A flaw was found in libvirt while it generates SELinux MCS category pairs for VMs' dynamic labels. This flaw allows one exploited guest to access files labeled for another guest, resulting in the breaking out of sVirt confinement. The highest threat from this vulnerability is to confidentiality and integrity.

The remote Debian 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-3778 advisory.

  - A NULL pointer dereference was found in the libvirt API responsible introduced in upstream version 3.10.0,     and fixed in libvirt 6.0.0, for fetching a storage pool based on its target path. In more detail, this     flaw affects storage pools created without a target path such as network-based pools like gluster and RBD.
    Unprivileged users with a read-only connection could abuse this flaw to crash the libvirt daemon,     resulting in a potential denial of service. (CVE-2020-10703)

  - An issue was discovered in qemuDomainGetStatsIOThread in qemu/qemu_driver.c in libvirt 4.10.0 though 6.x     before 6.1.0. A memory leak was found in the virDomainListGetStats libvirt API that is responsible for     retrieving domain statistics when managing QEMU guests. This flaw allows unprivileged users with a read-     only connection to cause a memory leak in the domstats command, resulting in a potential denial of     service. (CVE-2020-12430)

  - A double free memory issue was found to occur in the libvirt API, in versions before 6.8.0, responsible     for requesting information about network interfaces of a running QEMU domain. This flaw affects the polkit     access control driver. Specifically, clients connecting to the read-write socket with limited ACL     permissions could use this flaw to crash the libvirt daemon, resulting in a denial of service, or     potentially escalate their privileges on the system. The highest threat from this vulnerability is to data     confidentiality and integrity as well as system availability. (CVE-2020-25637)

  - A flaw was found in libvirt while it generates SELinux MCS category pairs for VMs' dynamic labels. This     flaw allows one exploited guest to access files labeled for another guest, resulting in the breaking out     of sVirt confinement. The highest threat from this vulnerability is to confidentiality and integrity.
    (CVE-2021-3631)

  - An improper locking issue was found in the virStoragePoolLookupByTargetPath API of libvirt. It occurs in     the storagePoolLookupByTargetPath function where a locked virStoragePoolObj object is not properly     released on ACL permission failure. Clients connecting to the read-write socket with limited ACL     permissions could use this flaw to acquire the lock and prevent other users from accessing storage     pool/volume APIs, resulting in a denial of service condition. The highest threat from this vulnerability     is to system availability. (CVE-2021-3667)

  - A use-after-free flaw was found in libvirt. The qemuMonitorUnregister() function in     qemuProcessHandleMonitorEOF is called using multiple threads without being adequately protected by a     monitor lock. This flaw could be triggered by the virConnectGetAllDomainStats API when the guest is     shutting down. An unprivileged client with a read-only connection could use this flaw to perform a denial     of service attack by causing the libvirt daemon to crash. (CVE-2021-3975)

  - A flaw was found in the libvirt libxl driver. A malicious guest could continuously reboot itself and cause     libvirtd on the host to deadlock or crash, resulting in a denial of service condition. (CVE-2021-4147)

  - A flaw was found in the libvirt nwfilter driver. The virNWFilterObjListNumOfNWFilters method failed to     acquire the driver->nwfilters mutex before iterating over virNWFilterObj instances. There was no     protection to stop another thread from concurrently modifying the driver->nwfilters object. This flaw     allows a malicious, unprivileged user to exploit this issue via libvirt's API virConnectNumOfNWFilters to     crash the network filter management daemon (libvirtd/virtnwfilterd). (CVE-2022-0897)

  - An off-by-one error flaw was found in the udevListInterfacesByStatus() function in libvirt when the number     of interfaces exceeds the size of the `names` array. This issue can be reproduced by sending specially     crafted data to the libvirt daemon, allowing an unprivileged client to perform a denial of service attack     by causing the libvirt daemon to crash. (CVE-2024-1441)

  - A flaw was found in the RPC library APIs of libvirt. The RPC server deserialization code allocates memory     for arrays before the non-negative length check is performed by the C API entry points. Passing a negative     length to the g_new0 function results in a crash due to the negative length being treated as a huge     positive number. This flaw allows a local, unprivileged user to perform a denial of service attack by     causing the libvirt daemon to crash. (CVE-2024-2494)

  - A NULL pointer dereference flaw was found in the udevConnectListAllInterfaces() function in libvirt. This     issue can occur when detaching a host interface while at the same time collecting the list of interfaces     via virConnectListAllInterfaces API. This flaw could be used to perform a denial of service attack by     causing the libvirt daemon to crash. (CVE-2024-2496)

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

The remote Rocky Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RLSA-2021:4191 advisory.

