Improper Verification of Cryptographic Signature The advisory has been revoked - it doesn't affect any version of package libjcat (opens in a new tab)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-UBUNTU2010-LIBJCAT-1030027
- published7 Jun 2020
- disclosed15 Sept 2020
Introduced: 7 Jun 2020
CVE-2020-10759 (opens in a new tab)Amendment
The Ubuntu security team deemed this advisory irrelevant for Ubuntu:20.10.
NVD Description
Note: Versions mentioned in the description apply only to the upstream libjcat package and not the libjcat package as distributed by Ubuntu.
A PGP signature bypass flaw was found in fwupd (all versions), which could lead to the installation of unsigned firmware. As per upstream, a signature bypass is theoretically possible, but not practical because the Linux Vendor Firmware Service (LVFS) is either not implemented or enabled in versions of fwupd shipped with Red Hat Enterprise Linux 7 and 8. The highest threat from this vulnerability is to confidentiality and integrity.
References
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2020-10759
- https://security-tracker.debian.org/tracker/CVE-2020-10759
- https://bugzilla.redhat.com/show_bug.cgi?id=1844316
- https://github.com/justinsteven/advisories/blob/master/2020_fwupd_dangling_s3_bucket_and_CVE-2020-10759_signature_verification_bypass.md
- https://access.redhat.com/errata/RHSA-2020:4436
- https://access.redhat.com/security/cve/CVE-2020-10759