PT-2019-6323 · Gnu+4 · Gnupg+4

Published 2019-11-11 · Updated 2026-01-30 · CVE-2019-14855

Positive Technologies (AI Summary)

CVSS v2.0

7.8

High

Base vector

AV:N/AC:L/Au:N/C:C/I:N/A:N

Name of the Vulnerable Software and Affected Versions GnuPG versions prior to 2.2.18

Description A flaw was found in the way certificate signatures could be forged using collisions found in the SHA-1 algorithm. An attacker could use this weakness to create forged certificate signatures. The issue is related to the use of weak encryption, which could allow a remote attacker to access confidential data.

Recommendations For GnuPG versions prior to 2.2.18, update to version 2.2.18 or later to resolve the issue. As a temporary workaround, consider restricting the use of certificate signatures until a patch is available. Avoid using the SHA-1 algorithm for certificate signatures in the affected versions.

Exploit

Fix

Inadequate Encryption Strength

Weakness Enumeration

CWE-326

Related Identifiers

ALT-PU-2019-3255

ALT-PU-2020-3344

ALT-PU-2020-3403

BDU:2023-01658

CLEANSTART-2026-HT23337

CVE-2019-14855

MGASA-2019-0348

OPENSUSE-SU-2024:10815-1

USN-4516-1

Affected Products

Alt Linux

Astra Linux

Debian

Gnupg

Ubuntu

References · 38

• 🔥 https://rwc.iacr.org/2020/slides/Leurent.pdf · Exploit
• https://advisories.mageia.org/MGASA-2019-0348.html · Security Note
• https://osv.dev/vulnerability/CLEANSTART-2026-HT23337 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2019-14855 · Vendor Advisory
• https://osv.dev/vulnerability/ALPINE-CVE-2019-14855 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2024:10815-1 · Vendor Advisory
• https://dev.gnupg.org/T4755 · Vendor Advisory
• https://osv.dev/vulnerability/MGASA-2019-0348 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2019-14855 · Security Note
• https://osv.dev/vulnerability/USN-4516-1 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2019-14855 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2019-14855 · Vendor Advisory
• https://usn.ubuntu.com/4516-1 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2019-14855 · Vendor Advisory
• https://ubuntu.com/security/CVE-2019-14855 · Vendor Advisory