CVE-2021-3345

HIGH
Published Jan 29, 20215y ago · Modified Jun 17, 20262w ago
7.8 CVSS 3.1
High
Find Similar
Published Jan 29, 2021 5y ago
Last Modified Jun 17, 2026 2w ago

Description

_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.

CVSS Details

Base Score
7.8
Exploitability
1.8
Impact
5.9
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

No active exploitation signals — not in CISA KEV and no EPSS score yet.

Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-787 Out-of-bounds Write Memory Safety

Affected Products 2

VendorProductVersionRange
gnupglibgcrypt1.9.0any
oraclecommunications_billing_and_revenue_management12.0.0.3.0any

References 6

  • bugs.gentoo.org https://bugs.gentoo.org/show_bug.cgi?id=767814
    Issue TrackingVendor Advisory
  • git.gnupg.org https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git%3Ba=commit%3Bh=512c0c75276949f13b6373b5c04f7065af750b08
  • gnupg.org https://gnupg.org
    Vendor Advisory
  • lists.gnupg.org https://lists.gnupg.org/pipermail/gnupg-announce/2021q1/000455.html
    Mailing ListVendor Advisory
  • lists.gnupg.org https://lists.gnupg.org/pipermail/gnupg-announce/2021q1/000456.html
    Mailing ListPatchVendor Advisory
  • oracle.com https://www.oracle.com//security-alerts/cpujul2021.html
    Third Party Advisory

Remediation

  • lists.gnupg.org https://lists.gnupg.org/pipermail/gnupg-announce/2021q1/000456.html
    Mailing ListPatchVendor Advisory