Out-of-bounds write in tmux
| Risk | Low |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2020-27347 |
| CWE-ID | CWE-787 |
| Exploitation vector | Local |
| Public exploit | N/A |
| Vulnerable software Subscribe |
tmux Client/Desktop applications / Other client software |
| Vendor | tmux |
Security Bulletin
This security bulletin contains one low risk vulnerability.
1) Out-of-bounds write
EUVDB-ID: #VU48517
Risk: Low
CVSSv3.1: 6.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2020-27347
CWE-ID:
CWE-787 - Out-of-bounds write
Exploit availability: No
DescriptionThe vulnerability allows a local authenticated user to execute arbitrary code.
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.
MitigationInstall update from vendor's website.
Vulnerable software versionstmux: 3.0 - 3.1b
CPE2.3- cpe:2.3:a:tmux:tmux:3.0:*:*:*:*:*:*:*
- cpe:2.3:a:tmux:tmux:3.0a:*:*:*:*:*:*:*
- cpe:2.3:a:tmux:tmux:3.0a-r2:*:*:*:*:*:*:*
http://github.com/tmux/tmux/commit/a868bacb46e3c900530bed47a1c6f85b0fbe701c
http://raw.githubusercontent.com/tmux/tmux/3.1c/CHANGES
http://security.gentoo.org/glsa/202011-10
http://www.openwall.com/lists/oss-security/2020/11/05/3
Q & A
Can this vulnerability be exploited remotely?
No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
