[ASA-202005-11] openconnect: arbitrary code execution

[Morten Linderud]

Arch Linux Security Advisory ASA-202005-11
==========================================

Severity: Low
Date    : 2020-05-19
CVE-ID  : CVE-2020-12823
Package : openconnect
Type    : arbitrary code execution
Remote  : No
Link    : https://security.archlinux.org/AVG-1157

Summary
=======

The package openconnect before version 1:8.10-1 is vulnerable to
arbitrary code execution.

Resolution
==========

Upgrade to 1:8.10-1.

# pacman -Syu "openconnect>=1:8.10-1"

The problem has been fixed upstream in version 8.10.

Workaround
==========

None.

Description
===========

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

Impact
======

An attacker can cause the application to crash, or possibly execute
arbitrary code, by tricking a user into using a specially crafted
certificate.

References
==========

https://gitlab.com/openconnect/openconnect/-/merge_requests/108
https://security.archlinux.org/CVE-2020-12823
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