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CVE-2020-12105

Published: 23 April 2020

OpenConnect through 8.08 mishandles negative return values from X509_check_ function calls, which might assist attackers in performing man-in-the-middle attacks.

Notes

AuthorNote
mdeslaur
This only affects openconnect when built with OpenSSL. Debian
and Ubuntu packages are built with GnuTLS, so are not affected.

Priority

Low

Cvss 3 Severity Score

5.9

Score breakdown

Status

Package Release Status
openconnect
Launchpad, Ubuntu, Debian
hirsute Ignored
(end of life)
xenial Not vulnerable
(code not compiled)
impish Ignored
(end of life)
bionic Not vulnerable
(code not compiled)
eoan Ignored
(end of life)
focal Not vulnerable
(code not compiled)
groovy Ignored
(end of life)
jammy Not vulnerable
(code not compiled)
trusty Does not exist

upstream
Released (8.09)
Patches:
upstream: https://gitlab.com/openconnect/openconnect/-/commit/f07242df8ad6a0fb1a5b5a584ca086f1a429ee0b

Severity score breakdown

Parameter Value
Base score 5.9
Attack vector Network
Attack complexity High
Privileges required None
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact None
Availability impact None
Vector CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N