Slackware64-14.2 ChangeLog (2017-11-29)

Wed Nov 29 21:48:33 UTC 2017

Wed Nov 29 08:15:09 UTC 2017

  • patches/packages/libXcursor-1.1.15-x86_64-1_slack14.2.txz
    Fix heap overflows when parsing malicious files. (CVE-2017-16612)
    It is possible to trigger heap overflows due to an integer overflow
    while parsing images and a signedness issue while parsing comments.
    The integer overflow occurs because the chosen limit 0x10000 for
    dimensions is too large for 32 bit systems, because each pixel takes
    4 bytes. Properly chosen values allow an overflow which in turn will
    lead to less allocated memory than needed for subsequent reads.
    The signedness bug is triggered by reading the length of a comment
    as unsigned int, but casting it to int when calling the function
    XcursorCommentCreate. Turning length into a negative value allows the
    check against XCURSOR_COMMENT_MAX_LEN to pass, and the following
    addition of sizeof (XcursorComment) + 1 makes it possible to allocate
    less memory than needed for subsequent reads.
    For more information, see:
    (* Security fix *)
  • patches/packages/libXfont-1.5.1-x86_64-2_slack14.2.txz
    Open files with O_NOFOLLOW. (CVE-2017-16611)
    A non-privileged X client can instruct X server running under root
    to open any file by creating own directory with “fonts.dir”,
    “fonts.alias” or any font file being a symbolic link to any other
    file in the system. X server will then open it. This can be issue
    with special files such as /dev/watchdog (which could then reboot
    the system).
    For more information, see:
    (* Security fix *)
  • news/2017/11/29/slackware64-14.2-changelog.txt
  • Last modified: 5 years ago
  • by Giuseppe Di Terlizzi