CVE-2015-9287: Directory Traversal was discovered in University of Cambridge mod_ucam_webauth before 2.0.2. The key identification field ("kid") of the IdP's HTTP re...

Description

Directory Traversal was discovered in University of Cambridge mod_ucam_webauth before 2.0.2. The key identification field ("kid") of the IdP's HTTP response message ("WLS-Response") can be manipulated by an attacker. The "kid" field is not signed like the rest of the message, and manipulation is therefore trivial. The "kid" field should only ever represent an integer. However, it is possible to provide any string value. An attacker could use this to their advantage to force the application agent to load the RSA public key required for message integrity checking from an unintended location.

Metrics

EPSS Probability

1.99%

78.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-22

Affected Software

Vendor	Product	Versions
Cam	The University Of Cambridge Web Authentication System Apache Authentication Agent	< 2.0.2

References

https://doi.org/10.1007/978-3-030-03251-7_1Permissions Required, Third Party Advisory
https://github.com/grymer/CVEThird Party Advisory
https://doi.org/10.1007/978-3-030-03251-7_1Permissions Required, Third Party Advisory
https://github.com/grymer/CVEThird Party Advisory

Timeline

Published: May 13, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2015-9287?

Directory Traversal was discovered in University of Cambridge mod_ucam_webauth before 2.0.2. The key identification field ("kid") of the IdP's HTTP response message ("WLS-Response") can be manipulated by an attacker. The "kid" field is not signed like the rest of the message, and manipulation is therefore trivial. The "kid" field should only ever represent an integer. However, it is possible to provide any string value. An attacker could use this to their advantage to force the application agent to load the RSA public key required for message integrity checking from an unintended location.

How severe is CVE-2015-9287?

Severity scoring for CVE-2015-9287 is pending analysis. The EPSS model estimates a 1.99% probability of exploitation in the next 30 days.

How do I fix CVE-2015-9287?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

How Strix Helps

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