Vulnerability CVE-2018-7456
Published: 2018-02-24

Description:
A NULL Pointer Dereference occurs in the function TIFFPrintDirectory in tif_print.c in LibTIFF 4.0.9 when using the tiffinfo tool to print crafted TIFF information, a different vulnerability than CVE-2017-18013. (This affects an earlier part of the TIFFPrintDirectory function that was not addressed by the CVE-2017-18013 patch.)

Type:

CWE-476

 (NULL Pointer Dereference)

CVSS2 => (AV:N/AC:M/Au:N/C:N/I:N/A:P)

CVSS Base Score
Impact Subscore
Exploitability Subscore
4.3/10
2.9/10
8.6/10
Exploit range
Attack complexity
Authentication
Remote
Medium
No required
Confidentiality impact
Integrity impact
Availability impact
None
None
Partial
Affected software
Libtiff -> Libtiff 
Debian -> Debian linux 
Canonical -> Ubuntu linux 

 References:
http://bugzilla.maptools.org/show_bug.cgi?id=2778
https://access.redhat.com/errata/RHSA-2019:2051
https://github.com/xiaoqx/pocs/tree/master/libtiff
https://gitlab.com/libtiff/libtiff/commit/be4c85b16e8801a16eec25e80eb9f3dd6a96731b
https://lists.debian.org/debian-lts-announce/2018/04/msg00010.html
https://lists.debian.org/debian-lts-announce/2018/04/msg00011.html
https://lists.debian.org/debian-lts-announce/2018/07/msg00002.html
https://usn.ubuntu.com/3864-1/
https://www.debian.org/security/2018/dsa-4349
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