Vulnerability identifier: #VU56684

Vulnerability risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-33560

CWE-ID: CWE-203

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Libgcrypt
Client/Desktop applications / Encryption software

Vendor: GNU

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to observable discrepancy. A remote attacker can gain unauthorized access to sensitive information on the system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Libgcrypt: 1.8.0 - 1.9.2

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External links
http://dev.gnupg.org/T5466
http://dev.gnupg.org/rCe8b7f10be275bcedb5fc05ed4837a89bfd605c61
http://dev.gnupg.org/T5305
http://dev.gnupg.org/T5328
http://lists.debian.org/debian-lts-announce/2021/06/msg00021.html
http://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/R7OAPCUGPF3VLA7QAJUQSL255D4ITVTL/
http://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/BKKTOIGFW2SGN3DO2UHHVZ7MJSYN4AAB/

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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.