Mageia 2020-0040: libjpeg security update

    Date17 Jan 2020
    167
    Posted ByLinuxSecurity Advisories
    The updated packages fix security vulnerabilities: A signed integer overflow and subsequent segfault that occurred when attempting to decompress images with more than 715827882 pixels using the 64-bit C version of TJBench.
    MGASA-2020-0040 - Updated libjpeg packages fix security vulnerabilities
    
    Publication date: 17 Jan 2020
    URL: https://advisories.mageia.org/MGASA-2020-0040.html
    Type: security
    Affected Mageia releases: 7
    
    The updated packages fix security vulnerabilities:
    
    A signed integer overflow and subsequent segfault that occurred when
    attempting to decompress images with more than 715827882 pixels using
    the 64-bit C version of TJBench.
    
    Out-of-bounds write in tjDecompressToYUV2() and tjDecompressToYUVPlanes()
    (sometimes manifesting as a double free) that occurred when attempting to
    decompress grayscale JPEG images that were compressed with a sampling
    factor other than 1 (for instance, with cjpeg -grayscale -sample 2x2).
    
    A regression introduced by 2.0.2[5] that caused the TurboJPEG API to
    incorrectly identify some JPEG images with unusual sampling factors as
    4:4:4 JPEG images. This was known to cause a buffer overflow when
    attempting to decompress some such images using tjDecompressToYUV2()
    or tjDecompressToYUVPlanes().
    
    An issue, detected by ASan, whereby attempting to losslessly transform
    a specially-crafted malformed JPEG image containing an extremely-high-
    frequency coefficient block (junk image data that could never be
    generated by a legitimate JPEG compressor) could cause the Huffman
    encoder's local buffer to be overrun.
    
    References:
    - https://bugs.mageia.org/show_bug.cgi?id=26057
    - https://github.com/libjpeg-turbo/libjpeg-turbo/releases/tag/2.0.4
    
    SRPMS:
    - 7/core/libjpeg-2.0.4-1.mga7
    
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