Description
The W3C XML Signature Syntax and Processing (XMLDsig) specification, starting with 1.0, was originally published with a "RetrievalMethod is a URI ... that may be used to obtain key and/or certificate information" statement and no accompanying information about SSRF risks, and this may have contributed to vulnerable implementations such as those discussed in CVE-2023-36661 and CVE-2024-21893. NOTE: this was mitigated in 1.1 and 2.0 via a directly referenced Best Practices document that calls on implementers to be wary of SSRF.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:LWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| n/a | n/a | n/a |
| w3c | xml_signature_syntax_and_processing | < 1.1; < 2.0 |
References
- https://github.com/zmanion/Vulnerabilities/blob/main/CVE-2024-21893.md
- https://www.w3.org/Signature/Drafts/WD-xmldsig-core-200003plc/
- https://www.w3.org/TR/2013/NOTE-xmldsig-bestpractices-20130411/
- https://www.w3.org/TR/xmldsig-core1/
- https://www.w3.org/TR/xmldsig-core2/
- https://github.com/zmanion/Vulnerabilities/blob/main/CVE-2024-21893.md
- https://www.w3.org/Signature/Drafts/WD-xmldsig-core-200003plc/
- https://www.w3.org/TR/2013/NOTE-xmldsig-bestpractices-20130411/
- https://www.w3.org/TR/xmldsig-core1/
- https://www.w3.org/TR/xmldsig-core2/
Timeline
- Published
- Jun 26, 2024
- Last modified
- Jun 17, 2026
- NVD status
- Deferred