CVE-2025-48995

Katalog CVE

CVSS 6.9 · Medium EPSS 0,23%

Kerentanan Observable Timing Discrepancy. Skor CVSS 4.0 6.9 (Medium) menurut github.com.

Deskripsi (NVD)

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.

Rincian

Terbit di NVD

2 Juni 2025

Terakhir diubah

17 Juni 2026

Status NVD

Deferred

CVSS 4.0

6.9 (Medium), sumber github.com
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-208: Observable Timing Discrepancy

EPSS (30 hari)

0,23% peluang dieksploitasi; lebih tinggi dari 12,7% CVE lain

Produk dan versi terdampak

NVD belum mencantumkan data produk (CPE) untuk CVE ini. Produk yang terdampak biasanya disebut di deskripsi dan di advisory vendor pada daftar referensi.

Referensi dan perbaikan

• https://github.com/XML-Security/signxml/commit/1b501faaacf34cf978a52dbc6915ec11e27611cd
• https://github.com/XML-Security/signxml/security/advisories/GHSA-gmhf-gg8w-jw42