A flaw was found in LibTIFF 3.8.2 in TIFFWriteScanline function in tif_write.c. A heap-based buffer over-read, as demonstrated by bmp2tiff.
Created libtiff tracking bugs for this issue:
Affects: fedora-all [bug 1577316]
Created mingw-libtiff tracking bugs for this issue:
Affects: epel-7 [bug 1577314]
Affects: fedora-all [bug 1577315]
An integer overflow when computing the size of `td->td_stripbytecount` in TIFFSetupStrips allocates a buffer smaller than what is necessary, thus leading to a heap-based buffer overflow in TIFFWriteScanline when accessing the array.
This issue has been addressed in the following products:
Red Hat Enterprise Linux 7
Via RHSA-2019:2053 https://access.redhat.com/errata/RHSA-2019:2053
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):