Anolis OS update for kernel(RHCK)4.18

Published: 2022-07-06 | Updated: 2025-03-28

Risk	Low
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2020-28915 CVE-2022-27666
CWE-ID	CWE-126 CWE-122
Exploitation vector	Local
Public exploit	Public exploit code for vulnerability #2 is available.
Vulnerable software	Anolis OS Operating systems & Components / Operating system kernel-doc Operating systems & Components / Operating system package or component kernel-abi-stablelists Operating systems & Components / Operating system package or component python3-perf Operating systems & Components / Operating system package or component perf Operating systems & Components / Operating system package or component kernel-tools-libs Operating systems & Components / Operating system package or component kernel-tools Operating systems & Components / Operating system package or component kernel-modules-extra Operating systems & Components / Operating system package or component kernel-modules Operating systems & Components / Operating system package or component kernel-headers Operating systems & Components / Operating system package or component kernel-devel Operating systems & Components / Operating system package or component kernel-debug-modules-extra Operating systems & Components / Operating system package or component kernel-debug-modules Operating systems & Components / Operating system package or component kernel-debug-devel Operating systems & Components / Operating system package or component kernel-debug-core Operating systems & Components / Operating system package or component kernel-debug Operating systems & Components / Operating system package or component kernel-cross-headers Operating systems & Components / Operating system package or component kernel-core Operating systems & Components / Operating system package or component kernel Operating systems & Components / Operating system package or component bpftool Operating systems & Components / Operating system package or component
Vendor	OpenAnolis

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Buffer Over-read

EUVDB-ID: #VU64793

Risk: Low

CVSSv4.0: 1.9 [CVSS:4.0/AV:P/AC:L/AT:N/PR:H/UI:N/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2020-28915

CWE-ID: CWE-126 - Buffer over-read

Exploit availability: No

Description

The vulnerability allows a local user with physical access to perform a denial of service attack.

The vulnerability exists due to an out-of-bounds (OOB) memory access flaw in fbcon_get_font() function in drivers/video/fbdev/core/fbcon.c in fbcon driver module in the Linux kernel. A local user with special user privilege and with physical access can gain access to out-of-bounds memory, leading to a system crash or a leak of internal kernel information.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

Anolis OS: 8

kernel-doc: before 4.18.0-372.13.1

kernel-abi-stablelists: before 4.18.0-372.13.1

python3-perf: before 4.18.0-372.13.1

perf: before 4.18.0-372.13.1

kernel-tools-libs: before 4.18.0-372.13.1

kernel-tools: before 4.18.0-372.13.1

kernel-modules-extra: before 4.18.0-372.13.1

kernel-modules: before 4.18.0-372.13.1

kernel-headers: before 4.18.0-372.13.1

kernel-devel: before 4.18.0-372.13.1

kernel-debug-modules-extra: before 4.18.0-372.13.1

kernel-debug-modules: before 4.18.0-372.13.1

kernel-debug-devel: before 4.18.0-372.13.1

kernel-debug-core: before 4.18.0-372.13.1

kernel-debug: before 4.18.0-372.13.1

kernel-cross-headers: before 4.18.0-372.13.1

kernel-core: before 4.18.0-372.13.1

kernel: before 4.18.0-372.13.1

bpftool: before 4.18.0-372.13.1

CPE2.3

External links

https://anas.openanolis.cn/errata/detail/ANSA-2022:0546

Q & A

Can this vulnerability be exploited remotely?

No. The attacker should have physical access to the system in order to successfully exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Heap-based buffer overflow

EUVDB-ID: #VU61672

Risk: Low

CVSSv4.0: 6.4 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Clear]

CVE-ID: CVE-2022-27666

CWE-ID: CWE-122 - Heap-based Buffer Overflow

Exploit availability: Yes

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a boundary error within IPsec ESP transformation code in net/ipv4/esp4.c and net/ipv6/esp6.c in Linux kernel. A local unprivileged user can pass specially crafted data to the system, trigger a heap-based buffer overflow and execute arbitrary code with elevated privileges.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

Anolis OS: 8

kernel-doc: before 4.18.0-372.13.1

kernel-abi-stablelists: before 4.18.0-372.13.1

python3-perf: before 4.18.0-372.13.1

perf: before 4.18.0-372.13.1

kernel-tools-libs: before 4.18.0-372.13.1

kernel-tools: before 4.18.0-372.13.1

kernel-modules-extra: before 4.18.0-372.13.1

kernel-modules: before 4.18.0-372.13.1

kernel-headers: before 4.18.0-372.13.1

kernel-devel: before 4.18.0-372.13.1

kernel-debug-modules-extra: before 4.18.0-372.13.1

kernel-debug-modules: before 4.18.0-372.13.1

kernel-debug-devel: before 4.18.0-372.13.1

kernel-debug-core: before 4.18.0-372.13.1

kernel-debug: before 4.18.0-372.13.1

kernel-cross-headers: before 4.18.0-372.13.1

kernel-core: before 4.18.0-372.13.1

kernel: before 4.18.0-372.13.1

bpftool: before 4.18.0-372.13.1

CPE2.3

External links

https://anas.openanolis.cn/errata/detail/ANSA-2022:0546

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.