Advisories ยป MGASA-2020-0277

Updated tomcat packages fix security vulnerability

Publication date: 05 Jul 2020
Type: security
Affected Mageia releases : 7
CVE: CVE-2020-9484


Updated tomcat packages fix security vulnerability:

When using Apache Tomcat versions 9.0.0.M1 to 9.0.34, 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 (CVE-2020-9484).