A vulnerability was found in unrar-free 0.0.1. It has been rated as critical. Affected by this issue is the function ExtrFile/stricomp in the library unrarlib.c. The manipulation 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:

unrar 0.0.1 (aka unrar-free or unrar-gpl) suffers from a stack-based buffer over-read in unrarlib.c, related to ExtrFile and stricomp.

The bug was discovered 08/20/2017. The weakness was published 09/03/2017 (Website). The advisory is shared for download at openwall.com. This vulnerability is handled as CVE-2017-14122 since 09/03/2017. The attack may be launched remotely. No form of authentication is required for exploitation. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available.

The vulnerability was handled as a non-public zero-day exploit for at least 14 days. During that time the estimated underground price was around $0-$5k.

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

Similar entries are available at 106098 and 106099.

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• unrar-free

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• 0.0.1

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