CVE-2020-12823

CRITICAL 9.8CVE-2020-12823 · Published 12/05/2020 · updated 17/06/2026

In short

CVE-2020-12823 is a CRITICAL (CVSS 9.8) vulnerability affecting openconnect (infradead).
Chance of exploitation in the next 30 days (EPSS): 4.7%, higher than 91.9% of all vulnerabilities.
No patched version is listed yet: follow the vendor's advisory in References.

Package	Affected versions	Patched versions
openconnect infradead	`= 8.09`	No fix yet

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.

References

lists.opensuse.org/opensuse-security-announce/2020-07/msg00039.html · Mailing List
lists.opensuse.org/opensuse-security-announce/2020-07/msg00056.html · Mailing List
bugs.gentoo.org/721570 · Exploit
gitlab.com/openconnect/openconnect/-/merge_requests/108 · Patch
lists.debian.org/debian-lts-announce/2020/05/msg00015.html · Mailing List
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/25MFX4AZE7RDCUWOL4ZOE73YBOPUMQDX
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AYSXLXAPXD2T73T6JMHI5G2WP7KHAGMN
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BEVTIH5UFX35CC7MVSYBGRM3D66ACFD5
security.gentoo.org/glsa/202006-15 · Third Party Advisory

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