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Apache Xalan Java XSLT library integer truncation issue when processing malicious XSLT stylesheets

High severity GitHub Reviewed Published Jul 20, 2022 to the GitHub Advisory Database • Updated Jun 24, 2024

Package

maven xalan:xalan (Maven)

Affected versions

< 2.7.3

Patched versions

2.7.3

Description

The Apache Xalan Java XSLT library is vulnerable to an integer truncation issue when processing malicious XSLT stylesheets. This can be used to corrupt Java class files generated by the internal XSLTC compiler and execute arbitrary Java bytecode.

A fix for this issue was published in September 2022 as part of an anticipated 2.7.3 release.

References

Published by the National Vulnerability Database Jul 19, 2022
Published to the GitHub Advisory Database Jul 20, 2022
Reviewed Jul 21, 2022
Last updated Jun 24, 2024

Severity

High

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

EPSS score

0.165%
(54th percentile)

Weaknesses

CVE ID

CVE-2022-34169

GHSA ID

GHSA-9339-86wc-4qgf

Source code

Credits

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