The 5.0.7 update contains a number of important fixes across the tree

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

Ke Sun, Henrique Kawakami, Kekai Hu, Rodrigo Branco, Giorgi Maisuradze, Dan Horea Lutas, Andrei Lutas, Volodymyr Pikhur, Stephan van Schaik, Alyssa Milburn, Sebastian Osterlund, Pietro Frigo, Kaveh Razavi, Herbert Bos, Cristiano Giuffrida, Moritz Lipp, Michael Schwarz, and Daniel Gruss discovered that memory previously stored in microarchitectural fill buffers of an Intel CPU core may be exposed to a malicious process that is executing on the same CPU core. A local attacker could use this to expose sensitive information.
(CVE-2018-12130)

Brandon Falk, Ke Sun, Henrique Kawakami, Kekai Hu, Rodrigo Branco, Stephan van Schaik, Alyssa Milburn, Sebastian Osterlund, Pietro Frigo, Kaveh Razavi, Herbert Bos, and Cristiano Giuffrida discovered that memory previously stored in microarchitectural load ports of an Intel CPU core may be exposed to a malicious process that is executing on the same CPU core. A local attacker could use this to expose sensitive information. (CVE-2018-12127)

Ke Sun, Henrique Kawakami, Kekai Hu, Rodrigo Branco, Marina Minkin, Daniel Moghimi, Moritz Lipp, Michael Schwarz, Jo Van Bulck, Daniel Genkin, Daniel Gruss, Berk Sunar, Frank Piessens, and Yuval Yarom discovered that memory previously stored in microarchitectural store buffers of an Intel CPU core may be exposed to a malicious process that is executing on the same CPU core. A local attacker could use this to expose sensitive information. (CVE-2018-12126)

Ke Sun, Henrique Kawakami, Kekai Hu, Rodrigo Branco, Volodrmyr Pikhur, Moritz Lipp, Michael Schwarz, Daniel Gruss, Stephan van Schaik, Alyssa Milburn, Sebastian Osterlund, Pietro Frigo, Kaveh Razavi, Herbert Bos, and Cristiano Giuffrida discovered that uncacheable memory previously stored in microarchitectural buffers of an Intel CPU core may be exposed to a malicious process that is executing on the same CPU core. A local attacker could use this to expose sensitive information. (CVE-2019-11091)

It was discovered that the IPv4 generic receive offload (GRO) for UDP implementation in the Linux kernel did not properly handle padded packets. A remote attacker could use this to cause a denial of service (system crash). (CVE-2019-11683)

It was discovered that a race condition existed in the Binder IPC driver for the Linux kernel. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code.
(CVE-2019-1999)

Matteo Croce, Natale Vinto, and Andrea Spagnolo discovered that the cgroups subsystem of the Linux kernel did not properly account for SCTP socket buffers. A local attacker could use this to cause a denial of service (system crash). (CVE-2019-3874)

Alex Williamson discovered that the vfio subsystem of the Linux kernel did not properly limit DMA mappings. A local attacker could use this to cause a denial of service (memory exhaustion). (CVE-2019-3882)

Marc Orr discovered that the KVM hypervisor implementation in the Linux kernel did not properly restrict APIC MSR register values when nested virtualization is used. An attacker in a guest vm could use this to cause a denial of service (host OS crash). (CVE-2019-3887)

Hugues Anguelkov discovered that the Broadcom Wifi driver in the Linux kernel contained a heap buffer overflow. A physically proximate attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2019-9500)

Hugues Anguelkov discovered that the Broadcom Wifi driver in the Linux kernel did not properly prevent remote firmware events from being processed for USB Wifi devices. A physically proximate attacker could use this to send firmware events to the device. (CVE-2019-9503).

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

Ke Sun, Henrique Kawakami, Kekai Hu, Rodrigo Branco, Giorgi Maisuradze, Dan Horea Lutas, Andrei Lutas, Volodymyr Pikhur, Stephan van Schaik, Alyssa Milburn, Sebastian Osterlund, Pietro Frigo, Kaveh Razavi, Herbert Bos, Cristiano Giuffrida, Moritz Lipp, Michael Schwarz, and Daniel Gruss discovered that memory previously stored in microarchitectural fill buffers of an Intel CPU core may be exposed to a malicious process that is executing on the same CPU core. A local attacker could use this to expose sensitive information.
(CVE-2018-12130)

