Timing attack in libgcrypt

1) Cryptographic issues

EUVDB-ID: #VU24721

Risk: Low

CVSSv4.0: 1.7 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2019-13627

CWE-ID: CWE-310 - Cryptographic Issues

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform timing attack.

The vulnerability exists due to an error within the libgcrypt20 cryptographic library. A remote attacker can perform ECDSA timing attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Libgcrypt: 1.6.0 - 1.8.4

CPE2.3

• cpe:2.3:a:gnu:libgcrypt:1.6.0:*:*:*:*:*:*:*
• cpe:2.3:a:gnu:libgcrypt:1.6.1:*:*:*:*:*:*:*
• cpe:2.3:a:gnu:libgcrypt:1.6.2:*:*:*:*:*:*:*

External links

https://lists.opensuse.org/opensuse-security-announce/2019-09/msg00060.html
https://www.openwall.com/lists/oss-security/2019/10/02/2
https://github.com/gpg/libgcrypt/releases/tag/libgcrypt-1.8.5
https://lists.debian.org/debian-lts-announce/2019/09/msg00024.html
https://minerva.crocs.fi.muni.cz/
https://security-tracker.debian.org/tracker/CVE-2019-13627

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.