Bug 1649385 (CVE-2018-19210) - CVE-2018-19210 libtiff: NULL pointer dereference in TIFFWriteDirectorySec function in tif_dirwrite.c
Summary: CVE-2018-19210 libtiff: NULL pointer dereference in TIFFWriteDirectorySec fun...
Keywords:
Status: CLOSED WONTFIX
Alias: CVE-2018-19210
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1649387 1649388 1649389 1649391 1649392
Blocks: 1649390
TreeView+ depends on / blocked
 
Reported: 2018-11-13 14:41 UTC by Laura Pardo
Modified: 2020-12-17 10:01 UTC (History)
5 users (show)

Fixed In Version:
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Last Closed: 2018-11-16 09:45:50 UTC
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Description Laura Pardo 2018-11-13 14:41:15 UTC
In LibTIFF 4.0.9, there is a NULL pointer dereference in the TIFFWriteDirectorySec function in tif_dirwrite.c that will lead to a denial of service attack, as demonstrated by tiffset. 


References: 
http://bugzilla.maptools.org/show_bug.cgi?id=2820

Comment 1 Laura Pardo 2018-11-13 14:42:30 UTC
Created libtiff tracking bugs for this issue:

Affects: fedora-all [bug 1649387]


Created mingw-libtiff tracking bugs for this issue:

Affects: epel-7 [bug 1649388]
Affects: fedora-all [bug 1649389]

Comment 3 Huzaifa S. Sidhpurwala 2018-11-16 09:45:50 UTC
This is reproduce-able without ASAN builds as well. valgrind shows Null pointer deref with the following errors:

poc0: Failed to allocate memory for to read TIFF directory (0 elements of 12 bytes each).
TIFFReadDirectory: Failed to read directory at offset 5356.

Running without valgrind yeilds segfault.

There is no upstream patch yet.


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