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             AUSCERT External Security Bulletin Redistribution

                               ESB-2021.0646
                          screen security update
                             22 February 2021

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           screen
Publisher:         Debian
Operating System:  Debian GNU/Linux
Impact/Access:     Execute Arbitrary Code/Commands -- Remote/Unauthenticated
                   Denial of Service               -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2021-26937  

Reference:         ESB-2021.0593

Original Bulletin: 
   https://www.debian.org/lts/security/2021/dla-2570

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Debian LTS Advisory DLA-2570-1              debian-lts@lists.debian.org
https://www.debian.org/lts/security/                      Utkarsh Gupta
February 20, 2021                           https://wiki.debian.org/LTS
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Package        : screen
Version        : 4.5.0-6+deb9u1
CVE ID         : CVE-2021-26937
Debian Bug     : 982435

encoding.c in GNU Screen through 4.8.0 allows remote attackers
to cause a denial of service (invalid write access and application
crash) or possibly have unspecified other impact via a crafted
UTF-8 character sequence.

For Debian 9 stretch, this problem has been fixed in version
4.5.0-6+deb9u1.

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

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS
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===========================================================================
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===========================================================================
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