CVE-2021-33477

Published: May 20, 2021Modified: Jun 17, 2026

8.8

Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Exploitability: 2.8 / Impact: 5.9

Source: NVD

Description

rxvt-unicode 9.22, rxvt 2.7.10, mrxvt 0.5.4, and Eterm 0.9.7 allow (potentially remote) code execution because of improper handling of certain escape sequences (ESC G Q). A response is terminated by a newline.

Affected (7)

Products: Eterm Project: Eterm · Mrxvt Project: Mrxvt · Rxvt Unicode Project: Rxvt Unicode · +3 more

Show all products

Eterm Project: Eterm · Mrxvt Project: Mrxvt · Rxvt Unicode Project: Rxvt Unicode · Rxvt Project: Rxvt · Fedoraproject: Fedora · Debian: Debian Linux

1 product

1 product

1 product

1 product

1 product

1 product

Configuration A

4 vulnerable

Vulnerable Software	Affected Versions
Eterm Project Eterm	Version 0.9.7
Mrxvt Project Mrxvt	Version 0.5.4
Rxvt Unicode Project Rxvt Unicode	Version 9.22
Rxvt Project Rxvt	Version 2.7.10

Configuration B

2 vulnerable

Vulnerable Software	Affected Versions
Fedoraproject Fedora	Version 33
Fedoraproject Fedora	Version 34

Configuration C

1 vulnerable

Vulnerable Software	Affected Versions
Debian Debian Linux	Version 9.0

Related CWEs

CWE-755

Improper Handling of Exceptional Conditions

The product does not handle or incorrectly handles an exceptional condition.

References (40)

http://cvs.schmorp.de/rxvt-unicode/Changes?view=log

Source: cve@mitre.org

Third Party Advisory

http://cvs.schmorp.de/rxvt-unicode/src/command.C?r1=1.582&r2=1.583

Source: cve@mitre.org

PatchThird Party Advisory

https://git.enlightenment.org/apps/eterm.git/log/

Source: cve@mitre.org

Third Party Advisory

https://lists.debian.org/debian-lts-announce/2021/05/msg00026.html

Source: cve@mitre.org

Mailing ListThird Party Advisory

https://lists.debian.org/debian-lts-announce/2021/06/msg00010.html

Source: cve@mitre.org

Mailing ListThird Party Advisory

https://lists.debian.org/debian-lts-announce/2021/06/msg00011.html

Source: cve@mitre.org

Mailing ListThird Party Advisory

https://lists.debian.org/debian-lts-announce/2021/06/msg00012.html

Source: cve@mitre.org

Mailing ListThird Party Advisory

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6RFMU5YXXNYYVA7G2DAHRXXHO6JKVFUT/

Source: cve@mitre.org

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AO52OLNOOKOCZSJCN3R7Q25XA32BWNWP/

Source: cve@mitre.org

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DUV4LDVZVW7KCGPAMFZD4ZJ4FVLPOX4C/

Source: cve@mitre.org

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NZWGE2RJONBEHSPCBUAW72NTRTIFKZAX/

Source: cve@mitre.org

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SLPVEPBH37EBR4R54RMC6GD33J37HJXD/

Source: cve@mitre.org

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UXAKO6N6NKTR6Z6KVAPEXSZQMRU52SGA/

Source: cve@mitre.org

https://packetstormsecurity.com/files/162621/rxvt-2.7.0-rxvt-unicode-9.22-Code-Execution.html

Source: cve@mitre.org

ExploitThird Party AdvisoryVDB Entry

https://security.gentoo.org/glsa/202105-17

Source: cve@mitre.org

Third Party Advisory

https://security.gentoo.org/glsa/202209-07

Source: cve@mitre.org

Third Party Advisory

https://sourceforge.net/projects/materm/files/mrxvt%20source/

Source: cve@mitre.org

ProductThird Party Advisory

https://sourceforge.net/projects/rxvt/files/rxvt-dev/

Source: cve@mitre.org

ProductThird Party Advisory

https://www.openwall.com/lists/oss-security/2017/05/01/20

Source: cve@mitre.org

Mailing ListThird Party Advisory

https://www.openwall.com/lists/oss-security/2021/05/17/1

Source: cve@mitre.org

ExploitMailing ListThird Party Advisory

http://cvs.schmorp.de/rxvt-unicode/Changes?view=log