VAR-202011-0763
Vulnerability from variot - Updated: 2023-12-18 12:27In 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. tmux Is vulnerable to an out-of-bounds write.Information is obtained, information is tampered with, and service is disrupted (DoS) It may be put into a state. ========================================================================= Ubuntu Security Notice USN-4618-1 November 05, 2020
tmux vulnerability
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 20.10
- Ubuntu 20.04 LTS
Summary:
tmux could be made to crash or execute arbitrary code if it received a specially crafted input.
Software Description: - tmux: terminal multiplexer
Details:
Sergey Nizovtsev discovered that tmux incorrectly handled some inputs.
Update instructions:
The problem can be corrected by updating your system to the following package versions:
Ubuntu 20.10: tmux 3.1b-1ubuntu0.1
Ubuntu 20.04 LTS: tmux 3.0a-2ubuntu0.2
After a standard system update you need to restart tmux session to make all the necessary changes.
References: https://usn.ubuntu.com/4618-1 CVE-2020-27347
Package Information: https://launchpad.net/ubuntu/+source/tmux/3.1b-1ubuntu0.1 https://launchpad.net/ubuntu/+source/tmux/3.0a-2ubuntu0.2 . - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 202011-10
https://security.gentoo.org/
Severity: Normal Title: tmux: Buffer overflow Date: November 11, 2020 Bugs: #753206 ID: 202011-10
Synopsis
A buffer overflow in tmux might allow remote attacker(s) to execute arbitrary code.
Background
tmux is a terminal multiplexer.
Affected packages
-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 app-misc/tmux < 3.1c >= 3.1c
Description
A flaw in tmux's handling of escape characters was discovered which may allow a buffer overflow.
Impact
A remote attacker could possibly execute arbitrary code with the privileges of the process, or cause a Denial of Service condition.
Workaround
There is no known workaround at this time.
Resolution
All tmux users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose ">=app-misc/tmux-3.1c"
References
[ 1 ] CVE-2020-27347 https://nvd.nist.gov/vuln/detail/CVE-2020-27347
Availability
This GLSA and any updates to it are available for viewing at the Gentoo Security Website:
https://security.gentoo.org/glsa/202011-10
Concerns?
Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users' machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.
License
Copyright 2020 Gentoo Foundation, Inc; referenced text belongs to its owner(s).
The contents of this document are licensed under the Creative Commons - Attribution / Share Alike license.
https://creativecommons.org/licenses/by-sa/2.5
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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