Linux Security
    Linux Security
    Linux Security

    Fedora 32: pngcheck 2020-daffd78c3d

    Date 22 Dec 2020
    393
    Posted By LinuxSecurity Advisories
    Previous fix for buffer overrun printing the contents of the sPLT chunk in certain malformed inputs (RHBZ#1905775) was incomplete; it should be properly fixed now. ---- Security fix for multiple buffer overflows from crafted file input (RHBZ#1902786,1902806,1902810: no CVE yet assigned), and for buffer overrun printing the contents of the sPLT chunk in certain malformed inputs
    --------------------------------------------------------------------------------
    Fedora Update Notification
    FEDORA-2020-daffd78c3d
    2020-12-23 01:03:28.556301
    --------------------------------------------------------------------------------
    
    Name        : pngcheck
    Product     : Fedora 32
    Version     : 2.4.0
    Release     : 5.fc32
    URL         : https://www.libpng.org/pub/png/apps/pngcheck.html
    Summary     : Verifies the integrity of PNG, JNG and MNG files
    Description :
    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.
    
    --------------------------------------------------------------------------------
    Update Information:
    
    Previous fix for buffer overrun printing the contents of the sPLT chunk in
    certain malformed inputs (RHBZ#1905775) was incomplete; it should be properly
    fixed now.  ----  Security fix for multiple buffer overflows from crafted file
    input (RHBZ#1902786,1902806,1902810: no CVE yet assigned), and for buffer
    overrun printing the contents of the sPLT chunk in certain malformed inputs
    (RHBZ#1905775: no tracking bug or CVE yet assigned); also, new eXIf support and
    assorted small bug fixes
    --------------------------------------------------------------------------------
    ChangeLog:
    
    * Mon Dec 14 2020 Benjamin A. Beasley  - 2.4.0-5
    - Previous fix for buffer overrun printing the contents of the sPLT chunk in
      certain malformed inputs (RHBZ#1905775) was incomplete; it should be properly
      fixed now.
    * Sun Dec 13 2020 Benjamin A. Beasley  - 2.4.0-4
    - Bounds-check all accesses into enumerated-value name arrays; a malformed file
      could have caused a buffer overrun in several of these cases. (RHBZ#1902810)
    - Fix buffer overrun when print_buffer() is passed a nonpositive size, which
      can occur in practice for certain malformed inputs. (RHBZ#1902810)
    - In some cases, the chunk length from the file data (sz) is used to index into
      the read buffer without sufficient bounds-checking, leading to a buffer
      overrun. Fix this for PPLT, hIST, sCAL, FRAM, SAVE, nEED, PAST, DISC, DROP,
      DBYK, ORDR, and SEEK chunks. (RHBZ#1902810)
    - Fix buffer overrun printing the contents of the sPLT chunk in certain
      malformed inputs. (RHBZ#1905775)
    - Backport fix for off-by-one bug in check_magic() from 3.0.0
    - Backport fix for zlib version warnings going to stdout from 3.0.0
    - Use name macro when referencing patches.
    - Add BR on make in anticipation of
      https://fedoraproject.org/wiki/Changes/Remove_make_from_BuildRoot.
    - New upstream version 2.4.0
    - Added new license file for main package (same MIT-style license)
    - Drop format-security patch, now upstreamed
    - Use upstreamed man pages; no need to generate with help2man anymore
    - Add rpmlintrc rules for -extras subpackage
    - Add rpmlintrc file to suppress spurious rpmlint warnings
    --------------------------------------------------------------------------------
    References:
    
      [ 1 ] Bug #1902806 - pngcheck: Multiple buffer overflows from crafted file input
            https://bugzilla.redhat.com/show_bug.cgi?id=1902806
    --------------------------------------------------------------------------------
    
    This update can be installed with the "dnf" update program. Use
    su -c 'dnf upgrade --advisory FEDORA-2020-daffd78c3d' at the command
    line. For more information, refer to the dnf documentation available at
    https://dnf.readthedocs.io/en/latest/command_ref.html#upgrade-command-label
    
    All packages are signed with the Fedora Project GPG key. More details on the
    GPG keys used by the Fedora Project can be found at
    https://fedoraproject.org/keys
    --------------------------------------------------------------------------------
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