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.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - 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. (CVE-2021-23180)

Note that Nessus relies on the presence of the package as reported by the vendor.

The remote host is affected by the vulnerability described in GLSA-202405-07 (HTMLDOC: Multiple Vulnerabilities)

    Multiple vulnerabilities have been discovered in HTMLDOC. Please review the CVE identifiers referenced     below for details.

Tenable has extracted the preceding description block directly from the Gentoo Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Ubuntu 20.04 LTS host has packages installed that are affected by a vulnerability as referenced in the USN-5198-1 advisory.

    It was discovered that HTMLDOC improperly handled malformed URIs from an input html file.

    An attacker could use this to cause a denial of service.

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Debian 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-2700 advisory.

    A buffer overflow was discovered in HTMLDOC, a HTML processor that generates indexed HTML, PS, and PDF,     which could potentially result in the execution of arbitrary code. In addition a number of crashes were     addressed. For Debian 9 stretch, these problems have been fixed in version 1.8.27-8+deb9u1. We recommend     that you upgrade your htmldoc packages. For the detailed security status of htmldoc please refer to its     security tracker page at: https://security-tracker.debian.org/tracker/htmldoc Further information about     Debian LTS security advisories, how to apply these updates to your system and frequently asked questions     can be found at: https://wiki.debian.org/LTS

Tenable has extracted the preceding description block directly from the Debian security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

A buffer overflow was discovered in HTMLDOC, a HTML processor that generates indexed HTML, PS, and PDF, which could potentially result in the execution of arbitrary code. In addition a number of crashes were addressed.

ID	Name	Product	Family	Severity
257769	Linux Distros Unpatched Vulnerability : CVE-2021-23180	Nessus	Misc.	high
194977	GLSA-202405-07 : HTMLDOC: Multiple Vulnerabilities	Nessus	Gentoo Local Security Checks	critical
156122	Ubuntu 20.04 LTS : HTMLDOC vulnerability (USN-5198-1)	Nessus	Ubuntu Local Security Checks	high
151219	Debian DLA-2700-1 : htmldoc - LTS security update	Nessus	Debian Local Security Checks	critical
150706	Debian DSA-4928-1 : htmldoc - security update	Nessus	Debian Local Security Checks	critical

Detections

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CVE-2021-23180

high

Tenable Plugins

high

critical

high

critical

critical