CVE-2020-12823

high-risk

Published 2020-05-12

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.

Do I need to act?

1.9% chance of exploitation in next 30 days

EPSS score — moderate exploit probability

Not on CISA KEV list

No confirmed active exploitation reported to CISA

Patch status unknown

Check vendor advisories for fix availability and mitigation guidance

CVSS 9.8/10 Critical

NETWORK / LOW complexity

Affected Products (7)

Openconnect

Fedora

Debian Linux

Leap

Affected Vendors

Debian Fedoraproject Opensuse Infradead

References (18)

Mailing List http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00039.html

Mailing List http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00056.html

Exploit https://bugs.gentoo.org/721570

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

Mailing List https://lists.debian.org/debian-lts-announce/2020/05/msg00015.html

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro...

Third Party Advisory https://security.gentoo.org/glsa/202006-15

Mailing List http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00039.html

Mailing List http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00056.html

Exploit https://bugs.gentoo.org/721570

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

Mailing List https://lists.debian.org/debian-lts-announce/2020/05/msg00015.html

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro...

Third Party Advisory https://security.gentoo.org/glsa/202006-15

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high-risk

Severity 32/34 · Critical

Exploitability 5/34 · Minimal

Exposure 14/34 · Moderate