Denial of service in xterm

1) Memory corruption

EUVDB-ID: #VU50810

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

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: 317c - _nil_

External links

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