Fedora 31: FEDORA-2020-27b168926a Critical: Pngcheck Buffer Overflow

pngcheck verifies the integrity of PNG, JNG and MNG files (by checking the

internal 32-bit CRCs [checksums] and decompressing the image data); it can

optionally dump almost all of the chunk-level information in the image in

human-readable form. For example, it can be used to print the basic statistics

about an image (dimensions, bit depth, etc.); to list the color and

transparency info in its palette (assuming it has one); or to extract the

embedded text annotations. This is a command-line program with batch

capabilities.

The current release supports all PNG, MNG and JNG chunks, including the newly

approved sTER stereo-layout chunk. It correctly reports errors in all but two

of the images in Chris Nokleberg's brokensuite-20061204.

Fix buffer overflow (RHBZ #1897485) A global buffer overflow was discovered in

the check_chunk_name function via a crafted png file.

* Fri Nov 13 2020 Benjamin A. Beasley - 2.3.0-4

- Fix buffer overflow (RHBZ #1897485)

[ 1 ] Bug #1897485 - Private bug

https://bugzilla.redhat.com/show_bug.cgi?id=1897485

su -c 'dnf upgrade --advisory FEDORA-2020-27b168926a' at the command

line. For more information, refer to the dnf documentation available at

https://dnf.readthedocs.io/en/latest/command_ref.html

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