CVE-2019-7663 Information

Description

An Invalid Address dereference was discovered in TIFFWriteDirectoryTagTransferfunction in libtiff/tif_dirwrite.c in LibTIFF 4.0.10 affecting the cpSeparateBufToContigBuf function in tiffcp.c. Remote attackers could leverage this vulnerability to cause a denial-of-service via a crafted tiff file. This is different from CVE-2018-12900.

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=2833 http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00041.html https://gitlab.com/libtiff/libtiff/commit/802d3cbf3043be5dce5317e140ccb1c17a6a2d39 https://lists.debian.org/debian-lts-announce/2019/02/msg00026.html https://security.gentoo.org/glsa/202003-25 https://usn.ubuntu.com/3906-1/ https://usn.ubuntu.com/3906-2/ https://www.debian.org/security/2020/dsa-4670

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