Exiv2 0.26 PSD Image Reader iptc.cpp decode Image File integer overflow

Summaryinfo

A vulnerability was found in Exiv2 0.26. It has been rated as critical. Affected by this issue is the function Exiv2::IptcParser::decode of the file iptc.cpp of the component PSD Image Reader. Performing a manipulation as part of Image File results in integer overflow. This vulnerability is reported as CVE-2018-19107. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability classified as critical has been found in Exiv2 0.26 (Image Processing Software). This affects the function Exiv2::IptcParser::decode of the file iptc.cpp of the component PSD Image Reader. The manipulation as part of a Image File leads to a integer overflow vulnerability. CWE is classifying the issue as CWE-190. The product performs a calculation that can produce an integer overflow or wraparound, when the logic assumes that the resulting value will always be larger than the original value. This can introduce other weaknesses when the calculation is used for resource management or execution control. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

In Exiv2 0.26, Exiv2::IptcParser::decode in iptc.cpp (called from psdimage.cpp in the PSD image reader) may suffer from a denial of service (heap-based buffer over-read) caused by an integer overflow via a crafted PSD image file.

The bug was discovered 09/01/2018. The weakness was disclosed 11/08/2018 (Website). It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2018-19107 since 11/08/2018. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability was handled as a non-public zero-day exploit for at least 68 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 176682 (Debian Security Update for exiv2 (DLA 1691-1)).

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

The entries VDB-126568, VDB-127103 and VDB-127916 are pretty similar. Be aware that VulDB is the high quality 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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