Security Information / 2021 / Security Information -- DSA-4861-1 screen

Debian Security Advisory

DSA-4861-1 screen -- security update

Date Reported:

21 Feb 2021

Affected Packages:

screen

Vulnerable:

Yes

Security database references:

In the Debian bugtracking system: Bug 982435.
In Mitre's CVE dictionary: CVE-2021-26937.

More information:

Felix Weinmann reported a flaw in the handling of combining characters in screen, a terminal multiplexer with VT100/ANSI terminal emulation, which can result in denial of service, or potentially the execution of arbitrary code via a specially crafted UTF-8 character sequence.

For the stable distribution (buster), this problem has been fixed in version 4.6.2-3+deb10u1.

We recommend that you upgrade your screen packages.

For the detailed security status of screen please refer to its security tracker page at: https://security-tracker.debian.org/tracker/screen