Timing side-channel attack in libgcrypt

1) Information Exposure Through Timing Discrepancy

EUVDB-ID: #VU87339

Risk: Medium

CVSSv3.1: 6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N/E:U/RL:U/RC:C]

CVE-ID: CVE-2024-2236

CWE-ID: CWE-208 - Information Exposure Through Timing Discrepancy

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform timing attack.

The vulnerability exists due to an error in libgcrypt's RSA implementation. A remote attacker can initiate a Bleichenbacher-style attack, which can lead to the decryption of RSA ciphertexts.

Mitigation

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

Libgcrypt: 1.2.3 - 1.10.3

External links

http://access.redhat.com/security/cve/CVE-2024-2236
http://bugzilla.redhat.com/show_bug.cgi?id=2268268

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.