Buffer overflow in Linux kernel nfsd

1) Buffer overflow

EUVDB-ID: #VU94479

Risk: Low

CVSSv3.1: 4.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-48827

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to memory corruption within the nfsd4_encode_read() and nfsd4_encode_read_plus() functions in fs/nfsd/nfs4xdr.c, within the nfsd4_read() function in fs/nfsd/nfs4proc.c, within the nfsd3_proc_read() function in fs/nfsd/nfs3proc.c. A local user can perform a denial of service (DoS) attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: All versions

CPE2.3

External links

http://git.kernel.org/stable/c/1726a39b0879acfb490b22dca643f26f4f907da9
http://git.kernel.org/stable/c/c6eff5c4277146a78b4fb8c9b668dd64542c41b0
http://git.kernel.org/stable/c/44502aca8e02ab32d6b0eb52e006a5ec9402719b
http://git.kernel.org/stable/c/0cb4d23ae08c48f6bf3c29a8e5c4a74b8388b960

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.