CVE-2020-8945 — Vulnetix

CVE-2020-8945 PUBLISHED

The proglottis Go wrapper before 0.1.1 for the GPGME library has a use-after-free, as demonstrated by use for container image pulls by Docker or CRI-O. This leads to a crash or potential code execution during GPG signature verification.

EPSS 1.94% · 83.8th percentile

Risk Scores

EPSS Score

1.94%

83.8th percentile

Affected Products

Vendor	Product	Versions
Ubuntu:Pro:18.04:LTS	singularity-container	2.3.1-2, 2.4.2-2, 0
Ubuntu:25.10	singularity-container	0, *
Ubuntu:20.04:LTS	golang-github-proglottis-gpgme	*, 0, 0.0~git20190226.8e0937a-1
Ubuntu:Pro:24.04:LTS	singularity-container	4.1.1+ds2-1ubuntu0.2+esm1, 4.1.1+ds2-1ubuntu0.2, 4.1.1+ds2-1ubuntu0.1

Exploit Intelligence

CIRCL seen: CVE-2020-8945 (circl-sighting)
https://github.com/proglottis/gpgme/pull/23 (circl)
https://bugzilla.redhat.com/show_bug.cgi?id=1795838 (circl)
https://github.com/proglottis/gpgme/compare/v0.1.0...v0.1.1 (circl)
https://github.com/containers/image/commit/4c7a23f82ef09127b0ff28366d1cf31316dd6cc1 (circl)
FEDORA-2020-f317e13ecf (circl)
FEDORA-2020-2a0aac3502 (circl)
FEDORA-2020-ccc3e64ea5 (circl)
RHSA-2020:0679 (circl)
RHSA-2020:0689 (circl)

…and 2 more exploits

Timeline

Feb 12, 2020 CVE Published
Apr 14, 2021 EPSS Score
Aug 24, 2021 EPSS Score
Oct 26, 2021 EPSS Score
Jan 6, 2022 EPSS Score
Feb 4, 2022 EPSS Score
Apr 1, 2022 EPSS Score
May 1, 2022 EPSS Score
Sep 2, 2022 PoC Published
Sep 4, 2022 EPSS Score
Nov 6, 2022 EPSS Score
Mar 7, 2023 EPSS Score

References

https://ubuntu.com/security/CVE-2020-8945 third-party-advisory
https://github.com/proglottis/gpgme/pull/23 third-party-advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1795838 third-party-advisory
https://github.com/containers/image/commit/4c7a23f82ef09127b0ff28366d1cf31316dd6cc1 third-party-advisory
https://github.com/proglottis/gpgme/compare/v0.1.0...v0.1.1 third-party-advisory
https://www.cve.org/CVERecord?id=CVE-2020-8945 third-party-advisory

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