Cisco Spark Browser 2015-07-04 X.509 Certificate Chain Validation information disclosure

Summaryinfo

A vulnerability was found in Cisco Spark Browser 2015-07-04 and classified as critical. The affected element is an unknown function of the component X.509 Certificate Chain Validation. Executing a manipulation can lead to information disclosure. This vulnerability is registered as CVE-2015-6303. No exploit is available.

Detailsinfo

A vulnerability classified as critical was found in Cisco Spark Browser 2015-07-04. This vulnerability affects an unknown code of the component X.509 Certificate Chain Validation. The manipulation with an unknown input leads to a information disclosure vulnerability. The CWE definition for the vulnerability is CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

The Cisco Spark application 2015-07-04 for mobile operating systems does not properly verify X.509 certificates from SSL servers, which allows man-in-the-middle attackers to spoof servers and obtain sensitive information via a crafted certificate, aka Bug IDs CSCut36742 and CSCut36844.

The weakness was published 09/24/2015 as CSCut36742 / CSCut36844 as confirmed advisory (Website). The advisory is shared for download at tools.cisco.com. This vulnerability was named CVE-2015-6303 since 08/17/2015. The exploitation appears to be difficult. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 12/30/2017). The MITRE ATT&CK project declares the attack technique as T1592.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Vendor

• Cisco

Name

• Spark Browser

Version

• 2015-07-04

License

• commercial

Website

• Vendor: https://www.cisco.com/

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