CVE-2021-3345

moderate-risk
Published 2021-01-29

_gcry_md_block_write in cipher/hash-common.c in Libgcrypt version 1.9.0 has a heap-based buffer overflow when the digest final function sets a large count value. It is recommended to upgrade to 1.9.1 or later.

Do I need to act?

~
5.7% chance of exploitation in next 30 days
EPSS score — moderate exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
7
CVSS 7.8/10 High
LOCAL / LOW complexity

Affected Products (2)

Libgcrypt

Affected Vendors

Oracle Gnupg

References (12)

Issue Tracking https://bugs.gentoo.org/show_bug.cgi?id=767814
https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git%3Ba=commit%3Bh=512c0c75...
Vendor Advisory https://gnupg.org
Mailing List https://lists.gnupg.org/pipermail/gnupg-announce/2021q1/000455.html
Mailing List https://lists.gnupg.org/pipermail/gnupg-announce/2021q1/000456.html
Third Party Advisory https://www.oracle.com//security-alerts/cpujul2021.html
Issue Tracking https://bugs.gentoo.org/show_bug.cgi?id=767814
https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git%3Ba=commit%3Bh=512c0c75...
Vendor Advisory https://gnupg.org
Mailing List https://lists.gnupg.org/pipermail/gnupg-announce/2021q1/000455.html
Mailing List https://lists.gnupg.org/pipermail/gnupg-announce/2021q1/000456.html
Third Party Advisory https://www.oracle.com//security-alerts/cpujul2021.html
40
/ 100
moderate-risk
Severity 24/34 · High
Exploitability 9/34 · Low
Exposure 7/34 · Low