  - QEMU 4.2.0 has a use-after-free in hw/net/e1000e_core.c because a guest OS user can trigger an e1000e     packet with the data's address set to the e1000e's MMIO address. (CVE-2020-15859)

  - An invalid pointer initialization issue was found in the SLiRP networking implementation of QEMU. The flaw     exists in the bootp_input() function and could occur while processing a udp packet that is smaller than     the size of the 'bootp_t' structure. A malicious guest could use this flaw to leak 10 bytes of     uninitialized heap memory from the host. The highest threat from this vulnerability is to data     confidentiality. This flaw affects libslirp versions prior to 4.6.0. (CVE-2021-3592)

  - An invalid pointer initialization issue was found in the SLiRP networking implementation of QEMU. The flaw     exists in the udp6_input() function and could occur while processing a udp packet that is smaller than the     size of the 'udphdr' structure. This issue may lead to out-of-bounds read access or indirect host memory     disclosure to the guest. The highest threat from this vulnerability is to data confidentiality. This flaw     affects libslirp versions prior to 4.6.0. (CVE-2021-3593)

  - An invalid pointer initialization issue was found in the SLiRP networking implementation of QEMU. The flaw     exists in the udp_input() function and could occur while processing a udp packet that is smaller than the     size of the 'udphdr' structure. This issue may lead to out-of-bounds read access or indirect host memory     disclosure to the guest. The highest threat from this vulnerability is to data confidentiality. This flaw     affects libslirp versions prior to 4.6.0. (CVE-2021-3594)

  - An invalid pointer initialization issue was found in the SLiRP networking implementation of QEMU. The flaw     exists in the tftp_input() function and could occur while processing a udp packet that is smaller than the     size of the 'tftp_t' structure. This issue may lead to out-of-bounds read access or indirect host memory     disclosure to the guest. The highest threat from this vulnerability is to data confidentiality. This flaw     affects libslirp versions prior to 4.6.0. (CVE-2021-3595)

  - A flaw was found in libvirt while it generates SELinux MCS category pairs for VMs' dynamic labels. This     flaw allows one exploited guest to access files labeled for another guest, resulting in the breaking out     of sVirt confinement. The highest threat from this vulnerability is to confidentiality and integrity.
    (CVE-2021-3631)

  - An improper locking issue was found in the virStoragePoolLookupByTargetPath API of libvirt. It occurs in     the storagePoolLookupByTargetPath function where a locked virStoragePoolObj object is not properly     released on ACL permission failure. Clients connecting to the read-write socket with limited ACL     permissions could use this flaw to acquire the lock and prevent other users from accessing storage     pool/volume APIs, resulting in a denial of service condition. The highest threat from this vulnerability     is to system availability. (CVE-2021-3667)

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

The remote Oracle Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2023-12108 advisory.

  - A flaw was found in the QEMU implementation of VMWare's paravirtual RDMA device. This flaw allows a     crafted guest driver to execute HW commands when shared buffers are not yet allocated, potentially leading     to a use-after-free condition. (CVE-2022-1050)

  - A flaw was found in libvirt while it generates SELinux MCS category pairs for VMs' dynamic labels. This     flaw allows one exploited guest to access files labeled for another guest, resulting in the breaking out     of sVirt confinement. The highest threat from this vulnerability is to confidentiality and integrity.
    (CVE-2021-3631)

  - An out-of-bounds memory access flaw was found in the ATI VGA device emulation of QEMU. This flaw occurs in     the ati_2d_blt() routine while handling MMIO write operations when the guest provides invalid values for     the destination display parameters. A malicious guest could use this flaw to crash the QEMU process on the     host, resulting in a denial of service. (CVE-2021-3638)

  - An integer underflow issue was found in the QEMU VNC server while processing ClientCutText messages in the     extended format. A malicious client could use this flaw to make QEMU unresponsive by sending a specially     crafted payload message, resulting in a denial of service. (CVE-2022-3165)

  - An integer overflow and buffer overflow issues were found in the ACPI Error Record Serialization Table     (ERST) device of QEMU in the read_erst_record() and write_erst_record() functions. Both issues may allow     the guest to overrun the host buffer allocated for the ERST memory device. A malicious guest could use     these flaws to crash the QEMU process on the host. (CVE-2022-4172)

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

The remote Oracle Linux 8 host has packages installed that are affected by a vulnerability as referenced in the ELSA-2022-10093 advisory.

