Fedora 35 update for freerdp, guacamole-server, remmina

Published: 2021-11-10

Risk	High
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2021-41159 CVE-2021-41160
CWE-ID	CWE-787
Exploitation vector	Network
Public exploit	N/A
Vulnerable software	Fedora Operating systems & Components / Operating system remmina Operating systems & Components / Operating system package or component guacamole-server Operating systems & Components / Operating system package or component freerdp Operating systems & Components / Operating system package or component
Vendor	Fedoraproject

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Out-of-bounds write

EUVDB-ID: #VU57585

Risk: High

CVSSv4.0: 6.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2021-41159

CWE-ID: CWE-787 - Out-of-bounds write

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a boundary error when processing /gt:rpc connections. A remote server can send specially crafted data to the client, trigger an out-of-bounds write and execute arbitrary code on the target system.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

Fedora: 35

remmina: before 1.4.21-1.fc35

guacamole-server: before 1.3.0-9.fc35

freerdp: before 2.4.1-1.fc35

CPE2.3

External links

https://bodhi.fedoraproject.org/updates/FEDORA-2021-2c25f03d0b

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Out-of-bounds write

EUVDB-ID: #VU57584