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Advisories

Alluxio through 2.9.5 S3 REST Proxy Authentication Bypass via Unverified Request Signature

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severity
critical
date
Affecting

  • alluxio <= 2.9.5

CWE
  • CWE-287 Improper Authentication
CVSS
9.3
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Credit
George Chen
Description
Alluxio's S3 REST proxy fails to verify AWS Signature Version 4 signatures in its default configuration, allowing unauthenticated attackers to spoof user identity. Attackers can extract usernames from unsigned Authorization headers and impersonate any user, including service accounts, to read, write, and delete arbitrary data.

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