Brandon Falk, Ke Sun, Henrique Kawakami, Kekai Hu, Rodrigo Branco, Stephan van Schaik, Alyssa Milburn, Sebastian Osterlund, Pietro Frigo, Kaveh Razavi, Herbert Bos, and Cristiano Giuffrida discovered that memory previously stored in microarchitectural load ports of an Intel CPU core may be exposed to a malicious process that is executing on the same CPU core. A local attacker could use this to expose sensitive information. (CVE-2018-12127)

Ke Sun, Henrique Kawakami, Kekai Hu, Rodrigo Branco, Marina Minkin, Daniel Moghimi, Moritz Lipp, Michael Schwarz, Jo Van Bulck, Daniel Genkin, Daniel Gruss, Berk Sunar, Frank Piessens, and Yuval Yarom discovered that memory previously stored in microarchitectural store buffers of an Intel CPU core may be exposed to a malicious process that is executing on the same CPU core. A local attacker could use this to expose sensitive information. (CVE-2018-12126)

Vasily Averin and Evgenii Shatokhin discovered that a use-after-free vulnerability existed in the NFS41+ subsystem when multiple network namespaces are in use. A local attacker in a container could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2018-16884)

Ke Sun, Henrique Kawakami, Kekai Hu, Rodrigo Branco, Volodrmyr Pikhur, Moritz Lipp, Michael Schwarz, Daniel Gruss, Stephan van Schaik, Alyssa Milburn, Sebastian Osterlund, Pietro Frigo, Kaveh Razavi, Herbert Bos, and Cristiano Giuffrida discovered that uncacheable memory previously stored in microarchitectural buffers of an Intel CPU core may be exposed to a malicious process that is executing on the same CPU core. A local attacker could use this to expose sensitive information. (CVE-2019-11091)

Matteo Croce, Natale Vinto, and Andrea Spagnolo discovered that the cgroups subsystem of the Linux kernel did not properly account for SCTP socket buffers. A local attacker could use this to cause a denial of service (system crash). (CVE-2019-3874)

Alex Williamson discovered that the vfio subsystem of the Linux kernel did not properly limit DMA mappings. A local attacker could use this to cause a denial of service (memory exhaustion). (CVE-2019-3882)

Marc Orr discovered that the KVM hypervisor implementation in the Linux kernel did not properly restrict APIC MSR register values when nested virtualization is used. An attacker in a guest vm could use this to cause a denial of service (host OS crash). (CVE-2019-3887)

Hugues Anguelkov discovered that the Broadcom Wifi driver in the Linux kernel contained a heap buffer overflow. A physically proximate attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2019-9500)

Hugues Anguelkov discovered that the Broadcom Wifi driver in the Linux kernel did not properly prevent remote firmware events from being processed for USB Wifi devices. A physically proximate attacker could use this to send firmware events to the device. (CVE-2019-9503).

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu 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 host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-3980-2 advisory.

  - Microarchitectural Store Buffer Data Sampling (MSBDS): Store buffers on some microprocessors utilizing     speculative execution may allow an authenticated user to potentially enable information disclosure via a     side channel with local access. A list of impacted products can be found here:
    https://www.intel.com/content/dam/www/public/us/en/documents/corporate-information/SA00233-microcode-     update-guidance_05132019.pdf (CVE-2018-12126)

  - Microarchitectural Load Port Data Sampling (MLPDS): Load ports on some microprocessors utilizing     speculative execution may allow an authenticated user to potentially enable information disclosure via a     side channel with local access. A list of impacted products can be found here:
    https://www.intel.com/content/dam/www/public/us/en/documents/corporate-information/SA00233-microcode-     update-guidance_05132019.pdf (CVE-2018-12127)

  - Microarchitectural Fill Buffer Data Sampling (MFBDS): Fill buffers on some microprocessors utilizing     speculative execution may allow an authenticated user to potentially enable information disclosure via a     side channel with local access. A list of impacted products can be found here:
    https://www.intel.com/content/dam/www/public/us/en/documents/corporate-information/SA00233-microcode-     update-guidance_05132019.pdf (CVE-2018-12130)

  - A flaw was found in the Linux kernel's NFS41+ subsystem. NFS41+ shares mounted in different network     namespaces at the same time can make bc_svc_process() use wrong back-channel IDs and cause a use-after-     free vulnerability. Thus a malicious container user can cause a host kernel memory corruption and a system     panic. Due to the nature of the flaw, privilege escalation cannot be fully ruled out. (CVE-2018-16884)

