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5.8

JOSSO lets attackers bypass login with unsigned SAML

CVE-2012-5352 · published 14 years ago
Summary

The JOSSO single sign‑on system can accept SAML messages that do not contain a digital signature. Because the signature is missing, an attacker could craft a fake authentication message and gain access without valid credentials. Apply the latest security update or disable SAML messages that lack a signature to stop this from happening.

What to do

The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.

Affected software
VendorProductAffected versions
josso java_open_single_sign-on_project_home All versions
cpe:2.3:a:josso:java_open_single_sign-on_project_home:-:*:*:*:*:*:*:*
Original advisory text
Java Open Single Sign-On Project Home (JOSSO) allows remote attackers to forge messages and bypass authentication via a SAML assertion that lacks a Signature element, aka a "Signature exclusion att...
Java Open Single Sign-On Project Home (JOSSO) allows remote attackers to forge messages and bypass authentication via a SAML assertion that lacks a Signature element, aka a "Signature exclusion attack."
References
Fix within
Internet-facing 60 days
Internal At next upgrade
  • Not known to be exploited
  • Needs hands-on effort to exploit (estimated)
  • Gives an attacker partial control (estimated)
Severity
5.8 Medium
Exploitation
3% chance of attack within 30 days
Type
CWE-287Improper Authentication
Timeline
Published9 Oct 2012
Updated29 Oct 2026
First seen29 Sep 2026
Sources
CVE-2012-5352 · NVD
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