Gentoo: GLSA-202003-62 Normal: GNU Screen Memory Corruption Threat
gentoo
March 30, 2020
A buffer overflow in GNU Screen might allow remote attackers to corrupt memory.
Summary
A buffer overflow was found in the way GNU Screen treated the special escape OSC 49.
Topics Covered
Resolution
All GNU Screen users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=app-misc/screen-4.8.0"
References
[ 1 ] CVE-2020-9366 https://nvd.nist.gov/vuln/detail/CVE-2020-9366
Availability
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:
https://security.gentoo.org/glsa/202003-62
style>.gentoo_availability{display:block;}
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.
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Severity: Normal
Title: GNU Screen: Buffer overflow
Date: March 30, 2020
Bugs: #708460
ID: 202003-62
Topics Covered
Background
GNU Screen is a full-screen window manager that multiplexes a physical
terminal between several processes, typically interactive shells.
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Affected Packages
-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 app-misc/screen < 4.8.0 >= 4.8.0
Impact
=====
A remote attacker, by writing a specially crafted string of charactersto a GNU Screen window, could possibly corrupt memory or have other
unspecified impact.
Workaround
There is no known workaround at this time.
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