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CVE-2017-18122

8.1 · HIGH

A signature-validation bypass issue was discovered in SimpleSAMLphp through 1.14.16.

Published Feb 2, 2018CWE-347EPSS 1.09%

Overview

CVE-2017-18122 is a high-severity vulnerability. It was published on February 2, 2018 and has a CVSS 3.0 base score of 8.1 (HIGH).

This vulnerability has a CVSS 3.0 base score of 8.1, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

A signature-validation bypass issue was discovered in SimpleSAMLphp through 1.14.16. A SimpleSAMLphp Service Provider using SAML 1.1 will regard as valid any unsigned SAML response containing more than one signed assertion, provided that the signature of at least one of the assertions is valid. Attributes contained in all the assertions received will be merged and the entityID of the first assertion received will be used, allowing an attacker to impersonate any user of any IdP given an assertion signed by the targeted IdP.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Reflists.debian.org/debian-lts-announce/2018/02/msg00008.htmlRefsimplesamlphp.org/security/201710-01Refwww.debian.org/security/2018/dsa-4127Reflists.debian.org/debian-lts-announce/2018/02/msg00008.htmlRefsimplesamlphp.org/security/201710-01Refwww.debian.org/security/2018/dsa-4127

How CyberStrike helps

Frequently asked questions

What is CVE-2017-18122?

CVE-2017-18122 is a high-severity vulnerability. It was published on February 2, 2018 and has a CVSS 3.0 base score of 8.1 (HIGH).

How severe is CVE-2017-18122?

This vulnerability has a CVSS 3.0 base score of 8.1, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2017-18122?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2017-18122?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2017-18122 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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