Remote code execution in rxvt-unicode

Published: 2021-05-20 | Updated: 2022-09-26

Risk	Low
Patch available	YES
Number of vulnerabilities	1
CVE-ID	CVE-2021-33477
CWE-ID	CWE-20
Exploitation vector	Network
Public exploit	N/A
Vulnerable software Subscribe	rxvt-unicode Other software / Other software solutions
Vendor	rxvt-unicode

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Input validation error

EUVDB-ID: #VU67654

Risk: Low

CVSSv3.1: 6.2 [CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-33477

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise the affected system.

The vulnerability exists due to insufficient validation of user-supplied input when running an application inside the terminal window. A remote attacker can trick the victim to run a specially crafted program or open a specially crafted file and execute arbitrary code on the system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

rxvt-unicode: 9.0 - 9.22

External links

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

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