Fedora 33 FEDORA-2021-674d704f6c Moderate: 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.

Buffer overflow fixes: 1. Fix buffer overflow on large MNG LOOP chunk

(RHBZ#1908559). 2. Fix a buffer overrun for certain invalid MNG PPLT chunk

contents (RHBZ#1907428).

* Thu Jan 7 2021 Benjamin A. Beasley - 2.4.0-7

- Fix buffer overflow on large MNG LOOP chunk (RHBZ#1908559)

* Thu Jan 7 2021 Benjamin A. Beasley - 2.4.0-6

- Fix a buffer overrun for certain invalid MNG PPLT chunk contents

(RHBZ#1907428).

[ 1 ] Bug #1907428 - Private bug

https://bugzilla.redhat.com/show_bug.cgi?id=1907428

[ 2 ] Bug #1908559 - Private bug

https://bugzilla.redhat.com/show_bug.cgi?id=1908559

su -c 'dnf upgrade --advisory FEDORA-2021-674d704f6c' 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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https://fedoraproject.org/security/

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