Summaryinfo

A vulnerability categorized as problematic has been discovered in Google Chrome OS 25.0.1364.173. The impacted element is an unknown function of the file pango-utils.c of the component .pangorc. Executing a manipulation of the argument environment can lead to link following. This vulnerability is tracked as CVE-2013-0927. No exploit exists. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Google Chrome OS 25.0.1364.173 (Web Browser). It has been declared as critical. This vulnerability affects an unknown functionality of the file pango-utils.c of the component .pangorc. The manipulation of the argument environment with an unknown input leads to a link following vulnerability. The CWE definition for the vulnerability is CWE-59. The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

Google Chrome OS before 26.0.1410.57 relies on a Pango pango-utils.c read_config implementation that loads the contents of the .pangorc file in the user s home directory, and the file referenced by the PANGO_RC_FILE environment variable, which allows attackers to bypass intended access restrictions via crafted configuration data.

The weakness was disclosed 04/08/2013 by Pinkie Pie as not defined changelog entry (Website). The advisory is available at googlechromereleases.blogspot.ch. The public release has been coordinated in cooperation with the vendor. This vulnerability was named CVE-2013-0927 since 01/07/2013. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 05/05/2018). It is expected to see the exploit prices for this product increasing in the near future.

Upgrading to version 26.0.1410.57 eliminates this vulnerability. The upgrade is hosted for download at git.chromium.org. Applying a patch is able to eliminate this problem. The bugfix is ready for download at git.chromium.org. The best possible mitigation is suggested to be upgrading to the latest version. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at OSVDB (92256†). Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

• Web Browser

Vendor

• Google

Name

• Chrome OS

Version

• 25.0.1364.173

License

• free

Website

• Vendor: https://www.google.com/

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