#VU74627 Buffer overflow in Linux kernel - CVE-2023-28772

Vulnerability identifier: #VU74627

Vulnerability risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2023-28772

CWE-ID: CWE-119

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Linux kernel
Operating systems & Components / Operating system

Vendor: Linux Foundation

Description

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

The vulnerability exists due to a boundary error within the seq_buf_putmem_hex() function in lib/seq_buf.c. A local user can trigger memory corruption and execute arbitrary code with elevated privileges.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Linux kernel: before 5.13.3, 5.13.3

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External links
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13.3
https://github.com/torvalds/linux/commit/d3b16034a24a112bb83aeb669ac5b9b01f744bb7
https://lkml.kernel.org/r/20210626032156.47889-1-yun.zhou@windriver.com
https://lore.kernel.org/lkml/20210625122453.5e2fe304@oasis.local.home/

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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.