Bug 2252245 (CVE-2023-49087)

Summary: CVE-2023-49087 xml-security: insufficient verification of data can lead to signature forging
Product: [Other] Security Response Reporter: ybuenos
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: asoldano, bbaranow, bmaxwell, brian.stansberry, cdewolf, chazlett, darran.lofthouse, dkreling, dosoudil, fjuma, ivassile, iweiss, lgao, mosmerov, msochure, mstefank, msvehla, nwallace, pjindal, pmackay, rstancel, smaestri, tom.jenkinson
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: xml-security 1.6.12, xml-security 5.0.0-alpha.13 Doc Type: ---
Doc Text:
A flaw was found in xml-security due to insufficient verification of data authenticity. If an attacker manipulates the canonicalized version's DigestValue, the cryptographic signature on the SignedInfo tree could be forged.
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Clone Of: Environment:
Last Closed: Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 2252246, 2252247    
Bug Blocks: 2252238    

Description ybuenos 2023-11-30 10:21:30 UTC 
xml-security is a library that implements XML signatures and encryption. Validation of an XML signature requires verification that the hash value of the related XML-document matches a specific DigestValue-value, but also that the cryptographic signature on the SignedInfo-tree (the one that contains the DigestValue) verifies and matches a trusted public key. If an attacker somehow (i.e. by exploiting a bug in PHP's canonicalization function) manages to manipulate the canonicalized version's DigestValue, it would be possible to forge the signature. This issue has been patched in version 1.6.12 and 5.0.0-alpha.13.

https://github.com/simplesamlphp/xml-security/commit/f509e3083dd7870cce5880c804b5122317287581
https://github.com/simplesamlphp/xml-security/security/advisories/GHSA-ww7x-3gxh-qm6r
Comment 1 ybuenos 2023-11-30 10:22:00 UTC 
Created xml-security-c tracking bugs for this issue:

Affects: epel-7 [bug 2252246]
Affects: fedora-all [bug 2252247]