CVE-2022-45063

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 5.4% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2022-11-10 · updated 2026-06-17
Weakness: CWE-77

Description

xterm before 375 allows code execution via font ops, e.g., because an OSC 50 response may have Ctrl-g and therefore lead to command execution within the vi line-editing mode of Zsh. NOTE: font ops are not allowed in the xterm default configurations of some Linux distributions.

Affected products

Fedoraproject Fedora: 35, 36, 37
Invisible-Island Xterm: before 375 — fixed in 375

How to fix

Upgrade to a fixed version: Invisible-Island Xterm 375. Check the vendor advisory for mitigations.

References

http://www.openwall.com/lists/oss-security/2022/11/10/1
http://www.openwall.com/lists/oss-security/2022/11/10/5
http://www.openwall.com/lists/oss-security/2024/06/15/1
http://www.openwall.com/lists/oss-security/2024/06/17/1
https://invisible-island.net/xterm/xterm.log.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4TPVNTYFFWNTGZJJQAA4MGGFSTXA4XEA/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5T2JI5JCHPTXX2KJU45H2XAHQSFVEJ2Y/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IVD3I2ZFXGOY6BA2FNS7WPFMPFBDHFWC/
https://news.ycombinator.com/item?id=33546415
https://security.gentoo.org/glsa/202211-09
https://www.openwall.com/lists/oss-security/2022/11/10/1
http://www.openwall.com/lists/oss-security/2022/11/10/1

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