SB2022070654 - Anolis OS update for kernel(RHCK)4.18

Description

This security bulletin contains information about 2 vulnerabilities.

1) Buffer Over-read (CVE-ID: CVE-2020-28915)

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

CVSSv4: 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

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.

2) Heap-based buffer overflow (CVE-ID: CVE-2022-27666)

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

CVSSv4: 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

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.

Remediation

Install update from vendor's website.

References

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