CVE-2018-18661: Null Pointer Dereference
First published: Fri Oct 26 2018(Updated: )
An issue was discovered in LibTIFF 4.0.9. There is a NULL pointer dereference in the function LZWDecode in the file tif_lzw.c.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| debian/tiff | 4.2.0-1+deb11u5 4.2.0-1+deb11u6 4.5.0-6+deb12u2 4.5.0-6+deb12u1 4.5.1+git230720-5 | |
| tiff | =4.0.9 | |
| Ubuntu | =14.04 | |
| Ubuntu | =16.04 | |
| Ubuntu | =18.04 | |
| Ubuntu | =18.10 |
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Reference Links
- http://bugzilla.maptools.org/show_bug.cgi?id=2819
- http://www.securityfocus.com/bid/105762
- https://access.redhat.com/errata/RHSA-2019:2053
- https://lists.debian.org/debian-lts-announce/2019/11/msg00027.html
- https://usn.ubuntu.com/3864-1/
- https://launchpad.net/bugs/cve/CVE-2018-18661
- https://gitlab.com/libtiff/libtiff/commit/99b10edde9a0fc28cc0e7b7757aa18ac4c8c225f
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1644449
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1644451
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1644450
- https://access.redhat.com/support/policy/updates/errata/
- https://access.redhat.com/security/cve/cve-2018-18661
- https://bugzilla.redhat.com/show_bug.cgi?id=1644448
- https://security-tracker.debian.org/tracker/CVE-2018-18661
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-18661
- https://nvd.nist.gov/vuln/detail/CVE-2018-18661
- https://ubuntu.com/security/CVE-2018-18661
Frequently Asked Questions
What is the severity of CVE-2018-18661?
CVE-2018-18661 has a medium severity due to the potential for a denial of service through NULL pointer dereference.
How do I fix CVE-2018-18661?
To mitigate CVE-2018-18661, upgrade to LibTIFF version 4.2.0-1+deb11u5 or later for Debian systems.
What software is affected by CVE-2018-18661?
CVE-2018-18661 affects LibTIFF version 4.0.9 as well as various versions of the tiff package in Debian and Ubuntu Linux.
What type of vulnerability is CVE-2018-18661?
CVE-2018-18661 is a NULL pointer dereference vulnerability found in the LZWDecode function of LibTIFF.
Can CVE-2018-18661 lead to system compromise?
CVE-2018-18661 is primarily a denial of service vulnerability and does not directly lead to remote code execution or system compromise.
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