Synopsis
Tenable discovered a denial of service vulnerability in libjpeg-turbo. The vulnerability is caused by a divide by zero error in the function allow_sarray in jmemmgr.c. The variable samplesperrow holds a value of zero when the following calculation occurs:
/* Calculate max # of rows allowed in one allocation chunk */
ltemp = (MAX_ALLOC_CHUNK - sizeof(large_pool_hdr)) /
((long)samplesperrow * sizeof(JSAMPLE));
A four component BMP whose BITMAPINFOHEADER has a biWidth of 1073741824 triggers this vulnerability.
Solution
A patch has been committed to the libjpeg-turbo GitHub repository.Additional References
https://github.com/libjpeg-turbo/libjpeg-turbo/commit/43e84cff1bb2bd8293066f6ac4eb0df61ddddbc6Disclosure Timeline
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