Information disclosure in Linux kernel f2fs

1) Information disclosure

EUVDB-ID: #VU87592

Risk: Low

CVSSv3.1: 2.2 [CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-52436

CWE-ID: CWE-200 - Information exposure

Exploit availability: No

Description

The vulnerability allows a local user to gain access to potentially sensitive information.

The vulnerability exists due to the __f2fs_setxattr() function in fs/f2fs/xattr.c, does not empty by default the unused space in the xattr list. A local user can gain access to potentially sensitive information.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Linux kernel: All versions

External links

http://git.kernel.org/stable/c/16ae3132ff7746894894927c1892493693b89135
http://git.kernel.org/stable/c/12cf91e23b126718a96b914f949f2cdfeadc7b2a
http://git.kernel.org/stable/c/3e47740091b05ac8d7836a33afd8646b6863ca52
http://git.kernel.org/stable/c/32a6cfc67675ee96fe107aeed5af9776fec63f11
http://git.kernel.org/stable/c/5de9e9dd1828db9b8b962f7ca42548bd596deb8a
http://git.kernel.org/stable/c/2525d1ba225b5c167162fa344013c408e8b4de36
http://git.kernel.org/stable/c/f6c30bfe5a49bc38cae985083a11016800708fea
http://git.kernel.org/stable/c/e26b6d39270f5eab0087453d9b544189a38c8564

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.