporting SVM nested virtualization. The flaw occurs when     processing the VMCB (virtual machine control block) provided by the L1 guest to spawn/handle a nested     guest (L2). Due to improper validation of the 'int_ctl' field, this issue could allow a malicious L1 to     enable AVIC support (Advanced Virtual Interrupt Controller) for the L2 guest. As a result, the L2 guest     would be allowed to read/write physical pages of the host, resulting in a crash of the entire system, leak     of sensitive data or potential guest-to-host escape. This flaw affects Linux kernel versions prior to     5.14-rc7. (CVE-2021-3653)

  - A vulnerability was found in the Linux kernel in versions prior to v5.14-rc1. Missing size validations on     inbound SCTP packets may allow the kernel to read uninitialized memory. (CVE-2021-3655)

  - A lack of CPU resource in the Linux kernel tracing module functionality in versions prior to 5.14-rc3 was     found in the way user uses trace ring buffer in a specific way. Only privileged local users (with     CAP_SYS_ADMIN capability) could use this flaw to starve the resources causing denial of service.
    (CVE-2021-3679)

  - hso_free_net_device in drivers/net/usb/hso.c in the Linux kernel through 5.13.4 calls unregister_netdev     without checking for the NETREG_REGISTERED state, leading to a use-after-free and a double free.
    (CVE-2021-37159)

  - ** DISPUTED ** In drivers/char/virtio_console.c in the Linux kernel before 5.13.4, data corruption or loss     can be triggered by an untrusted device that supplies a buf->len value exceeding the buffer size. NOTE:
    the vendor indicates that the cited data corruption is not a vulnerability in any existing use case; the     length validation was added solely for robustness in the face of anomalous host OS behavior.
    (CVE-2021-38160)

  - arch/x86/kvm/mmu/paging_tmpl.h in the Linux kernel before 5.12.11 incorrectly computes the access     permissions of a shadow page, leading to a missing guest protection page fault. (CVE-2021-38198)

  - fs/nfs/nfs4client.c in the Linux kernel before 5.13.4 has incorrect connection-setup ordering, which     allows operators of remote NFSv4 servers to cause a denial of service (hanging of mounts) by arranging for     those servers to be unreachable during trunking detection. (CVE-2021-38199)

  - drivers/net/ethernet/xilinx/xilinx_emaclite.c in the Linux kernel before 5.13.3 makes it easier for     attackers to defeat an ASLR protection mechanism because it prints a kernel pointer (i.e., the real IOMEM     pointer). (CVE-2021-38205)

  - net/nfc/llcp_sock.c in the Linux kernel before 5.12.10 allows local unprivileged users to cause a denial     of service (NULL pointer dereference and BUG) by making a getsockname call after a certain type of failure     of a bind call. (CVE-2021-38208)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

ID	Name	Product	Family	Published	Updated	Severity
153668	Debian DSA-4978-1：linux - 安全性更新	Nessus	Debian Local Security Checks	9/25/2021	1/24/2025	high
158697	Amazon Linux AMI：核心 (ALAS-2022-1571)	Nessus	Amazon Linux Local Security Checks	3/8/2022	12/11/2024	high
153770	Ubuntu 20.04 LTS：Linux 核心弱點 (USN-5092-1)	Nessus	Ubuntu Local Security Checks	9/28/2021	8/27/2024	high
156163	Debian DLA-2843-1：linux - LTS 安全性更新	Nessus	Debian Local Security Checks	12/17/2021	4/25/2023	high
160429	Amazon Linux 2 : kernel (ALASKERNEL-5.4-2022-006)	Nessus	Amazon Linux Local Security Checks	5/2/2022	5/23/2025	high
153789	Ubuntu 20.04 LTS : Linux kernel (OEM) vulnerabilities (USN-5096-1)	Nessus	Ubuntu Local Security Checks	9/30/2021	8/28/2024	high
155261	EulerOS 2.0 SP9 : kernel (EulerOS-SA-2021-2688)	Nessus	Huawei Local Security Checks	11/11/2021	11/24/2023	high
156431	EulerOS 2.0 SP5 : kernel (EulerOS-SA-2021-2934)	Nessus	Huawei Local Security Checks	12/31/2021	11/21/2023	high
154338	Ubuntu 20.04 LTS : Linux kernel (Azure) vulnerabilities (USN-5120-1)	Nessus	Ubuntu Local Security Checks	10/22/2021	8/28/2024	high
153908	Ubuntu 20.04 LTS : Linux kernel (OEM) vulnerabilities (USN-5106-1)	Nessus	Ubuntu Local Security Checks	10/7/2021	8/28/2024	high
158720	Amazon Linux 2 : kernel (ALAS-2022-1761)	Nessus	Amazon Linux Local Security Checks	3/8/2022	12/11/2024	high
154812	EulerOS 2.0 SP8 : kernel (EulerOS-SA-2021-2636)	Nessus	Huawei Local Security Checks	11/2/2021	11/27/2023	high
155119	EulerOS 2.0 SP9 : kernel (EulerOS-SA-2021-2713)	Nessus	Huawei Local Security Checks	11/11/2021	11/24/2023	high

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