CVE-2020-8945

Exp

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.

Published: 2020-02-12 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2020-8945 is rated High Exploit Risk (79.8/100): CVSS High severity, with high exploitation likelihood (EPSS 4.93%, 91th percentile). 1 public exploit reference(s) are indexed (Exploit-DB). EPSS rose +3.00% over the last day, indicating growing attacker interest. Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2020-8945

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2020-8945

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 1.94% 4.93% +3.00%
2 2026-03-17 1.97% 1.94% -0.03%
3 2026-03-04 — 1.97% —

Full EPSS history (29 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2020-8945

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.6 5.9 [email protected]
5.1 2.0 MEDIUM
AV:N/AC:H/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:H)
Exploitation requires uncommon or highly specific conditions.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 4.9 6.4 [email protected]

Weakness enumeration for CVE-2020-8945

GitHub Security Advisory for CVE-2020-8945

GHSA-m6wg-2mwg-4rfq · Severity: high · Ecosystem: go — GPGME Go wrapper contains Use After Free

OS Trackers for CVE-2020-8945

vendor priority summary link
debian not yet assigned CVE-2020-8945 not yet assigned priority: Debian including 1 source packages (golang-github-proglottis-gpgme), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2020-8945
redhat medium — https://access.redhat.com/security/cve/CVE-2020-8945
ubuntu medium CVE-2020-8945 medium priority: Ubuntu including 2 source packages (golang-github-proglottis-gpgme, singularity-container), 34 status rows across 17 suites (bionic, eoan, focal, groovy, hirsute, impish, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): DNE 13, not-affected 11, ignored 4, needs-triage 4, needed 1, released 1. https://ubuntu.com/security/CVE-2020-8945

Affected software / configurations for CVE-2020-8945

Vendor Product Version Raw CPE
gpgme_project gpgme < 0.1.1 cpe:2.3:a:gpgme_project:gpgme:*:*:*:*:*:go:*:*
redhat openshift_container_platform 3.11 cpe:2.3:a:redhat:openshift_container_platform:3.11:*:*:*:*:*:*:*
redhat openshift_container_platform 4.1 cpe:2.3:a:redhat:openshift_container_platform:4.1:*:*:*:*:*:*:*
redhat openshift_container_platform 4.2 cpe:2.3:a:redhat:openshift_container_platform:4.2:*:*:*:*:*:*:*
redhat openshift_container_platform 4.3 cpe:2.3:a:redhat:openshift_container_platform:4.3:*:*:*:*:*:*:*
redhat openshift_container_platform 4.4 cpe:2.3:a:redhat:openshift_container_platform:4.4:*:*:*:*:*:*:*
redhat openshift_container_platform 4.5 cpe:2.3:a:redhat:openshift_container_platform:4.5:*:*:*:*:*:*:*
redhat openshift_container_platform_for_ibm_z 4.1 cpe:2.3:a:redhat:openshift_container_platform_for_ibm_z:4.1:*:*:*:*:*:*:*
redhat openshift_container_platform_for_ibm_z 4.2 cpe:2.3:a:redhat:openshift_container_platform_for_ibm_z:4.2:*:*:*:*:*:*:*
redhat openshift_container_platform_for_linuxone 4.1 cpe:2.3:a:redhat:openshift_container_platform_for_linuxone:4.1:*:*:*:*:*:*:*
redhat openshift_container_platform_for_linuxone 4.2 cpe:2.3:a:redhat:openshift_container_platform_for_linuxone:4.2:*:*:*:*:*:*:*
fedoraproject fedora 30 cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:*
fedoraproject fedora 31 cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*
fedoraproject fedora 32 cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*
redhat enterprise_linux_for_ibm_z_systems 7.0 cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems:7.0:*:*:*:*:*:*:*
redhat enterprise_linux_for_power_little_endian 7.0 cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian:7.0:*:*:*:*:*:*:*
redhat enterprise_linux_server 7.0 cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:*
redhat enterprise_linux_workstation 7.0 cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:*

References for CVE-2020-8945

URL Tags
https://access.redhat.com/errata/RHSA-2020:0679 Third Party Advisory
https://access.redhat.com/errata/RHSA-2020:0689 Third Party Advisory
https://access.redhat.com/errata/RHSA-2020:0697 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1795838 Issue Tracking Patch Third Party Advisory
https://github.com/containers/image/commit/4c7a23f82ef09127b0ff28366d1cf31316dd6cc1 Patch Third Party Advisory
https://github.com/proglottis/gpgme/compare/v0.1.0...v0.1.1 Patch Third Party Advisory
https://github.com/proglottis/gpgme/pull/23 Exploit Patch Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3SOCLOPTSYABTE4CLTSPDIFE6ZZZR4LX/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/H6P6SSNKN4H6GSEVROHBDXA64PX7EOED/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KDBT77KV3U7BESJX3P4S4MPVDGRTAQA2/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WXV7NZELYWRRCXATXU3FYD3G3WJT3WYM/
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