Bug 2262879 (CVE-2023-52426)

Summary: CVE-2023-52426 expat: recursive XML entity expansion vulnerability
Product: [Other] Security Response Reporter: Robb Gatica <rgatica>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: abobrov, csutherl, erack, jclere, jhorak, pjindal, plodge, szappis, tpopela
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
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Doc Text:
A flaw was found in Expat (libexpat). If XML_DTD is undefined at compile time, a recursive XML Entity Expansion condition can be triggered. This issue may lead to a condition where data is expanded exponentially, which will quickly consume system resources and cause a denial of service.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 2262885, 2262886, 2262887    
Bug Blocks: 2262876    

Description Robb Gatica 2024-02-05 23:31:25 UTC 
libexpat through 2.5.0 allows recursive XML Entity Expansion if XML_DTD is undefined at compile time.

References:
[1] https://github.com/libexpat/libexpat/pull/777
[2] https://github.com/libexpat/libexpat/commit/0f075ec8ecb5e43f8fdca5182f8cca4703da0404
Comment 1 Robb Gatica 2024-02-05 23:56:08 UTC 
Created expat tracking bugs for this issue:

Affects: fedora-all [bug 2262885]


Created mingw-expat tracking bugs for this issue:

Affects: fedora-all [bug 2262886]


Created xmlrpc-c tracking bugs for this issue:

Affects: fedora-all [bug 2262887]