Out-of-bounds read in Linux kernel s390 crypto

1) Out-of-bounds read

EUVDB-ID: #VU91423

Risk: Low

CVSSv3.1: 4.8 [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-2023-52669

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

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

The vulnerability exists due to an out-of-bounds read error within the ctr_paes_crypt() function in arch/s390/crypto/paes_s390.c, within the ctr_aes_crypt() function in arch/s390/crypto/aes_s390.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

External links

http://git.kernel.org/stable/c/cd51e26a3b89706beec64f2d8296cfb1c34e0c79
http://git.kernel.org/stable/c/a7f580cdb42ec3d53bbb7c4e4335a98423703285
http://git.kernel.org/stable/c/dbc9a791a70ea47be9f2acf251700fe254a2ab23
http://git.kernel.org/stable/c/d68ac38895e84446848b7647ab9458d54cacba3e
http://git.kernel.org/stable/c/e78f1a43e72daf77705ad5b9946de66fc708b874
http://git.kernel.org/stable/c/d07f951903fa9922c375b8ab1ce81b18a0034e3b

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.