Bug 2448999 (CVE-2006-10003)

Summary: CVE-2006-10003 perl-xml-parser: XML::Parser: Memory corruption via deeply nested XML files
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Priority: high    
Version: unspecifiedKeywords: Security
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OS: Linux   
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A flaw was found in XML::Parser, a Perl module for parsing XML. This vulnerability, an off-by-one heap buffer overflow, occurs when processing an XML file with very deep element nesting. A remote attacker could exploit this by providing a specially crafted XML file, potentially leading to memory corruption.
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Bug Depends On: 2449275, 2449278, 2449280, 2449282    
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Description OSIDB Bzimport 2026-03-19 12:02:03 UTC 
XML::Parser versions through 2.47 for Perl has an off-by-one heap buffer overflow in st_serial_stack.

In the case (stackptr == stacksize - 1), the stack will NOT be expanded. Then the new value will be written at location (++stackptr), which equals stacksize and therefore falls just outside the allocated buffer.

The bug can be observed when parsing an XML file with very deep element nesting