  - Microarchitectural Data Sampling Uncacheable Memory (MDSUM): Uncacheable memory on some microprocessors     utilizing speculative execution may allow an authenticated user to potentially enable information     disclosure via a side channel with local access. A list of impacted products can be found here:
    https://www.intel.com/content/dam/www/public/us/en/documents/corporate-information/SA00233-microcode-     update-guidance_05132019.pdf (CVE-2019-11091)

  - The SCTP socket buffer used by a userspace application is not accounted by the cgroups subsystem. An     attacker can use this flaw to cause a denial of service attack. Kernel 3.10.x and 4.18.x branches are     believed to be vulnerable. (CVE-2019-3874)

  - A flaw was found in the Linux kernel's vfio interface implementation that permits violation of the user's     locked memory limit. If a device is bound to a vfio driver, such as vfio-pci, and the local attacker is     administratively granted ownership of the device, it may cause a system memory exhaustion and thus a     denial of service (DoS). Versions 3.10, 4.14 and 4.18 are vulnerable. (CVE-2019-3882)

  - A flaw was found in the way KVM hypervisor handled x2APIC Machine Specific Rregister (MSR) access with     nested(=1) virtualization enabled. In that, L1 guest could access L0's APIC register values via L2 guest,     when 'virtualize x2APIC mode' is enabled. A guest could use this flaw to potentially crash the host kernel     resulting in DoS issue. Kernel versions from 4.16 and newer are vulnerable to this issue. (CVE-2019-3887)

  - The Broadcom brcmfmac WiFi driver prior to commit 1b5e2423164b3670e8bc9174e4762d297990deff is vulnerable     to a heap buffer overflow. If the Wake-up on Wireless LAN functionality is configured, a malicious event     frame can be constructed to trigger an heap buffer overflow in the brcmf_wowl_nd_results function. This     vulnerability can be exploited with compromised chipsets to compromise the host, or when used in     combination with CVE-2019-9503, can be used remotely. In the worst case scenario, by sending specially-     crafted WiFi packets, a remote, unauthenticated attacker may be able to execute arbitrary code on a     vulnerable system. More typically, this vulnerability will result in denial-of-service conditions.
    (CVE-2019-9500)

  - The Broadcom brcmfmac WiFi driver prior to commit a4176ec356c73a46c07c181c6d04039fafa34a9f is vulnerable     to a frame validation bypass. If the brcmfmac driver receives a firmware event frame from a remote source,     the is_wlc_event_frame function will cause this frame to be discarded and unprocessed. If the driver     receives the firmware event frame from the host, the appropriate handler is called. This frame validation     can be bypassed if the bus used is USB (for instance by a wifi dongle). This can allow firmware event     frames from a remote source to be processed. In the worst case scenario, by sending specially-crafted WiFi     packets, a remote, unauthenticated attacker may be able to execute arbitrary code on a vulnerable system.
    More typically, this vulnerability will result in denial-of-service conditions. (CVE-2019-9503)

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-2019-2703 advisory.

  - In the Linux kernel through 4.19.6, a local user could exploit a use-after-free in the ALSA driver by     supplying a malicious USB Sound device (with zero interfaces) that is mishandled in usb_audio_probe in     sound/usb/card.c. (CVE-2018-19824)

  - The Broadcom brcmfmac WiFi driver prior to commit 1b5e2423164b3670e8bc9174e4762d297990deff is vulnerable     to a heap buffer overflow. If the Wake-up on Wireless LAN functionality is configured, a malicious event     frame can be constructed to trigger an heap buffer overflow in the brcmf_wowl_nd_results function. This     vulnerability can be exploited with compromised chipsets to compromise the host, or when used in     combination with CVE-2019-9503, can be used remotely. In the worst case scenario, by sending specially-     crafted WiFi packets, a remote, unauthenticated attacker may be able to execute arbitrary code on a     vulnerable system. More typically, this vulnerability will result in denial-of-service conditions.
    (CVE-2019-9500)

  - A flaw that allowed an attacker to corrupt memory and possibly escalate privileges was found in the     mwifiex kernel module while connecting to a malicious wireless network. (CVE-2019-3846)

