A vulnerability was found in Apple iOS up to 6.1.3 (Smartphone Operating System) and classified as critical. Affected by this issue is the function openSharedCacheFile of the file dyld.cpp of the component Cache. The manipulation of the argument environment with an unknown input leads to a memory corruption vulnerability. Using CWE to declare the problem leads to CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. Impacted is confidentiality, integrity, and availability. CVE summarizes:

Stack-based buffer overflow in the openSharedCacheFile function in dyld.cpp in dyld in Apple iOS 5.1.x and 6.x through 6.1.3 makes it easier for attackers to conduct untethering attacks via a long string in the DYLD_SHARED_CACHE_DIR environment variable.

The weakness was shared 04/26/2013 by Stefan Esser with SektionEins GmbH as not defined advisory (Website). The advisory is available at antid0te.com. The vendor was not involved in the coordination of the public release. This vulnerability is handled as CVE-2013-3950 since 06/05/2013. The exploitation is known to be difficult. Access to the local network is required for this attack. The requirement for exploitation is a simple authentication. 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 05/14/2021). It is expected to see the exploit prices for this product increasing in the near future.

The vulnerability scanner Nessus provides a plugin with the ID 70257 (Apple TV < 6.0 Multiple Vulnerabilities), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Misc. and running in the context r.

Upgrading to version 7, eliminates this vulnerability. A possible mitigation has been published 6 months after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (70257). The entries 4661, 8303, 8559 and 8792 are related to this item.

Productinfo

Type

• Smartphone Operating System

Vendor

• Apple

Name

• iOS

Version

• 6.1.0
• 6.1.1
• 6.1.2
• 6.1.3

License

• commercial

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