GLSA 202003-62: GNU Screen: Buffer overflow

http://security.gentoo.org/

Severity:	normal
Title:	GNU Screen: Buffer overflow
Date:	03/30/2020
Bugs:	#708460
ID:	202003-62

Synopsis

A buffer overflow in GNU Screen might allow remote attackers to corrupt memory.

Background

GNU Screen is a full-screen window manager that multiplexes a physical terminal between several processes, typically interactive shells.

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
app-misc/screen	< 4.8.0	>= 4.8.0	All supported architectures

Description

A buffer overflow was found in the way GNU Screen treated the special escape OSC 49.

Impact

A remote attacker, by writing a specially crafted string of characters to a GNU Screen window, could possibly corrupt memory or have other unspecified impact.

Workaround

There is no known workaround at this time.

Resolution

All GNU Screen users should upgrade to the latest version:

      # emerge --sync
      # emerge --ask --oneshot --verbose ">=app-misc/screen-4.8.0"

References

CVE-2020-9366

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-202003-62.xml

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.