A vulnerability, which was classified as critical, was found in FontForge (affected version not known). This affects the function umodenc of the file parsettf.c of the component OTF File Handler. The manipulation with an unknown input leads to a memory corruption vulnerability. CWE is classifying the issue as 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. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

FontForge 20161012 is vulnerable to a buffer over-read in umodenc (parsettf.c) resulting in DoS or code execution via a crafted otf file.

The bug was discovered 07/23/2017. The weakness was released 07/23/2017 (Website). The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2017-11570 since 07/23/2017. 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 are known, but no exploit is available.

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

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