ArchLinux: 201911-13: libtiff: denial of service

    Date03 Dec 2019
    CategoryArchLinux
    66
    Posted ByLinuxSecurity Advisories
    The package libtiff before version 4.1.0-1 is vulnerable to denial of service.
    Arch Linux Security Advisory ASA-201911-13
    ==========================================
    
    Severity: Medium
    Date    : 2019-11-13
    CVE-ID  : CVE-2019-6128 CVE-2019-7663
    Package : libtiff
    Type    : denial of service
    Remote  : Yes
    Link    : https://security.archlinux.org/AVG-886
    
    Summary
    =======
    
    The package libtiff before version 4.1.0-1 is vulnerable to denial of
    service.
    
    Resolution
    ==========
    
    Upgrade to 4.1.0-1.
    
    # pacman -Syu "libtiff>=4.1.0-1"
    
    The problems have been fixed upstream in version 4.1.0.
    
    Workaround
    ==========
    
    None.
    
    Description
    ===========
    
    - CVE-2019-6128 (denial of service)
    
    The TIFFFdOpen function in tif_unix.c in LibTIFF 4.0.10 has a memory
    leak, as demonstrated by pal2rgb.
    
    - CVE-2019-7663 (denial of service)
    
    An Invalid Address dereference was discovered in
    TIFFWriteDirectoryTagTransferfunction in libtiff/tif_dirwrite.c in
    LibTIFF 4.0.10, affecting the cpSeparateBufToContigBuf function in
    tiffcp.c. Remote attackers could leverage this vulnerability to cause a
    denial-of-service via a crafted tiff file.
    
    Impact
    ======
    
    A remote attacker is able to cause a denial of service.
    
    References
    ==========
    
    https://gitlab.com/libtiff/libtiff/commit/ae0bed1fe530a82faf2e9ea1775109dbf301a971
    https://gitlab.com/libtiff/libtiff/commit/802d3cbf3043be5dce5317e140ccb1c17a6a2d39
    https://gitlab.com/libtiff/libtiff/merge_requests/60
    https://security.archlinux.org/CVE-2019-6128
    https://security.archlinux.org/CVE-2019-7663
    
    
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