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AUSCERT External Security Bulletin Redistribution
ESB-2019.3240
Apache Santuario XML Security for Java potentially loads XML
parsing code from an untrusted source
26 August 2019
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AusCERT Security Bulletin Summary
---------------------------------
Product: Apache Santuario
Publisher: Apache
Operating System: Windows
UNIX variants (UNIX, Linux, OSX)
Impact/Access: Unauthorised Access -- Existing Account
Reduced Security -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2019-12400
Original Bulletin:
http://santuario.apache.org/secadv.data/CVE-2019-12400.asc
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Hash: SHA512
CVE-2019-12400: Apache Santuario potentially loads XML parsing code from an untrusted source
Severity: Moderate
Vendor: The Apache Software Foundation
Versions Affected:
This vulnerability affects the following releases of Apache Santuario XML
Security for Java:
- All 2.0.x releases from 2.0.3.
- All 2.1.x releases before 2.1.4. The issue is fixed in 2.1.4.
- 2.0.2 and earlier releases are not affected.
Description:
In version 2.0.3 of Apache Santuario XML Security for Java, a caching mechanism
was introduced to speed up creating new XML documents using a static pool of
DocumentBuilders.
However, if some untrusted code can register a malicious implementation with
the thread context class loader first, then this implementation might be
cached and re-used by Apache Santuario - XML Security for Java, leading to
potential security flaws when validating signed documents, etc.
Mitigation:
Users of Apache Santuario XML Security for Java after 2.0.2 should update to
the 2.1.4 release.
Credit:
This issue was discovered by Sean Mullan.
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