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Debian Security Advisory DSA-4861-1                   security@debian.org
https://www.debian.org/security/                     Salvatore Bonaccorso
February 21, 2021                     https://www.debian.org/security/faq
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Package        : screen
CVE ID         : CVE-2021-26937
Debian Bug     : 982435

Felix Weinmann reported a flaw in the handling of combining charactersin 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/source-package/screen

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/

Mailing list: debian-security-announce@lists.debian.org

Debian: DSA-4861-1: screen security update

February 21, 2021
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, ...

Summary

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/source-package/screen

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/

Mailing list: debian-security-announce@lists.debian.org

Severity
Felix Weinmann reported a flaw in the handling of combining charactersin 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.

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