CVE-2020-27347

tmux stack buffer overflow in function input_csi_dispatch_sgr_colon

In tmux before version 3.1c the function input_csi_dispatch_sgr_colon() in file input.c contained a stack-based buffer-overflow that can be exploited by terminal output.

Affected

tmux · Ubuntu

CVSS v3.1 NVD

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

CVSS v3.1 UBUNTU

8.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

CVSS v2.0 NVD

4.6 MEDIUMAV:L/AC:L/Au:N/C:P/I:P/A:P

EPSS

0.69% chance of exploitation in the next 30 days, 52nd percentile

Published

2020-11-06

Updated

2024-09-17

Proof-of-concept exploits (1)

• lucadibello/tmux-fuzzing1★ · 2025-05-16

Security advisories

• tmux/tmux/commit/a868bacb46e3c900530bed47a1c6f85b0fbe701c
• https://raw.githubusercontent.com/tmux/tmux/3.1c/CHANGES
• https://security.gentoo.org/glsa/202011-10
• https://www.openwall.com/lists/oss-security/2020/11/05/3

References

• CVE Record
• NVD entry