  - A flaw was found in libvirt while it generates SELinux MCS category pairs for VMs' dynamic labels. This     flaw allows one exploited guest to access files labeled for another guest, resulting in the breaking out     of sVirt confinement. The highest threat from this vulnerability is to confidentiality and integrity.
    (CVE-2021-3631)

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

The remote Oracle Linux 7 host has packages installed that are affected by a vulnerability as referenced in the ELSA-2022-10062 advisory.

  - A flaw was found in libvirt while it generates SELinux MCS category pairs for VMs' dynamic labels. This     flaw allows one exploited guest to access files labeled for another guest, resulting in the breaking out     of sVirt confinement. The highest threat from this vulnerability is to confidentiality and integrity.
    (CVE-2021-3631)

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

The remote host is affected by the vulnerability described in GLSA-202210-06 (libvirt: Multiple Vulnerabilities)

  - A flaw was found in libvirt, where it leaked a file descriptor for `/dev/mapper/control` into the QEMU     process. This file descriptor allows for privileged operations to happen against the device-mapper on the     host. This flaw allows a malicious guest user or process to perform operations outside of their standard     permissions, potentially causing serious damage to the host operating system. The highest threat from this     vulnerability is to confidentiality, integrity, as well as system availability. (CVE-2020-14339)

  - A double free memory issue was found to occur in the libvirt API, in versions before 6.8.0, responsible     for requesting information about network interfaces of a running QEMU domain. This flaw affects the polkit     access control driver. Specifically, clients connecting to the read-write socket with limited ACL     permissions could use this flaw to crash the libvirt daemon, resulting in a denial of service, or     potentially escalate their privileges on the system. The highest threat from this vulnerability is to data     confidentiality and integrity as well as system availability. (CVE-2020-25637)

  - A flaw was found in libvirt while it generates SELinux MCS category pairs for VMs' dynamic labels. This     flaw allows one exploited guest to access files labeled for another guest, resulting in the breaking out     of sVirt confinement. The highest threat from this vulnerability is to confidentiality and integrity.
    (CVE-2021-3631)

  - An improper locking issue was found in the virStoragePoolLookupByTargetPath API of libvirt. It occurs in     the storagePoolLookupByTargetPath function where a locked virStoragePoolObj object is not properly     released on ACL permission failure. Clients connecting to the read-write socket with limited ACL     permissions could use this flaw to acquire the lock and prevent other users from accessing storage     pool/volume APIs, resulting in a denial of service condition. The highest threat from this vulnerability     is to system availability. (CVE-2021-3667)

  - A flaw was found in the libvirt nwfilter driver. The virNWFilterObjListNumOfNWFilters method failed to     acquire the driver->nwfilters mutex before iterating over virNWFilterObj instances. There was no     protection to stop another thread from concurrently modifying the driver->nwfilters object. This flaw     allows a malicious, unprivileged user to exploit this issue via libvirt's API virConnectNumOfNWFilters to     crash the network filter management daemon (libvirtd/virtnwfilterd). (CVE-2022-0897)

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 libvirt packages installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities :

  - A flaw was found in libvirt while it generates SELinux MCS category pairs for VMs' dynamic labels. This     flaw allows one exploited guest to access files labeled for another guest, resulting in the breaking out     of sVirt confinement. The highest threat from this vulnerability is to confidentiality and integrity.
    (CVE-2021-3631)

  - A flaw was found in the libvirt nwfilter driver. The virNWFilterObjListNumOfNWFilters method failed to     acquire the driver->nwfilters mutex before iterating over virNWFilterObj instances. There was no     protection to stop another thread from concurrently modifying the driver->nwfilters object. This flaw     allows a malicious, unprivileged user to exploit this issue via libvirt's API virConnectNumOfNWFilters to     crash the network filter management daemon (libvirtd/virtnwfilterd). (CVE-2022-0897)

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 libvirt package installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities :

  - A flaw was found in libvirt while it generates SELinux MCS category pairs for VMs' dynamic labels. This     flaw allows one exploited guest to access files labeled for another guest, resulting in the breaking out     of sVirt confinement. The highest threat from this vulnerability is to confidentiality and integrity.
    (CVE-2021-3631)

  - An improper locking issue was found in the virStoragePoolLookupByTargetPath API of libvirt. It occurs in     the storagePoolLookupByTargetPath function where a locked virStoragePoolObj object is not properly     released on ACL permission failure. Clients connecting to the read-write socket with limited ACL     permissions could use this flaw to acquire the lock and prevent other users from accessing storage     pool/volume APIs, resulting in a denial of service condition. The highest threat from this vulnerability     is to system availability. (CVE-2021-3667)

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 18.04 LTS / 20.04 LTS / 21.10 host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-5399-1 advisory.

