Bug#1001061: freerdp2: CVE-2021-41159: Improper client input validation for gateway connections allows to overwrite memory

[Salvatore Bonaccorso <carnil@debian.org>]

Source: freerdp2
Version: 2.3.0+dfsg1-2
Severity: important
Tags: security upstream
X-Debbugs-Cc: carnil@debian.org, Debian Security Team <team@security.debian.org>

Hi,

The following vulnerability was published for freerdp2.

CVE-2021-41159[0]:
| FreeRDP is a free implementation of the Remote Desktop Protocol (RDP),
| released under the Apache license. All FreeRDP clients prior to
| version 2.4.1 using gateway connections (`/gt:rpc`) fail to validate
| input data. A malicious gateway might allow client memory to be
| written out of bounds. This issue has been resolved in version 2.4.1.
| If you are unable to update then use `/gt:http` rather than /gt:rdp
| connections if possible or use a direct connection without a gateway.


If you fix the vulnerability please also make sure to include the
CVE (Common Vulnerabilities & Exposures) id in your changelog entry.

For further information see:

[0] https://security-tracker.debian.org/tracker/CVE-2021-41159
    https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-41159
[1] https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-vh34-m9h7-95xq

Please adjust the affected versions in the BTS as needed.

Regards,
Salvatore