Exiv2 0.26 crwimage_int.cpp readDirectory resource consumption

Summaryinfo

A vulnerability classified as problematic was found in Exiv2 0.26. This affects the function CiffDirectory::readDirectory of the file crwimage_int.cpp. The manipulation results in resource consumption. This vulnerability is reported as CVE-2018-17581. The attack can be launched remotely. No exploit exists.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Exiv2 0.26 (Image Processing Software). Affected is the function CiffDirectory::readDirectory of the file crwimage_int.cpp. The manipulation with an unknown input leads to a resource consumption vulnerability. CWE is classifying the issue as CWE-400. The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources. This is going to have an impact on availability. CVE summarizes:

CiffDirectory::readDirectory() at crwimage_int.cpp in Exiv2 0.26 has excessive stack consumption due to a recursive function, leading to Denial of service.

The bug was discovered 09/26/2018. The weakness was disclosed 09/28/2018 (Website). The advisory is shared for download at github.com. This vulnerability is traded as CVE-2018-17581 since 09/28/2018. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1499.

The vulnerability was handled as a non-public zero-day exploit for at least 2 days. During that time the estimated underground price was around $0-$5k. The commercial vulnerability scanner Qualys is able to test this issue with plugin 197336 (Ubuntu Security Notification for Exiv2 Vulnerabilities (USN-3852-1)).

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

The vulnerability is also documented in the vulnerability database at SecurityFocus (BID 100030†). The entries VDB-101786, VDB-104439, VDB-104559 and VDB-107246 are pretty similar. Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

• Image Processing Software

Name

• Exiv2

Version

• 0.26

License

• free

Website

• Product: https://github.com/Exiv2/exiv2/

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Once again VulDB remains the best source for vulnerability data.

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