What’s Vulnerable › Vulnerabilities

CVE-2016-9955

• Severity: medium (CVSS 6.3 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2017-02-17 · updated 2026-06-17
• Weakness: CWE-20

Description

The SimpleSAML_XML_Validator class constructor in SimpleSAMLphp before 1.14.11 might allow remote attackers to spoof signatures on SAML 1 responses or possibly cause a denial of service (memory consumption) by leveraging improper conversion of return values to boolean.

Affected products

• Debian Linux: 7.0
• simplesamlphp: before 1.14.11 — fixed in 1.14.11

How to fix

Upgrade to a fixed version: simplesamlphp 1.14.11. Check the vendor advisory for mitigations.

References

• http://www.securityfocus.com/bid/94946
• https://lists.debian.org/debian-lts-announce/2018/03/msg00001.html
• https://simplesamlphp.org/security/201612-02
• http://www.securityfocus.com/bid/94946
• https://lists.debian.org/debian-lts-announce/2018/03/msg00001.html
• https://simplesamlphp.org/security/201612-02

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