  - The Broadcom brcmfmac WiFi driver prior to commit a4176ec356c73a46c07c181c6d04039fafa34a9f is vulnerable     to a frame validation bypass. If the brcmfmac driver receives a firmware event frame from a remote source,     the is_wlc_event_frame function will cause this frame to be discarded and unprocessed. If the driver     receives the firmware event frame from the host, the appropriate handler is called. This frame validation     can be bypassed if the bus used is USB (for instance by a wifi dongle). This can allow firmware event     frames from a remote source to be processed. In the worst case scenario, by sending specially-crafted WiFi     packets, a remote, unauthenticated attacker may be able to execute arbitrary code on a vulnerable system.
    More typically, this vulnerability will result in denial-of-service conditions. (CVE-2019-9503)

  - The Linux kernel before 5.1-rc5 allows page->_refcount reference count overflow, with resultant use-after-     free issues, if about 140 GiB of RAM exists. This is related to fs/fuse/dev.c, fs/pipe.c, fs/splice.c,     include/linux/mm.h, include/linux/pipe_fs_i.h, kernel/trace/trace.c, mm/gup.c, and mm/hugetlb.c. It can     occur with FUSE requests. (CVE-2019-11487)

  - A flaw was found in the way KVM hypervisor handled x2APIC Machine Specific Rregister (MSR) access with     nested(=1) virtualization enabled. In that, L1 guest could access L0's APIC register values via L2 guest,     when 'virtualize x2APIC mode' is enabled. A guest could use this flaw to potentially crash the host kernel     resulting in DoS issue. Kernel versions from 4.16 and newer are vulnerable to this issue. (CVE-2019-3887)

  - arch/powerpc/mm/mmu_context_book3s64.c in the Linux kernel before 5.1.15 for powerpc has a bug where     unrelated processes may be able to read/write to one another's virtual memory under certain conditions via     an mmap above 512 TB. Only a subset of powerpc systems are affected. (CVE-2019-12817)

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

An update of the linux package has been released.

An update for kernel is now available for Red Hat Enterprise Linux 8.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

The kernel packages contain the Linux kernel, the core of any Linux operating system.

Security Fix(es) :

* kernel: Heap overflow in mwifiex_update_bss_desc_with_ie function in marvell/mwifiex/scan.c (CVE-2019-3846)

* Kernel: KVM: nVMX: guest accesses L0 MSR causes potential DoS (CVE-2019-3887)

* kernel: brcmfmac heap buffer overflow in brcmf_wowl_nd_results (CVE-2019-9500)

* kernel: Count overflow in FUSE request leading to use-after-free issues. (CVE-2019-11487)

* kernel: ppc: unrelated processes being able to read/write to each other's virtual memory (CVE-2019-12817)

* kernel: Use-after-free in sound/usb/card.c:usb_audio_probe() (CVE-2018-19824)

* kernel: brcmfmac frame validation bypass (CVE-2019-9503)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Bug Fix(es) :

* [DELL EMC 8.0 BUG]: pciehp deadlock resulting in NVMe device not being recognized when hot plugged (BZ#1712261)

* Host crashed while try to boot a compatible guest attached huge page by'-object memory-backend-file *'[1G-P9] (BZ#1714758)

* Setting malformed authenc key will crash the system (BZ#1715335)

* BUG: memory allocation failure in inode_doinit_with_dentry()/context_to_sid () (BZ#1717780)

* [HPEMC 8.1 BUG] Protect against concurrent calls into UV BIOS (BZ#1724534)

* PHC jumping on I350 (igb) (BZ#1726352)

* aarch64 kernel missing vulnerabilities status files (BZ#1726353)

* BUG: KASAN: use-after-free in skb_release_data() (BZ#1726354)

* [RHEL8][PANIC][aarch64] kernel panic when loading the dme1737 module (BZ# 1726355)

* [RHEL8] [aarch64] Changes for BZ1672997 break kaslr (BZ#1726357)

* Network fails to come up when booting with kernel 3.10.0-862.el7.x86_64, several hung tasks can be seen in logs.
(BZ#1726358)

* [Intel] 'cpupower frequency-set' produces unexpected results for some processors (BZ#1726360)

* HDMI/DP audio: ELD not updated on hotplug event (BZ#1726361)

* [mlx5_core] CX5 Adapter works not as expected when MTU is 9000, Unable to handle kernel paging request at virtual address 3ae0aafeff4b6b5a (BZ# 1726372)

* [DELL 8.0 Bug] - hid-multitouch 0018:1FD2:8008.0001 ,lost function from S3 resume (BZ#1727098)

* [RHEL8.1 Pre Beta] [Power8] data corruption while returning from watchpoint exception handler (BZ#1733281)

* RHEL8.1 pre-Beta - cacheinfo code unsafe vs LPM (BZ#1733282)

* RHEL8.1 pre-Beta - [ZZ/Zeppelin] [kernel-4.18.0-100.el8.ppc64le] Hash MMU allows child to write parents process address space (BZ#1734689)

The remote CentOS Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the CESA-2019:2703 advisory.