  - A double free memory issue was found to occur in the libvirt API, in versions before 6.8.0, responsible     for requesting information about network interfaces of a running QEMU domain. This flaw affects the polkit     access control driver. Specifically, clients connecting to the read-write socket with limited ACL     permissions could use this flaw to crash the libvirt daemon, resulting in a denial of service, or     potentially escalate their privileges on the system. The highest threat from this vulnerability is to data     confidentiality and integrity as well as system availability. (CVE-2020-25637)

  - A flaw was found in libvirt while it generates SELinux MCS category pairs for VMs' dynamic labels. This     flaw allows one exploited guest to access files labeled for another guest, resulting in the breaking out     of sVirt confinement. The highest threat from this vulnerability is to confidentiality and integrity.
    (CVE-2021-3631)

  - An improper locking issue was found in the virStoragePoolLookupByTargetPath API of libvirt. It occurs in     the storagePoolLookupByTargetPath function where a locked virStoragePoolObj object is not properly     released on ACL permission failure. Clients connecting to the read-write socket with limited ACL     permissions could use this flaw to acquire the lock and prevent other users from accessing storage     pool/volume APIs, resulting in a denial of service condition. The highest threat from this vulnerability     is to system availability. (CVE-2021-3667)

  - A flaw was found in the libvirt libxl driver. A malicious guest could continuously reboot itself and cause     libvirtd on the host to deadlock or crash, resulting in a denial of service condition. (CVE-2021-4147)

  - A flaw was found in the libvirt nwfilter driver. The virNWFilterObjListNumOfNWFilters method failed to     acquire the `driver->nwfilters` mutex before iterating over virNWFilterObj instances. There was no     protection to stop another thread from concurrently modifying the `driver->nwfilters` object. This flaw     allows a malicious, unprivileged user to exploit this issue via libvirt's API virConnectNumOfNWFilters to     crash the network filter management daemon (libvirtd/virtnwfilterd). (CVE-2022-0897)

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

The remote AlmaLinux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALSA-2021:4191 advisory.

  - QEMU 4.2.0 has a use-after-free in hw/net/e1000e_core.c because a guest OS user can trigger an e1000e     packet with the data's address set to the e1000e's MMIO address. (CVE-2020-15859)

  - An invalid pointer initialization issue was found in the SLiRP networking implementation of QEMU. The flaw     exists in the bootp_input() function and could occur while processing a udp packet that is smaller than     the size of the 'bootp_t' structure. A malicious guest could use this flaw to leak 10 bytes of     uninitialized heap memory from the host. The highest threat from this vulnerability is to data     confidentiality. This flaw affects libslirp versions prior to 4.6.0. (CVE-2021-3592)

  - An invalid pointer initialization issue was found in the SLiRP networking implementation of QEMU. The flaw     exists in the udp6_input() function and could occur while processing a udp packet that is smaller than the     size of the 'udphdr' structure. This issue may lead to out-of-bounds read access or indirect host memory     disclosure to the guest. The highest threat from this vulnerability is to data confidentiality. This flaw     affects libslirp versions prior to 4.6.0. (CVE-2021-3593)

  - An invalid pointer initialization issue was found in the SLiRP networking implementation of QEMU. The flaw     exists in the udp_input() function and could occur while processing a udp packet that is smaller than the     size of the 'udphdr' structure. This issue may lead to out-of-bounds read access or indirect host memory     disclosure to the guest. The highest threat from this vulnerability is to data confidentiality. This flaw     affects libslirp versions prior to 4.6.0. (CVE-2021-3594)

  - An invalid pointer initialization issue was found in the SLiRP networking implementation of QEMU. The flaw     exists in the tftp_input() function and could occur while processing a udp packet that is smaller than the     size of the 'tftp_t' structure. This issue may lead to out-of-bounds read access or indirect host memory     disclosure to the guest. The highest threat from this vulnerability is to data confidentiality. This flaw     affects libslirp versions prior to 4.6.0. (CVE-2021-3595)

