Apache Xalan Java XSLT library is vulnerable to an integer truncation issue when processing malicious XSLT stylesheets
CVE-2022-34169

7.5HIGH

Key Information:

Vendor

Apache
Status
Apache Xalan-j
Vendor
CVE Published:
19 July 2022

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2022-34169?

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. Users are recommended to update to version 2.7.3 or later. Note: Java runtimes (such as OpenJDK) include repackaged copies of Xalan.

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Affected Version(s)

Apache Xalan-J Xalan-J <= 2.7.2

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

AutoGenerateXalanPayload
Created by flowerwind

CVE-2022-34169
Created by Disnaming

CVE-2022-34169
Created by bor8

References

https://lists.apache.org/thread/2qvl7r43wb4t8p9dd9om1bnks...
https://lists.apache.org/thread/12pxy4phsry6c34x2ol4fft6x...
http://www.openwall.com/lists/oss-security/2022/07/19/5
mailing-list

EPSS Score

6% chance of being exploited in the next 30 days.

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Reported by Felix Wilhelm, Google Project Zero
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