NULL pointer dereference in Libtiff
CVE-2018-7456
A NULL Pointer Dereference occurs in the function TIFFPrintDirectory in tif_print.c in LibTIFF 3.9.3, 3.9.4, 3.9.5, 3.9.6, 3.9.7, 4.0.0alpha4, 4.0.0alpha5, 4.0.0alpha6, 4.0.0beta7, 4.0.0, 4.0.1, 4.0.2, 4.0.3, 4.0.4, 4.0.4beta, 4.0.5, 4.0.6, 4.0.7, 4.0.8 and 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.)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.030 (86.8th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 87th percentile — 86.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.030 · newest: 0.030 · change: 0.000
Affected products
- Libtiff — versions 4.0.9
- Canonical Ubuntu Linux — versions 14.04, 16.04, 18.04
- Debian Linux — versions 7.0, 8.0, 9.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- lists.debian.org/debian-lts-announce/2018/04/msg00011.html (mailing-list, Mailing List, Third Party Advisory)
- usn.ubuntu.com/3864-1/ (vendor-advisory, Third Party Advisory)
- www.debian.org/security/2018/dsa-4349 (vendor-advisory, Third Party Advisory)
- github.com/xiaoqx/pocs/tree/master/libtiff (Exploit, Third Party Advisory)
- bugzilla.maptools.org/show_bug.cgi (Exploit, Third Party Advisory, Issue Tracking)
- lists.debian.org/debian-lts-announce/2018/07/msg00002.html (mailing-list, Mailing List, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2018/04/msg00010.html (mailing-list, Mailing List, Third Party Advisory)
- gitlab.com/libtiff/libtiff/commit/be4c85b16e8801a16eec25e80eb9f3dd6a96731b (Patch, Third Party Advisory)
- access.redhat.com/errata/RHSA-2019:2051 (vendor-advisory)
- access.redhat.com/errata/RHSA-2019:2053 (vendor-advisory)
Frequently asked questions
- What is CVE-2018-7456?
- CVE-2018-7456 is a medium-severity vulnerability in Libtiff, classified under NULL Pointer Dereference. CVSS score: 6.5/10. Published 2018-02-24.
- How severe is CVE-2018-7456?
- Medium severity. CVSS v3 base score is 6.5 out of 10.
- Is CVE-2018-7456 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.