Covert Timing Channel The advisory has been revoked - it doesn't affect any version of package libgcrypt20 (opens in a new tab)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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Test your applications- Snyk IDSNYK-UBUNTU2504-LIBGCRYPT20-9794004
- published23 Apr 2025
- disclosed6 Mar 2024
Introduced: 6 Mar 2024
CVE-2024-2236 (opens in a new tab)Amendment
The Ubuntu security team deemed this advisory irrelevant for Ubuntu:25.04.
NVD Description
Note: Versions mentioned in the description apply only to the upstream libgcrypt20 package and not the libgcrypt20 package as distributed by Ubuntu.
A timing-based side-channel flaw was found in libgcrypt's RSA implementation. This issue may allow a remote attacker to initiate a Bleichenbacher-style attack, which can lead to the decryption of RSA ciphertexts.
References
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2024-2236
- https://access.redhat.com/errata/RHSA-2024:9404
- https://bugzilla.redhat.com/show_bug.cgi?id=2268268
- https://access.redhat.com/errata/RHSA-2025:3534
- https://access.redhat.com/errata/RHSA-2025:3530
- https://access.redhat.com/security/cve/CVE-2024-2236
- https://bugzilla.redhat.com/show_bug.cgi?id=2245218
- https://cert-portal.siemens.com/productcert/html/ssa-398330.html