Remote code execution in Rxvt

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

Risk	Low
Patch available	NO
Number of vulnerabilities	1
CVE-ID	CVE-2021-33477
CWE-ID	CWE-20
Exploitation vector	Network
Public exploit	N/A
Vulnerable software	Rxvt Client/Desktop applications / Software for system administration
Vendor	Rxvt.org

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Input validation error

EUVDB-ID: #VU67654

Risk: Low

CVSSv4.0: 2 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

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

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

Rxvt: 0.5.4 - 9.22

CPE2.3

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.