  - A flaw was found in libvirt while it generates SELinux MCS category pairs for VMs' dynamic labels. This     flaw allows one exploited guest to access files labeled for another guest, resulting in the breaking out     of sVirt confinement. The highest threat from this vulnerability is to confidentiality and integrity.
    (CVE-2021-3631)

  - An improper locking issue was found in the virStoragePoolLookupByTargetPath API of libvirt. It occurs in     the storagePoolLookupByTargetPath function where a locked virStoragePoolObj object is not properly     released on ACL permission failure. Clients connecting to the read-write socket with limited ACL     permissions could use this flaw to acquire the lock and prevent other users from accessing storage     pool/volume APIs, resulting in a denial of service condition. The highest threat from this vulnerability     is to system availability. (CVE-2021-3667)

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

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

  - A flaw was found in libvirt while it generates SELinux MCS category pairs for VMs' dynamic labels. This     flaw allows one exploited guest to access files labeled for another guest, resulting in the breaking out     of sVirt confinement. The highest threat from this vulnerability is to confidentiality and integrity.
    (CVE-2021-3631)

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 Oracle Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2021-4191 advisory.

  - An invalid pointer initialization issue was found in the SLiRP networking implementation of QEMU. The flaw     exists in the udp_input() function and could occur while processing a udp packet that is smaller than the     size of the 'udphdr' structure. This issue may lead to out-of-bounds read access or indirect host memory     disclosure to the guest. The highest threat from this vulnerability is to data confidentiality. This flaw     affects libslirp versions prior to 4.6.0. (CVE-2021-3594)

  - libvirt: Improper locking on ACL failure in virStoragePoolLookupByTargetPath API (CVE-2021-3667)

  - QEMU 4.2.0 has a use-after-free in hw/net/e1000e_core.c because a guest OS user can trigger an e1000e     packet with the data's address set to the e1000e's MMIO address. (CVE-2020-15859)

  - An invalid pointer initialization issue was found in the SLiRP networking implementation of QEMU. The flaw     exists in the bootp_input() function and could occur while processing a udp packet that is smaller than     the size of the 'bootp_t' structure. A malicious guest could use this flaw to leak 10 bytes of     uninitialized heap memory from the host. The highest threat from this vulnerability is to data     confidentiality. This flaw affects libslirp versions prior to 4.6.0. (CVE-2021-3592)

  - An invalid pointer initialization issue was found in the SLiRP networking implementation of QEMU. The flaw     exists in the udp6_input() function and could occur while processing a udp packet that is smaller than the     size of the 'udphdr' structure. This issue may lead to out-of-bounds read access or indirect host memory     disclosure to the guest. The highest threat from this vulnerability is to data confidentiality. This flaw     affects libslirp versions prior to 4.6.0. (CVE-2021-3593)

  - An invalid pointer initialization issue was found in the SLiRP networking implementation of QEMU. The flaw     exists in the tftp_input() function and could occur while processing a udp packet that is smaller than the     size of the 'tftp_t' structure. This issue may lead to out-of-bounds read access or indirect host memory     disclosure to the guest. The highest threat from this vulnerability is to data confidentiality. This flaw     affects libslirp versions prior to 4.6.0. (CVE-2021-3595)

  - libvirt: Insecure sVirt label generation (CVE-2021-3631)

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

The remote CentOS Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the CESA-2021:4191 advisory.

  - QEMU: net: e1000e: use-after-free while sending packets (CVE-2020-15859)

  - QEMU: slirp: invalid pointer initialization may lead to information disclosure (bootp) (CVE-2021-3592)

  - QEMU: slirp: invalid pointer initialization may lead to information disclosure (udp6) (CVE-2021-3593)

  - QEMU: slirp: invalid pointer initialization may lead to information disclosure (udp) (CVE-2021-3594)

  - QEMU: slirp: invalid pointer initialization may lead to information disclosure (tftp) (CVE-2021-3595)

  - libvirt: Insecure sVirt label generation (CVE-2021-3631)

  - libvirt: Improper locking on ACL failure in virStoragePoolLookupByTargetPath API (CVE-2021-3667)

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

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2021:4191 advisory.

