Vulnerability Details : CVE-2020-8945
Potential exploit
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.
Vulnerability category: Memory Corruption
Products affected by CVE-2020-8945
- cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian:7.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems:7.0:*:*:*:*:*:*:*
- cpe:2.3:a:redhat:openshift_container_platform:4.1:*:*:*:*:*:*:*
- cpe:2.3:a:redhat:openshift_container_platform:3.11:*:*:*:*:*:*:*
- cpe:2.3:a:redhat:openshift_container_platform:4.2:*:*:*:*:*:*:*
- cpe:2.3:a:redhat:openshift_container_platform:4.3:*:*:*:*:*:*:*
- cpe:2.3:a:redhat:openshift_container_platform:4.4:*:*:*:*:*:*:*
- cpe:2.3:a:redhat:openshift_container_platform:4.5:*:*:*:*:*:*:*
- cpe:2.3:a:redhat:openshift_container_platform_for_ibm_z:4.2:*:*:*:*:*:*:*
- cpe:2.3:a:redhat:openshift_container_platform_for_ibm_z:4.1:*:*:*:*:*:*:*
- cpe:2.3:a:redhat:openshift_container_platform_for_linuxone:4.2:*:*:*:*:*:*:*
- cpe:2.3:a:redhat:openshift_container_platform_for_linuxone:4.1:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:*
- cpe:2.3:a:gpgme_project:gpgme:*:*:*:*:*:go:*:*
Exploit prediction scoring system (EPSS) score for CVE-2020-8945
4.01%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 88 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2020-8945
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
5.1
|
MEDIUM | AV:N/AC:H/Au:N/C:P/I:P/A:P |
4.9
|
6.4
|
NIST | |
|
7.5
|
HIGH | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H |
1.6
|
5.9
|
NIST |
CWE ids for CVE-2020-8945
-
The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.Assigned by: nvd@nist.gov (Primary)
References for CVE-2020-8945
-
https://bugzilla.redhat.com/show_bug.cgi?id=1795838
1795838 – (CVE-2020-8945) CVE-2020-8945 proglottis/gpgme: Use-after-free in GPGME bindings during container image pullIssue Tracking;Patch;Third Party Advisory
-
https://access.redhat.com/errata/RHSA-2020:0689
RHSA-2020:0689 - Security Advisory - Red Hat Customer PortalThird Party Advisory
-
https://access.redhat.com/errata/RHSA-2020:0697
RHSA-2020:0697 - Security Advisory - Red Hat Customer PortalThird Party Advisory
-
https://github.com/proglottis/gpgme/compare/v0.1.0...v0.1.1
Comparing v0.1.0...v0.1.1 · proglottis/gpgme · GitHubPatch;Third Party Advisory
-
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/KDBT77KV3U7BESJX3P4S4MPVDGRTAQA2/
[SECURITY] Fedora 30 Update: skopeo-0.1.41-1.fc30 - package-announce - Fedora Mailing-ListsMailing List;Third Party Advisory
-
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/3SOCLOPTSYABTE4CLTSPDIFE6ZZZR4LX/
Mailing List;Third Party Advisory
-
https://github.com/containers/image/commit/4c7a23f82ef09127b0ff28366d1cf31316dd6cc1
Update to github.com/mtrmac/gpgme@v0.1.1 · containers/image@4c7a23f · GitHubPatch;Third Party Advisory
-
https://github.com/proglottis/gpgme/pull/23
Ensure finalizers don't deallocate GPGME objects while C code is still using them by mtrmac · Pull Request #23 · proglottis/gpgme · GitHubExploit;Patch;Third Party Advisory
-
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/H6P6SSNKN4H6GSEVROHBDXA64PX7EOED/
[SECURITY] Fedora 31 Update: skopeo-0.1.41-1.fc31 - package-announce - Fedora Mailing-ListsMailing List;Third Party Advisory
-
https://access.redhat.com/errata/RHSA-2020:0679
RHSA-2020:0679 - Security Advisory - Red Hat Customer PortalThird Party Advisory
-
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WXV7NZELYWRRCXATXU3FYD3G3WJT3WYM/
[SECURITY] Fedora 30 Update: podman-1.8.0-4.fc30 - package-announce - Fedora Mailing-ListsMailing List;Third Party Advisory
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