CVE-2018-20024: Null Pointer Dereference
First published: Wed Dec 19 2018(Updated: )
Last updated 24 July 2024
Credit: vulnerability@kaspersky.com vulnerability@kaspersky.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Libvnc Project Libvncserver | <0.9.12 | |
| Canonical Ubuntu Linux | =14.04 | |
| Canonical Ubuntu Linux | =16.04 | |
| Canonical Ubuntu Linux | =18.04 | |
| Canonical Ubuntu Linux | =18.10 | |
| Debian Debian Linux | =8.0 | |
| Debian Debian Linux | =9.0 | |
| debian/libvncserver | 0.9.13+dfsg-2+deb11u1 0.9.14+dfsg-1 | |
| debian/ssvnc | 1.0.29-5 1.0.29-6 1.0.29-6.1 | |
| debian/veyon | 4.5.3+repack1-1 4.7.5+repack1-1 4.7.5+repack1-1.2 |
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Reference Links
- https://ics-cert.kaspersky.com/advisories/klcert-advisories/2018/12/19/klcert-18-034-libvnc-null-pointer-dereference/
- https://lists.debian.org/debian-lts-announce/2018/12/msg00017.html
- https://lists.debian.org/debian-lts-announce/2019/10/msg00042.html
- https://lists.debian.org/debian-lts-announce/2019/11/msg00033.html
- https://security.gentoo.org/glsa/201908-05
- https://security.gentoo.org/glsa/202006-06
- https://usn.ubuntu.com/3877-1/
- https://usn.ubuntu.com/4547-1/
- https://usn.ubuntu.com/4547-2/
- https://usn.ubuntu.com/4587-1/
- https://www.debian.org/security/2019/dsa-4383
- https://launchpad.net/bugs/cve/CVE-2018-20024
- https://github.com/LibVNC/libvncserver/issues/254
- https://github.com/LibVNC/libvncserver/commit/4a21bbd097ef7c44bb000c3bd0907f96a10e4ce7
- https://security-tracker.debian.org/tracker/CVE-2018-20024
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-20024
- https://nvd.nist.gov/vuln/detail/CVE-2018-20024
- https://ubuntu.com/security/CVE-2018-20024
Frequently Asked Questions
What is CVE-2018-20024?
CVE-2018-20024 is a vulnerability in LibVNC that involves a null pointer dereference in VNC client code, which can result in a denial-of-service (DoS) attack.
How severe is CVE-2018-20024?
CVE-2018-20024 has a severity rating of 7.5, which is considered high.
What software is affected by CVE-2018-20024?
The affected software includes LibVNC versions up to exclusive 0.9.11+dfsg-1.1ubuntu0.1, 0.9.11+dfsg-1ubuntu1.1, 0.9.9+dfsg-1ubuntu1.4, and 0.9.11+dfsg-1.2.
How can I fix CVE-2018-20024?
To fix CVE-2018-20024, update your LibVNC installation to version 0.9.11+dfsg-1.1ubuntu0.1 or later.
Where can I find more information about CVE-2018-20024?
You can find more information about CVE-2018-20024 on the GitHub page for LibVNC, as well as on the ICS-CERT advisory.
- collector/nvd-index
- agent/type
- agent/first-publish-date
- collector/launchpad-cve
- source/Launchpad
- agent/author
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- source/Ubuntu
- vendor/libvnc project
- canonical/libvnc project libvncserver
- vendor/canonical
- canonical/canonical ubuntu linux
- version/canonical ubuntu linux/14.04
- version/canonical ubuntu linux/16.04
- version/canonical ubuntu linux/18.04
- version/canonical ubuntu linux/18.10
- vendor/debian
- canonical/debian debian linux
- version/debian debian linux/8.0
- version/debian debian linux/9.0
- package-manager/debian