Buffer overflow in Tmux
CVE-2020-27347
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.007 (51.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 51st percentile — 51.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000
Affected products
- Tmux — versions unspecified
- Tmux Project
- Ubuntu Tmux — versions 3.1b, 3.0a
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/tmux/tmux/commit/a868bacb46e3c900530bed47a1c6f85b0fbe701c (Patch, Third Party Advisory)
- www.openwall.com/lists/oss-security/2020/11/05/3 (Exploit, Mailing List, Third Party Advisory)
- security.gentoo.org/glsa/202011-10 (vendor-advisory, Third Party Advisory)
- raw.githubusercontent.com/tmux/tmux/3.1c/CHANGES (Third Party Advisory, Release Notes)
Frequently asked questions
- What is CVE-2020-27347?
- CVE-2020-27347 is a high-severity vulnerability in Tmux, classified under Stack-based Buffer Overflow. CVSS score: 8.8/10. Published 2020-11-06.
- How severe is CVE-2020-27347?
- High severity. CVSS v3 base score is 8.8 out of 10.
- Is CVE-2020-27347 known to be exploited?
- 4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.