  - QEMU: net: e1000e: use-after-free while sending packets (CVE-2020-15859)

  - QEMU: slirp: invalid pointer initialization may lead to information disclosure (bootp) (CVE-2021-3592)

  - QEMU: slirp: invalid pointer initialization may lead to information disclosure (udp6) (CVE-2021-3593)

  - QEMU: slirp: invalid pointer initialization may lead to information disclosure (udp) (CVE-2021-3594)

  - QEMU: slirp: invalid pointer initialization may lead to information disclosure (tftp) (CVE-2021-3595)

  - libvirt: Insecure sVirt label generation (CVE-2021-3631)

  - libvirt: Improper locking on ACL failure in virStoragePoolLookupByTargetPath API (CVE-2021-3667)

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

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2021:3704 advisory.

  - libvirt: Insecure sVirt label generation (CVE-2021-3631)

  - libvirt: Improper locking on ACL failure in virStoragePoolLookupByTargetPath API (CVE-2021-3667)

  - QEMU: usbredir: free() call on invalid pointer in bufp_alloc() (CVE-2021-3682)

  - ntfs-3g: Out-of-bounds heap buffer access in ntfs_get_attribute_value() due to incorrect check of     bytes_in_use value in MFT records (CVE-2021-33285)

  - ntfs-3g: Heap buffer overflow triggered by a specially crafted Unicode string (CVE-2021-33286)

  - ntfs-3g: Heap buffer overflow in ntfs_attr_pread_i() triggered by specially crafted NTFS attributes     (CVE-2021-33287)

  - ntfs-3g: Heap buffer overflow triggered by a specially crafted MFT section (CVE-2021-33289)

  - ntfs-3g: Heap buffer overflow triggered by a specially crafted NTFS inode pathname (CVE-2021-35266)

  - ntfs-3g: Stack buffer overflow triggered when correcting differences between MFT and MFTMirror sections     (CVE-2021-35267)

  - ntfs-3g: Heap buffer overflow in ntfs_inode_real_open() triggered by a specially crafted NTFS inode     (CVE-2021-35268)

  - ntfs-3g: Heap buffer overflow in ntfs_attr_setup_flag() triggered by a specially crafted NTFS attribute     from MFT (CVE-2021-35269)

  - ntfs-3g: NULL pointer dereference in ntfs_extent_inode_open() (CVE-2021-39251)

  - ntfs-3g: Out-of-bounds read in ntfs_ie_lookup() (CVE-2021-39252)

  - ntfs-3g: Out-of-bounds read in ntfs_runlists_merge_i() (CVE-2021-39253)

  - ntfs-3g: Integer overflow in memmove() leading to heap buffer overflow in ntfs_attr_record_resize()     (CVE-2021-39254)

  - ntfs-3g: Out-of-bounds read ntfs_attr_find_in_attrdef() triggered by an invalid attribute (CVE-2021-39255)

  - ntfs-3g: Heap buffer overflow in ntfs_inode_lookup_by_name() (CVE-2021-39256)

  - ntfs-3g: Endless recursion from ntfs_attr_pwrite() triggered by an unallocated bitmap (CVE-2021-39257)

  - ntfs-3g: Out-of-bounds reads in ntfs_attr_find() and ntfs_external_attr_find() (CVE-2021-39258)

  - ntfs-3g: Out-of-bounds access in ntfs_inode_lookup_by_name() caused by an unsanitized attribute length     (CVE-2021-39259)

  - ntfs-3g: Out-of-bounds access in ntfs_inode_sync_standard_information() (CVE-2021-39260)

  - ntfs-3g: Heap buffer overflow in ntfs_compressed_pwrite() (CVE-2021-39261)

  - ntfs-3g: Out-of-bounds access in ntfs_decompress() (CVE-2021-39262)

  - ntfs-3g: Heap buffer overflow in ntfs_get_attribute_value() caused by an unsanitized attribute     (CVE-2021-39263)

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

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2021:3703 advisory.

