Use-after-free in gpgme package for GPGME library



Risk High
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2020-8945
CWE-ID CWE-416
Exploitation vector Network
Public exploit N/A
Vulnerable software
 gpgme
Web applications / Modules and components for CMS

Vendor James Fargher

Security Bulletin

This security bulletin contains one high risk vulnerability.

1) Use-after-free

EUVDB-ID: #VU25501

Risk: High

CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2020-8945

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error, as demonstrated by use for container image pulls by Docker or CRI-O. A remote attacker can crash the target system, or cause potential code execution for Go applications that use this library under certain conditions during GPG signature verification.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

gpgme: 0.1.0

CPE2.3 External links

https://bugzilla.redhat.com/show_bug.cgi?id=1795838
https://github.com/containers/image/commit/4c7a23f82ef09127b0ff28366d1cf31316dd6cc1
https://github.com/proglottis/gpgme/compare/v0.1.0...v0.1.1
https://github.com/proglottis/gpgme/pull/23


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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