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CVE-2018-6612.patch
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File CVE-2018-6612.patch of Package jhead.7770
From: Ludovic Rousseau <rousseau@debian.org> Date: Sat, 3 Feb 2018 10:23:09 +0100 Subject: Fix heap buffer overflow Upstream: dead Bug-Debian: http://bugs.debian.org/889272 Fixed an integer underflow bug in the process_EXIF function of the exif.c file of raises a heap-based buffer over-read when processing a malicious JPEGfile, which may allow a remote attacker to cause a DoS CVE-2018-6612 boo#1079349 --- jhead-3.00.orig/exif.c +++ jhead-3.00/exif.c @@ -1019,7 +1019,7 @@ void process_EXIF (unsigned char * ExifS FirstOffset = Get32u(ExifSection+12); if (FirstOffset < 8 || FirstOffset > 16){ - if (FirstOffset < 16 || FirstOffset > length-16){ + if (FirstOffset < 16 || length < 16 || FirstOffset > length-16){ ErrNonfatal("invalid offset for first Exif IFD value",0,0); return; }
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