Denial of service in xterm

1) Memory corruption

EUVDB-ID: #VU50810

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-27135

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

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

The vulnerability exists due to a boundary error when processing UTF-8 character sequences. A remote attacker can pass specially crafted data to the application, trigger memory corruption and perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

xterm: _nil_ - 365e

CPE2.3

• cpe:2.3:a:invisible-island.net:xterm:_nil_:*:*:*:*:*:*:*
• cpe:2.3:a:invisible-island.net:xterm:317c:*:*:*:*:*:*:*
• cpe:2.3:a:invisible-island.net:xterm:320:*:*:*:*:*:*:*

External links

https://www.openwall.com/lists/oss-security/2021/02/10/7
https://lists.debian.org/debian-lts-announce/2021/02/msg00019.html
https://www.openwall.com/lists/oss-security/2021/02/09/7
https://www.openwall.com/lists/oss-security/2021/02/09/9

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.