CVE-2018-7456 Information

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.)

CVSS Vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Reference

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

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

REQUIRED

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

6.5