MGASA-2020-0089 - Updated kernel-linus packages fix security vulnerabilities

Publication date: 18 Feb 2020
URL: https://advisories.mageia.org/MGASA-2020-0089.html
Type: security
Affected Mageia releases: 7
CVE: CVE-2019-3016,
     CVE-2019-14615,
     CVE-2019-14895,
     CVE-2019-14896,
     CVE-2019-14897,
     CVE-2019-19037,
     CVE-2019-19332,
     CVE-2020-8428

This update provides upstream 5.4.20, adding support for new hardware
and features, and resolves atleast the following security issues:

In a Linux KVM guest that has PV TLB enabled, a process in the guest kernel
may be able to read memory locations from another process in the same guest.
This problem is limit to the host running linux kernel 4.10 with a guest
running linux kernel 4.16 or later. The problem mainly affects AMD
processors but Intel CPUs cannot be ruled out (CVE-2019-3016).

Intel GPU Hardware prior to Gen11 does not clear EU state during a
context switch. This can result in information leakage between
contexts (CVE-2019-14615).

A heap-based buffer overflow was discovered in the Marvell WiFi chip
driver. The flaw could occur when the station attempts a connection
negotiation during the handling of the remote devices country settings.
This could allow the remote device to cause a denial of service (system
crash) or possibly execute arbitrary code (CVE-2019-14895).

A heap-based buffer overflow vulnerability was found in the Linux kernel,
in Marvell WiFi chip driver. A remote attacker could cause a denial of
service (system crash) or, possibly execute arbitrary code, when the
lbs_ibss_join_existing function is called after a STA connects to an AP
(CVE-2019-14896).

A stack-based buffer overflow was found in the Linux kernel, in Marvell
WiFi chip driver. An attacker is able to cause a denial of service
(system crash) or, possibly execute arbitrary code, when a STA works in
IBSS mode (allows connecting stations together without the use of an AP)
and connects to another STA (CVE-2019-14897).

ext4_empty_dir in fs/ext4/namei.c in the Linux kernel through 5.3.12 allows
a NULL pointer dereference because ext4_read_dirblock(inode,0,DIRENT_HTREE)
can be zero. (CVE-2019-19037)

KVM: x86: fix out-of-bounds write in KVM_GET_EMULATED_CPUID
(CVE-2019-19332)

fs/namei.c in the Linux kernel before 5.5 has a may_create_in_sticky
use-after-free, which allows local users to cause a denial of service
(OOPS) or possibly obtain sensitive information from kernel memory, aka
CID-d0cb50185ae9. One attack vector may be an open system call for a UNIX
domain socket, if the socket is being moved to a new parent directory and
its old parent directory is being removed (CVE-2020-8428).

References:
- https://bugs.mageia.org/show_bug.cgi?id=26099
- https://kernelnewbies.org/Linux_5.4
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.1
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.2
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.3
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.4
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.5
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.6
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.7
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.8
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.9
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.10
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.11
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.12
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.13
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.14
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.15
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.16
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.17
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.18
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.19
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.20
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-3016
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-14615
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-14895
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-14896
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-14897
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-19037
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-19332
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-8428

SRPMS:
- 7/core/kernel-linus-5.4.20-1.mga7