Imager vulnerabilities

The vulnerability in the Imager library for Perl before version 1.033 mishandles unsigned EXIF IFD entry counts as signed, potentially leading to an attempt to allocate a huge memory block and process crash. An attacker can exploit this by crafting an image with malicious EXIF data to terminate a worker process.

Imager versions from 0.45_02 before 1.034 for Perl may expose adjacent heap bytes via strlen() over-read from zero-count ASCII EXIF entries in copy_string_tags. An attacker can supply an image with such an entry, leading to heap data leakage into the exif_* tag.

In the Imager library for Perl before version 1.032, there is a heap out-of-bounds read vulnerability in the Imager::File::SGI module. The issue is in the read_rgb_16_rle function, which incorrectly checks the pixel count in an RLE run, leading to a read past the buffer. An attacker can exploit this by providing a crafted SGI image, potentially causing a process crash.