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Deserialization of Untrusted Data Affecting tomcat-webapps package, versions <9.0.35-3.52.2

0.0
high

Snyk CVSS

    Attack Complexity High
    Confidentiality High
    Integrity High
    Availability High

    Threat Intelligence

    Exploit Maturity Proof of concept
    EPSS 92.25% (99th percentile)
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NVD
7 high
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SUSE
7.5 high
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Red Hat
7 high

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  • Snyk ID SNYK-SLES150-TOMCATWEBAPPS-2712406
  • published 14 Apr 2022
  • disclosed 21 May 2020
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Introduced: 21 May 2020

CVE-2020-9484 Open this link in a new tab
CWE-502 Open this link in a new tab

How to fix?

Upgrade SLES:15.0 tomcat-webapps to version 9.0.35-3.52.2 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream tomcat-webapps package and not the tomcat-webapps package as distributed by SLES. See How to fix? for SLES:15.0 relevant fixed versions and status.

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.

References