UBUNTU-CVE-2025-48995
- Source
- https://ubuntu.com/security/CVE-2025-48995
- Import Source
- https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-48995.json
- JSON Data
- https://api.osv.dev/v1/vulns/UBUNTU-CVE-2025-48995
- Upstream
- Published
- 2025-06-02T17:15:00Z
- Modified
- 2025-07-11T06:01:50.583061Z
- Severity
-
- 6.9 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N CVSS Calculator
- - medium
- Summary
- [none]
- Details
-
SignXML is an implementation of the W3C XML Signature standard in Python. When verifying signatures with X509 certificate validation turned off and HMAC shared secret set (
signxml.XMLVerifier.verify(require_x509=False, hmac_key=...), versions of SignXML prior to 4.0.4 are vulnerable to a potential timing attack. The verifier may leak information about the correct HMAC when comparing it with the user supplied hash, allowing users to reconstruct the correct HMAC for any data. - References