  - QEMU: net: Infinite loop in loopback mode may lead to stack overflow (CVE-2021-3416)

  - libvirt: Insecure sVirt label generation (CVE-2021-3631)

  - libvirt: Improper locking on ACL failure in virStoragePoolLookupByTargetPath API (CVE-2021-3667)

  - QEMU: usbredir: free() call on invalid pointer in bufp_alloc() (CVE-2021-3682)

  - ntfs-3g: Out-of-bounds heap buffer access in ntfs_get_attribute_value() due to incorrect check of     bytes_in_use value in MFT records (CVE-2021-33285)

  - ntfs-3g: Heap buffer overflow triggered by a specially crafted Unicode string (CVE-2021-33286)

  - ntfs-3g: Heap buffer overflow in ntfs_attr_pread_i() triggered by specially crafted NTFS attributes     (CVE-2021-33287)

  - ntfs-3g: Heap buffer overflow triggered by a specially crafted MFT section (CVE-2021-33289)

  - ntfs-3g: Heap buffer overflow triggered by a specially crafted NTFS inode pathname (CVE-2021-35266)

  - ntfs-3g: Stack buffer overflow triggered when correcting differences between MFT and MFTMirror sections     (CVE-2021-35267)

  - ntfs-3g: Heap buffer overflow in ntfs_inode_real_open() triggered by a specially crafted NTFS inode     (CVE-2021-35268)

  - ntfs-3g: Heap buffer overflow in ntfs_attr_setup_flag() triggered by a specially crafted NTFS attribute     from MFT (CVE-2021-35269)

  - ntfs-3g: NULL pointer dereference in ntfs_extent_inode_open() (CVE-2021-39251)

  - ntfs-3g: Out-of-bounds read in ntfs_ie_lookup() (CVE-2021-39252)

  - ntfs-3g: Out-of-bounds read in ntfs_runlists_merge_i() (CVE-2021-39253)

  - ntfs-3g: Integer overflow in memmove() leading to heap buffer overflow in ntfs_attr_record_resize()     (CVE-2021-39254)

  - ntfs-3g: Out-of-bounds read ntfs_attr_find_in_attrdef() triggered by an invalid attribute (CVE-2021-39255)

  - ntfs-3g: Heap buffer overflow in ntfs_inode_lookup_by_name() (CVE-2021-39256)

  - ntfs-3g: Endless recursion from ntfs_attr_pwrite() triggered by an unallocated bitmap (CVE-2021-39257)

  - ntfs-3g: Out-of-bounds reads in ntfs_attr_find() and ntfs_external_attr_find() (CVE-2021-39258)

  - ntfs-3g: Out-of-bounds access in ntfs_inode_lookup_by_name() caused by an unsanitized attribute length     (CVE-2021-39259)

  - ntfs-3g: Out-of-bounds access in ntfs_inode_sync_standard_information() (CVE-2021-39260)

  - ntfs-3g: Heap buffer overflow in ntfs_compressed_pwrite() (CVE-2021-39261)

  - ntfs-3g: Out-of-bounds access in ntfs_decompress() (CVE-2021-39262)

  - ntfs-3g: Heap buffer overflow in ntfs_get_attribute_value() caused by an unsanitized attribute     (CVE-2021-39263)

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

The remote SUSE Linux SLED15 / SLES15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2021:2812-1 advisory.

  - A flaw was found in libvirt while it generates SELinux MCS category pairs for VMs' dynamic labels. This     flaw allows one exploited guest to access files labeled for another guest, resulting in the breaking out     of sVirt confinement. The highest threat from this vulnerability is to confidentiality and integrity.
    (CVE-2021-3631)

  - An improper locking issue was found in the virStoragePoolLookupByTargetPath API of libvirt. It occurs in     the storagePoolLookupByTargetPath function where a locked virStoragePoolObj object is not properly     released on ACL permission failure. Clients connecting to the read-write socket with limited ACL     permissions could use this flaw to acquire the lock and prevent other users from accessing storage     pool/volume APIs, resulting in a denial of service condition. The highest threat from this vulnerability     is to system availability. (CVE-2021-3667)

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

The remote SUSE Linux SUSE15 host has packages installed that are affected by multiple vulnerabilities as referenced in the openSUSE-SU-2021:2812-1 advisory.

  - A flaw was found in libvirt while it generates SELinux MCS category pairs for VMs' dynamic labels. This     flaw allows one exploited guest to access files labeled for another guest, resulting in the breaking out     of sVirt confinement. The highest threat from this vulnerability is to confidentiality and integrity.
    (CVE-2021-3631)

  - An improper locking issue was found in the virStoragePoolLookupByTargetPath API of libvirt. It occurs in     the storagePoolLookupByTargetPath function where a locked virStoragePoolObj object is not properly     released on ACL permission failure. Clients connecting to the read-write socket with limited ACL     permissions could use this flaw to acquire the lock and prevent other users from accessing storage     pool/volume APIs, resulting in a denial of service condition. The highest threat from this vulnerability     is to system availability. (CVE-2021-3667)

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

The remote SUSE Linux SUSE15 host has packages installed that are affected by a vulnerability as referenced in the openSUSE-SU-2021:1119-1 advisory.

