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===========================================================================
             AUSCERT External Security Bulletin Redistribution

                               ESB-2021.1037
                           lxml security update
                               25 March 2021

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

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

Product:           lxml
Publisher:         Debian
Operating System:  Debian GNU/Linux
                   Windows
                   UNIX variants (UNIX, Linux, OSX)
Impact/Access:     Cross-site Scripting -- Remote with User Interaction
Resolution:        Patch/Upgrade
CVE Names:         CVE-2021-28957  

Original Bulletin: 
   https://lists.debian.org/debian-lts-announce/2021/03/msg00031.html

Comment: This advisory references vulnerabilities in products which run on 
         platforms other than Debian. It is recommended that administrators 
         running lxml check for an updated version of the software for their
         operating system.

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Debian LTS Advisory DLA-2606-1                debian-lts@lists.debian.org
https://www.debian.org/lts/security/                    Thorsten Alteholz
March 24, 2021                                https://wiki.debian.org/LTS
- - -------------------------------------------------------------------------

Package        : lxml
Version        : 3.7.1-1+deb9u4
CVE ID         : CVE-2021-28957


An issue has been found in lxml, a pythonic binding for the libxml2 and 
libxslt libraries.

Due to missing input sanitization, XSS is possible for the HTML5 
formaction attribute.


For Debian 9 stretch, this problem has been fixed in version
3.7.1-1+deb9u4.

We recommend that you upgrade your lxml packages.

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

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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