Vulnerability identifier: #VU70670

Vulnerability risk: Medium

CVSSv3.1: 5.9 [CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-4170

CWE-ID: CWE-74

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
rxvt-unicode
Other software / Other software solutions

Vendor: rxvt-unicode

Description

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

The vulnerability exists due to improper input validation in the Perl background extension. A remote attacker can pass specially crafted input to the application and execute arbitrary commands in the victim's terminal when certain configuration is used.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

rxvt-unicode: 9.0 - 9.29

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External links
http://bugzilla.redhat.com/show_bug.cgi?id=2151597
http://www.openwall.com/lists/oss-security/2022/12/05/1

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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.