CVE-2021-23191: Null Pointer Dereference
First published: Wed Jun 02 2021(Updated: )
A flaw was found in htmldoc in versions prior to 1.9.12. NULL pointer dereference in function image_load_jpeg(),in image.cxx may result in code execution and denial of service. Reference: <a href="https://github.com/michaelrsweet/htmldoc/issues/415">https://github.com/michaelrsweet/htmldoc/issues/415</a> Upstream patch: <a href="https://github.com/michaelrsweet/htmldoc/commit/369b2ea1fd0d0537ba707f20a2f047b6afd2fbdc">https://github.com/michaelrsweet/htmldoc/commit/369b2ea1fd0d0537ba707f20a2f047b6afd2fbdc</a>
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 1.9.18-1 |
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Reference Links
- https://bugzilla.redhat.com/show_bug.cgi?id=1967022
- https://github.com/michaelrsweet/htmldoc/commit/369b2ea1fd0d0537ba707f20a2f047b6afd2fbdc
- https://github.com/michaelrsweet/htmldoc/issues/415
- https://ubuntu.com/security/CVE-2021-23191
- https://launchpad.net/bugs/cve/CVE-2021-23191
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1967025
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1967024
- https://access.redhat.com/security/cve/CVE-2021-26252
- https://security-tracker.debian.org/tracker/CVE-2021-23191
- https://www.cve.org/CVERecord?id=CVE-2021-23191
- https://nvd.nist.gov/vuln/detail/CVE-2021-23191
Frequently Asked Questions
What is CVE-2021-23191?
CVE-2021-23191 is a security vulnerability found in htmldoc v1.9.12 and before that can result in denial of service due to a NULL pointer dereference in the image_load_jpeg() function.
What is the severity of CVE-2021-23191?
CVE-2021-23191 has a severity level of 7.8 (High).
How does CVE-2021-23191 affect the affected software?
CVE-2021-23191 affects htmldoc v1.9.12 and earlier versions, potentially leading to denial of service.
How can I fix CVE-2021-23191?
To fix CVE-2021-23191, it is recommended to update htmldoc to a version that includes the necessary security patches or apply the provided fixes from the vendor.
Where can I find more information about CVE-2021-23191?
More information about CVE-2021-23191 can be found at the following references: [CVE Details](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-23191), [GitHub Issue](https://github.com/michaelrsweet/htmldoc/issues/415), [GitHub Commit](https://github.com/michaelrsweet/htmldoc/commit/369b2ea1fd0d0537ba707f20a2f047b6afd2fbdc).
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