TI-2020-10191 Aliases CVE-2020-12823 GHSA-f93c-rq5c-gvpf

OpenConnect 8.09 has a buffer overflow, causing a denial of service (application crash)…

MEDIUM 50CWE-120Published 2020-05-12 · Updated 2024-08-04

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Code execution
Confidentiality · integrity · availability: High · High · High
Fix status: No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-120 and the CVSS impact.

Summary

OpenConnect 8.09 has a buffer overflow, causing a denial of service (application crash) or possibly unspecified other impact, via crafted certificate data to get_cert_name in gnutls.c.

Why it matters now

EPSS 0.04743 91st percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
—	—	all versions	—	No fix listed	CNA

— Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 7

CPE	Versions	Role	Vendor
cpe:2.3:a:infradead:openconnect:8.09:::::::*	8.09	Vulnerable	Infradead
cpe:2.3:o:fedoraproject:fedora:30:::::::*	30	Vulnerable	Fedoraproject
cpe:2.3:o:fedoraproject:fedora:31:::::::*	31	Vulnerable	Fedoraproject
cpe:2.3:o:fedoraproject:fedora:32:::::::*	32	Vulnerable	Fedoraproject
cpe:2.3:o:debian:debian_linux:8.0:::::::*	8.0	Vulnerable	Debian
cpe:2.3:o:opensuse:leap:15.1:::::::*	15.1	Vulnerable	openSUSE
cpe:2.3:o:opensuse:leap:15.2:::::::*	15.2	Vulnerable	openSUSE

cpe:2.3:a:infradead:openconnect:8.09:*:*:*:*:*:*:* Versions 8.09 Vulnerable ·Infradead
cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:* Versions 30 Vulnerable ·Fedoraproject
cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:* Versions 31 Vulnerable ·Fedoraproject
cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:* Versions 32 Vulnerable ·Fedoraproject
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* Versions 8.0 Vulnerable ·Debian
cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:* Versions 15.1 Vulnerable ·openSUSE
cpe:2.3:o:opensuse:leap:15.2:*:*:*:*:*:*:* Versions 15.2 Vulnerable ·openSUSE

Remediation

No fixed version listed by the sources yet.

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product

Red Hat

Timeline

2026-10-02 Threatist record created from CVE-2020-12823
2026-10-03 Alias added: GHSA-f93c-rq5c-gvpf

References

Exploit 1

https://bugs.gentoo.org/721570

Patch 1

https://gitlab.com/openconnect/openconnect/-/merge_requests/108

Advisory 7

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences