CVE-2021-23180: Null Pointer Dereference
First published: Wed Jun 02 2021(Updated: )
A flaw was found in htmldoc in v1.9.12 and before. Null pointer dereference in file_extension(),in file.c may lead to execute arbitrary code and denial of service.
Credit: secalert@redhat.com secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Htmldoc Project Htmldoc | <=1.9.12 | |
| redhat/htmldoc | <1.9.12 | 1.9.12 |
| debian/htmldoc | 1.9.11-4+deb11u3 1.9.16-1 1.9.18-3 |
Never miss a vulnerability like this again
Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.
Reference Links
- https://bugzilla.redhat.com/show_bug.cgi?id=1967041
- https://github.com/michaelrsweet/htmldoc/commit/19c582fb32eac74b57e155cffbb529377a9e751a
- https://github.com/michaelrsweet/htmldoc/issues/418
- https://ubuntu.com/security/CVE-2021-23180
- https://launchpad.net/bugs/cve/CVE-2021-23180
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1967044
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1967043
- https://security-tracker.debian.org/tracker/CVE-2021-23180
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-23180
- https://nvd.nist.gov/vuln/detail/CVE-2021-23180
Frequently Asked Questions
What is CVE-2021-23180?
CVE-2021-23180 is a vulnerability found in htmldoc version 1.9.12 and earlier, which can lead to arbitrary code execution and denial of service.
How severe is CVE-2021-23180?
CVE-2021-23180 has a severity score of 7.8 (high).
What is the affected software of CVE-2021-23180?
The affected software of CVE-2021-23180 includes htmldoc version 1.9.12, as well as certain versions from different distributions such as Red Hat, Ubuntu, and Debian.
How can CVE-2021-23180 be exploited?
CVE-2021-23180 can be exploited through null pointer dereference in the file_extension() function in file.c.
Is there a fix for CVE-2021-23180?
Yes, fixes for CVE-2021-23180 are available. Please refer to the references provided for more information.
- collector/nvd-index
- agent/author
- agent/type
- agent/remedy
- agent/first-publish-date
- collector/launchpad-cve
- source/Launchpad
- collector/nvd-cve
- source/NVD
- agent/software-canonical-lookup
- collector/redhat-bugzilla
- source/Red Hat
- alias/CVE-2021-23180
- agent/severity
- collector/mitre-cve
- source/MITRE
- agent/weakness
- agent/last-modified-date
- agent/description
- agent/references
- agent/event
- agent/tags
- collector/security-tracker-debian
- source/Debian
- agent/softwarecombine
- collector/usn-cve
- source/Ubuntu
- vendor/htmldoc project
- canonical/htmldoc project htmldoc
- version/htmldoc project htmldoc/1.9.12
- package-manager/redhat
- package-manager/debian