Use of a Broken or Risky Cryptographic Algorithm The advisory has been revoked - it doesn't affect any version of package gnupg2 (opens in a new tab)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Start learning- Snyk IDSNYK-UBUNTU1904-GNUPG2-541611
- published25 Nov 2019
- disclosed20 Mar 2020
Introduced: 25 Nov 2019
CVE-2019-14855 (opens in a new tab)Amendment
The Ubuntu security team deemed this advisory irrelevant for Ubuntu:19.04.
NVD Description
Note: Versions mentioned in the description apply only to the upstream gnupg2 package and not the gnupg2 package as distributed by Ubuntu.
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. This issue affects GnuPG versions before 2.2.18.
References
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2019-14855
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-14855
- https://security-tracker.debian.org/tracker/CVE-2019-14855
- https://dev.gnupg.org/T4755
- https://lists.gnupg.org/pipermail/gnupg-announce/2019q4/000442.html
- https://rwc.iacr.org/2020/slides/Leurent.pdf
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-14855
- https://usn.ubuntu.com/4516-1/