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<define-tag description>LTS security update</define-tag>
<define-tag moreinfo>
<p>It was discovered that there was a potential remote code execution via
deserialization in tomcat7, a server for HTTP and Java "servlets".</p>
<ul>
<li><a href="https://security-tracker.debian.org/tracker/CVE-2020-9484">CVE-2020-9484</a>
<p>When using Apache Tomcat versions 10.0.0-M1 to 10.0.0-M4, 9.0.0.M1 to
9.0.34, 8.5.0 to 8.5.54 and 7.0.0 to 7.0.103 if a) an attacker is able to
control the contents and name of a file on the server; and b) the server is
configured to use the PersistenceManager with a FileStore; and c) the
PersistenceManager is configured with
sessionAttributeValueClassNameFilter="null" (the default unless a
SecurityManager is used) or a sufficiently lax filter to allow the attacker
provided object to be deserialized; and d) the attacker knows the relative
file path from the storage location used by FileStore to the file the
attacker has control over; then, using a specifically crafted request, the
attacker will be able to trigger remote code execution via deserialization
of the file under their control. Note that all of conditions a) to d) must
be true for the attack to succeed.</p></li>
</ul>
<p>For Debian 8 <q>Jessie</q>, these problems have been fixed in version
7.0.56-3+really7.0.100-1+deb8u1.</p>
<p>We recommend that you upgrade your tomcat7 packages.</p>
<p>Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: <a href="https://wiki.debian.org/LTS">https://wiki.debian.org/LTS</a></p>
</define-tag>
# do not modify the following line
#include "$(ENGLISHDIR)/lts/security/2020/dla-2217.data"
# $Id: $
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