Vulnerability Details : CVE-2019-7663
Potential exploit
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.
Vulnerability category: Denial of service
Products affected by CVE-2019-7663
- cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
- cpe:2.3:a:libtiff:libtiff:4.0.10:*:*:*:*:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:esm:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:*
- cpe:2.3:o:opensuse:leap:15.0:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2019-7663
0.62%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 69 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2019-7663
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
4.3
|
MEDIUM | AV:N/AC:M/Au:N/C:N/I:N/A:P |
8.6
|
2.9
|
NIST | |
|
6.5
|
MEDIUM | CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H |
2.8
|
3.6
|
NIST |
References for CVE-2019-7663
-
https://usn.ubuntu.com/3906-2/
USN-3906-2: LibTIFF vulnerabilities | Ubuntu security noticesThird Party Advisory
-
http://bugzilla.maptools.org/show_bug.cgi?id=2833
Bug 2833 – There is a Segmentation fault at tiffcp.c:1245 in cpSeparateBufToContigBuf (CVE-2019-7663)Exploit;Issue Tracking;Third Party Advisory;Patch
-
https://gitlab.com/libtiff/libtiff/commit/802d3cbf3043be5dce5317e140ccb1c17a6a2d39
TIFFWriteDirectoryTagTransferfunction() : fix NULL dereferencing (802d3cbf) · Commits · libtiff / libtiff · GitLabPatch;Third Party Advisory
-
https://lists.debian.org/debian-lts-announce/2019/02/msg00026.html
[SECURITY] [DLA 1680-1] tiff security updateMailing List;Third Party Advisory
-
https://usn.ubuntu.com/3906-1/
USN-3906-1: LibTIFF vulnerabilities | Ubuntu security noticesThird Party Advisory
-
https://security.gentoo.org/glsa/202003-25
libTIFF: Multiple vulnerabilities (GLSA 202003-25) — Gentoo security
-
http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00041.html
[security-announce] openSUSE-SU-2019:1161-1: moderate: Security update fMailing List;Third Party Advisory
-
https://www.debian.org/security/2020/dsa-4670
Debian -- Security Information -- DSA-4670-1 tiff
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