Buffer overflow in Gnupg Libgcrypt
CVE-2021-3345
_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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.011 (64.3th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 64th percentile — 64.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000
Affected products
- Gnupg Libgcrypt — versions 1.9.0
- Oracle Communications Billing And Revenue Management — versions 12.0.0.3.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- git.gnupg.org/cgi-bin/gitweb.cgi
- lists.gnupg.org/pipermail/gnupg-announce/2021q1/000455.html (Mailing List, Vendor Advisory)
- lists.gnupg.org/pipermail/gnupg-announce/2021q1/000456.html (Patch, Mailing List, Vendor Advisory)
- gnupg.org (Vendor Advisory)
- bugs.gentoo.org/show_bug.cgi (Issue Tracking, Vendor Advisory)
- www.oracle.com//security-alerts/cpujul2021.html (Third Party Advisory)
Frequently asked questions
- What is CVE-2021-3345?
- CVE-2021-3345 is a high-severity vulnerability in Gnupg Libgcrypt, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2021-01-29.
- How severe is CVE-2021-3345?
- High severity. CVSS v3 base score is 7.8 out of 10.
- Is CVE-2021-3345 known to be exploited?
- 15 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.