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Vulnerabilities / CVE-2020-12823

critical

CVE-2020-12823

OpenConnect 8.09 has a buffer overflow, causing a denial of service (a ...

Published Modified CWE 120
In the Trivy database since at least 24 Oct 2026, 07:11 UTCWhen it arrived before that build is not recorded.

Severity by source

NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Trivy's own label is CRITICAL. Rated critical by NVD. Rated lower by Ubuntu (medium).

Description

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.

Affected packages and fixed versions

SourcePackageFixed in
debian 11openconnect8.10-1
debian 12openconnect8.10-1
debian 13openconnect8.10-1
debian 14openconnect8.10-1
debian 8openconnect6.00-2+deb8u2
echoopenconnect8.10-1
ubuntu 18.04-ESMopenconnectno fix listed
ubuntu 20.04-ESMopenconnectno fix listed

References

All 10 references

Vulnerability data compiled from the Trivy vulnerability database (trivy-db, Aqua Security, Apache License 2.0), which aggregates third-party advisories. CVE records are published by The MITRE Corporation under the CVE Terms of Use; CVE is a trademark of MITRE. This product uses data from the NVD API but is not endorsed or certified by the NVD. Severity, titles and advisory data from the GitHub Advisory Database (CC BY 4.0), Red Hat security data (CC BY 4.0) and the other sources linked on each entry. Entries may be summarised or re-formatted; the linked original is the authoritative record.