  - kernel: Use-after-free in sound/usb/card.c:usb_audio_probe() (CVE-2018-19824)

  - kernel: Count overflow in FUSE request leading to use-after-free issues. (CVE-2019-11487)

  - kernel: ppc: unrelated processes being able to read/write to each other's virtual memory (CVE-2019-12817)

  - kernel: Heap overflow in mwifiex_update_bss_desc_with_ie function in marvell/mwifiex/scan.c     (CVE-2019-3846)

  - Kernel: KVM: nVMX: guest accesses L0 MSR causes potential DoS (CVE-2019-3887)

  - kernel: brcmfmac heap buffer overflow in brcmf_wowl_nd_results (CVE-2019-9500)

  - kernel: brcmfmac frame validation bypass (CVE-2019-9503)

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

An update for kernel-rt is now available for Red Hat Enterprise Linux 8.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements.

Security Fix(es) :

* kernel: Heap overflow in mwifiex_update_bss_desc_with_ie function in marvell/mwifiex/scan.c (CVE-2019-3846)

* Kernel: KVM: nVMX: guest accesses L0 MSR causes potential DoS (CVE-2019-3887)

* kernel: brcmfmac heap buffer overflow in brcmf_wowl_nd_results (CVE-2019-9500)

* kernel: Count overflow in FUSE request leading to use-after-free issues. (CVE-2019-11487)

* kernel: brcmfmac frame validation bypass (CVE-2019-9503)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Bug Fix(es) :

* BUG: scheduling while atomic in zswap (BZ#1726362)

* kernel-rt: update to the RHEL8.0.z batch#3 source tree (BZ#1734475)

ID	Name	Product	Family	Published	Updated	Severity
124043	Fedora 29 : kernel / kernel-headers / kernel-tools (2019-94dc902948)	Nessus	Fedora Local Security Checks	4/15/2019	1/23/2020	medium
125138	Ubuntu 19.04 : Linux kernel vulnerabilities (USN-3979-1) (MDSUM/RIDL) (MFBDS/RIDL/ZombieLoad) (MLPDS/RIDL) (MSBDS/Fallout)	Nessus	Ubuntu Local Security Checks	5/15/2019	5/11/2023	critical
124044	Fedora 28 : kernel / kernel-headers / kernel-tools (2019-ce2933b003)	Nessus	Fedora Local Security Checks	4/15/2019	1/23/2020	medium
125139	Ubuntu 18.10 : Linux kernel vulnerabilities (USN-3980-1) (MDSUM/RIDL) (MFBDS/RIDL/ZombieLoad) (MLPDS/RIDL) (MSBDS/Fallout)	Nessus	Ubuntu Local Security Checks	5/15/2019	5/11/2023	high
124520	Fedora 30 : kernel / kernel-headers / kernel-tools (2019-982b97f553)	Nessus	Fedora Local Security Checks	5/2/2019	1/21/2020	medium
125140	Ubuntu 18.04 LTS : Linux kernel (HWE) vulnerabilities (USN-3980-2)	Nessus	Ubuntu Local Security Checks	5/15/2019	1/9/2024	high
128845	Oracle Linux 8 : kernel (ELSA-2019-2703)	Nessus	Oracle Linux Local Security Checks	9/16/2019	9/8/2021	high
126115	Photon OS 3.0: Linux PHSA-2019-3.0-0015	Nessus	PhotonOS Local Security Checks	6/24/2019	6/26/2019	high
128665	RHEL 8 : kernel (RHSA-2019:2703)	Nessus	Red Hat Local Security Checks	9/11/2019	1/30/2020	high
145668	CentOS 8 : kernel (CESA-2019:2703)	Nessus	CentOS Local Security Checks	1/29/2021	1/25/2024	high
128859	RHEL 8 : kernel-rt (RHSA-2019:2741)	Nessus	Red Hat Local Security Checks	9/16/2019	12/27/2019	high

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