Huawei EulerOS: Security Advisory for kernel (EulerOS-SA-2020-2514)

Published: 2020-12-15 07:18:08
CVE Author: NIST National Vulnerability Database

CVSS Base Vector:
AV:L/AC:M/Au:N/C:C/I:C/A:C

Summary:
The remote host is missing an update for the Huawei EulerOS 'kernel' Linux Distribution Package(s) announced via the EulerOS-SA-2020-2514 advisory.

Detection Method:
Checks if a vulnerable Linux Distribution Package version is present on the target host.

Technical Details:
An issue was discovered in __split_huge_pmd in mm/huge_memory.c in the Linux kernel before 5.7.5. The copy-on-write implementation can grant unintended write access because of a race condition in a THP mapcount check, aka CID-c444eb564fb1.(CVE-2020-29368) An issue was discovered in kmem_cache_alloc_bulk in mm/slub.c in the Linux kernel before 5.5.11. The slowpath lacks the required TID increment, aka CID-fd4d9c7d0c71.(CVE-2020-29370) An issue was discovered in romfs_dev_read in fs/romfs/storage.c in the Linux kernel before 5.8.4. Uninitialized memory leaks to userspace, aka CID-bcf85fcedfdd.(CVE-2020-29371) An issue was discovered in the Linux kernel before 5.7.3, related to mm/gup.c and mm/huge_memory.c. The get_user_pages (aka gup) implementation, when used for a copy-on-write page, does not properly consider the semantics of read operations and therefore can grant unintended write access, aka CID-17839856fd58.(CVE-2020-29374) An issue was discovered in the Linux kernel before 5.2.6. On NUMA systems, the Linux fair scheduler has a use-after-free in show_numa_stats() because NUMA fault statistics are inappropriately freed, aka CID-16d51a590a8c.(CVE-2019-20934) kernel:use-after-free read in sunkbd_reinit in drivers/input/keyboard/sunkbd.c(CVE-2020-25669) A buffer over-read (at the framebuffer layer) in the fbcon code in the Linux kernel before 5.8.15 could be used by local attackers to read kernel memory, aka CID-6735b4632def.(CVE-2020-28915) IBM Power9 (AIX 7.1, 7.2, and VIOS 3.1) processors could allow a local user to obtain sensitive information from the data in the L1 cache under extenuating circumstances. IBM X-Force ID: 189296.(CVE-2020-4788) kernel: powerpc: RTAS calls can be used to compromise kernel integrity(CVE-2020-27777) There is a use-after-free in kernel versions before 5.5 due to a race condition between the release of ptp_clock and cdev while resource deallocation. When a (high privileged) process allocates a ptp device file (like /dev/ptpX) and voluntarily goes to sleep. During this time if the underlying device is removed, it can cause an exploitable condition as the process wakes up to terminate and clean all attached files. The system crashes due to the cdev structure being invalid (as already freed) which is pointed to by the inode.(CVE-2020-10690) An issue was discovered in the Linux kernel through 5.9.1, as used with Xen through 4.14.x. Guest OS users can cause a denial of service (host OS hang) via a high rate of events to dom0, aka CID-e99502f76271.(CVE-2020-27673) An issue was discovered in the Linux kernel through 5.9.1, as used with Xen through 4.14.x ... Description truncated. Please see the references for more information.

Affected Versions:
'kernel' Linux Distribution Package(s) on Huawei EulerOS V2.0SP8.

Recommendations:
Please install the updated Linux Distribution Package(s).

Solution Type:
Vendor Patch

Detection Type:
Linux Distribution Package

NIST (National Institute of Standards and Technology) NVD (National Vulnerability Database)

https://nvd.nist.gov/vuln/detail/CVE-2019-20934
https://nvd.nist.gov/vuln/detail/CVE-2020-0431
https://nvd.nist.gov/vuln/detail/CVE-2020-10690
https://nvd.nist.gov/vuln/detail/CVE-2020-25656
https://nvd.nist.gov/vuln/detail/CVE-2020-25668
https://nvd.nist.gov/vuln/detail/CVE-2020-25669
https://nvd.nist.gov/vuln/detail/CVE-2020-25704
https://nvd.nist.gov/vuln/detail/CVE-2020-25705
https://nvd.nist.gov/vuln/detail/CVE-2020-27673
https://nvd.nist.gov/vuln/detail/CVE-2020-27675
https://nvd.nist.gov/vuln/detail/CVE-2020-27777
https://nvd.nist.gov/vuln/detail/CVE-2020-28915
https://nvd.nist.gov/vuln/detail/CVE-2020-28974
https://nvd.nist.gov/vuln/detail/CVE-2020-29368
https://nvd.nist.gov/vuln/detail/CVE-2020-29370
https://nvd.nist.gov/vuln/detail/CVE-2020-29371
https://nvd.nist.gov/vuln/detail/CVE-2020-29374
https://nvd.nist.gov/vuln/detail/CVE-2020-4788
https://nvd.nist.gov/vuln/detail/CVE-2020-8694

References:


https://developer.huaweicloud.com/ict/en/site-euleros/euleros/security-advisories/EulerOS-SA-2020-2514

Severity
Medium
CVSS Score
6.9
Published
2020-12-15
Modified
2020-12-15
Category
Huawei EulerOS Local Security Checks

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