University of Cambridge mod_ucam_webauth up to 2.0.1 kid path traversal

Summaryinfo

A vulnerability classified as critical was found in University of Cambridge mod_ucam_webauth up to 2.0.1. Affected by this vulnerability is an unknown functionality. Executing a manipulation of the argument kid as part of HTTP Response can lead to path traversal. This vulnerability is handled as CVE-2015-9287. The attack can be executed remotely. There is not any exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability classified as critical was found in University of Cambridge mod_ucam_webauth up to 2.0.1. This vulnerability affects an unknown function. The manipulation of the argument kid as part of a HTTP Response leads to a path traversal vulnerability. The CWE definition for the vulnerability is CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

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.

The weakness was released 05/13/2019. This vulnerability was named CVE-2015-9287 since 05/01/2019. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1006.

Upgrading to version 2.0.2 eliminates this vulnerability.

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Productinfo

Vendor

• University of Cambridge

Name

• mod_ucam_webauth

Version

• 2.0.0
• 2.0.1

CPE 2.3info

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CPE 2.2info

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