#VU94647 Input validation error in Rxvt - CVE-2000-0476

Vulnerability identifier: #VU94647

Vulnerability risk: Low

CVSSv4.0: 1.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/U:Clear]

CVE-ID: CVE-2000-0476

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: Yes

Vulnerable software:
Rxvt
Client/Desktop applications / Software for system administration

Vendor: Rxvt.org

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input. A remote attacker can trick the victim to insert certain characters that force the window to be resized and crash the terminal.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Rxvt: 2.6.1

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External links
https://archives.neohapsis.com/archives/bugtraq/2000-05/0409.html
https://www.securityfocus.com/bid/1298
https://archives.neohapsis.com/archives/bugtraq/2000-05/0420.html
https://www.openwall.com/lists/oss-security/2024/06/09/1
https://www.openwall.com/lists/oss-security/2024/06/09/2

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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. However, proof of concept for this vulnerability is available.