  - A flaw was found in libvirt while it generates SELinux MCS category pairs for VMs' dynamic labels. This     flaw allows one exploited guest to access files labeled for another guest, resulting in the breaking out     of sVirt confinement. The highest threat from this vulnerability is to confidentiality and integrity.
    (CVE-2021-3631)

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

The remote SUSE Linux SLED15 / SLES15 host has packages installed that are affected by a vulnerability as referenced in the SUSE-SU-2021:2471-1 advisory.

  - A flaw was found in libvirt while it generates SELinux MCS category pairs for VMs' dynamic labels. This     flaw allows one exploited guest to access files labeled for another guest, resulting in the breaking out     of sVirt confinement. The highest threat from this vulnerability is to confidentiality and integrity.
    (CVE-2021-3631)

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

ID	Name	Product	Family	Severity
192736	Debian dla-3778 : libnss-libvirt - security update	Nessus	Debian Local Security Checks	medium
185037	Rocky Linux 8 : virt:rhel and virt-devel:rhel (RLSA-2021:4191)	Nessus	Rocky Linux Local Security Checks	medium
171222	Oracle Linux 8 : virt:kvm_utils (ELSA-2023-12108)	Nessus	Oracle Linux Local Security Checks	high
168881	Oracle Linux 8 : virt:kvm_utils (ELSA-2022-10093)	Nessus	Oracle Linux Local Security Checks	medium
168425	Oracle Linux 7 : libvirt (ELSA-2022-10062)	Nessus	Oracle Linux Local Security Checks	medium
166166	GLSA-202210-06 : libvirt: Multiple Vulnerabilities	Nessus	Gentoo Local Security Checks	high
165896	EulerOS Virtualization 3.0.6.6 : libvirt (EulerOS-SA-2022-2515)	Nessus	Huawei Local Security Checks	medium
163193	EulerOS Virtualization 2.10.0 : libvirt (EulerOS-SA-2022-2045)	Nessus	Huawei Local Security Checks	medium
163186	EulerOS Virtualization 2.10.1 : libvirt (EulerOS-SA-2022-2073)	Nessus	Huawei Local Security Checks	medium
160444	Ubuntu 18.04 LTS / 20.04 LTS : libvirt vulnerabilities (USN-5399-1)	Nessus	Ubuntu Local Security Checks	medium
158874	AlmaLinux 8 : virt:rhel and virt-devel:rhel (ALSA-2021:4191)	Nessus	Alma Linux Local Security Checks	medium
156356	EulerOS Virtualization 3.0.2.0 : libvirt (EulerOS-SA-2021-2847)	Nessus	Huawei Local Security Checks	medium
155984	Oracle Linux 8 : virt:ol / and / virt-devel:ol (ELSA-2021-4191)	Nessus	Oracle Linux Local Security Checks	medium
155176	CentOS 8 : virt:rhel and virt-devel:rhel (CESA-2021:4191)	Nessus	CentOS Local Security Checks	medium
155110	RHEL 8 : virt:rhel and virt-devel:rhel (RHSA-2021:4191)	Nessus	Red Hat Local Security Checks	medium
153804	RHEL 8 : virt:8.2 and virt-devel:8.2 (RHSA-2021:3704)	Nessus	Red Hat Local Security Checks	high
153803	RHEL 8 : virt:av and virt-devel:av (RHSA-2021:3703)	Nessus	Red Hat Local Security Checks	high
152765	SUSE SLED15 / SLES15 Security Update : libvirt (SUSE-SU-2021:2812-1)	Nessus	SuSE Local Security Checks	medium
152757	openSUSE 15 Security Update : libvirt (openSUSE-SU-2021:2812-1)	Nessus	SuSE Local Security Checks	medium
152469	openSUSE 15 Security Update : libvirt (openSUSE-SU-2021:1119-1)	Nessus	SuSE Local Security Checks	medium
152105	SUSE SLED15 / SLES15 Security Update : libvirt (SUSE-SU-2021:2471-1)	Nessus	SuSE Local Security Checks	medium

Detections

Analytics

CVE-2021-3631

medium

Tenable Plugins

medium

medium

high

medium

medium

high

medium

medium

medium

medium

medium

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medium

medium

high

high

medium

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medium

medium