Advisories

Snipe-IT before 8.5.0 SAML Assertion Replay via Race Condition

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Severity
high
Date
Affecting
  • snipe-it >= 0, < 8.5.0

CWE
  • CWE-294 Authentication Bypass by Capture-replay
CVSS
8.7
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Credit
builtbybrayden, snipe
Description
Snipe-IT before 8.5.0 contains a SAML assertion replay vulnerability that allows attackers to reuse captured assertions by exploiting a non-atomic nonce check in the SAML acs handler. Attackers can send concurrent POST requests to /saml/acs with one captured assertion to obtain multiple authenticated victim sessions that evade IdP-driven revocation.

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