The isfootnote function in markdown.c in libmarkdown.a in DISCOUNT 2.2.3a allows remote attackers to cause a denial of service (heap-based buffer over-read) via a crafted file, as demonstrated by mkd2html.

The remote Redhat Enterprise Linux 8 host has one or more packages installed that are affected by multiple vulnerabilities that have been acknowledged by the vendor but will not be patched.

  - discount: heap-based buffer over-read via a crafted file (CVE-2018-12495)

  - The __mkd_trim_line function in mkdio.c in libmarkdown.a in DISCOUNT 2.2.3a allows remote attackers to     cause a denial of service (heap-based buffer over-read) via a crafted file, as demonstrated by mkd2html.
    (CVE-2018-11468)

  - The isfootnote function in markdown.c in libmarkdown.a in DISCOUNT 2.2.3a allows remote attackers to cause     a denial of service (heap-based buffer over-read) via a crafted file, as demonstrated by mkd2html.
    (CVE-2018-11503)

Note that Nessus has not tested for these issues but has instead relied on the package manager's report that the package is installed.

Upstream version 2.2.4

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website.
Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Several heap buffer overflows were found in discount, an implementation of the Markdown markup language, that could be triggered with specially crafted Markdown data and would cause discount to read past the end of internal buffers.

Several heap-based buffer over-reads were found in discount, an implementation of the Markdown markup language in C, that allowed remote attackers to cause a denial of service via specially crafted files.

For Debian 8 'Jessie', these problems have been fixed in version 2.1.7-1+deb8u1.

We recommend that you upgrade your discount packages.

NOTE: Tenable Network Security has extracted the preceding description block directly from the DLA security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

ID	Name	Product	Family	Severity
199471	RHEL 8 : discount (Unpatched Vulnerability)	Nessus	Red Hat Local Security Checks	medium
120354	Fedora 28 : discount (2018-38bdbafa96)	Nessus	Fedora Local Security Checks	medium
117503	Debian DSA-4293-1 : discount - security update	Nessus	Debian Local Security Checks	medium
117367	Debian DLA-1499-1 : discount security update	Nessus	Debian Local Security Checks	medium

Detections

Analytics

CVE-2018-11503

medium

Tenable Plugins

medium

medium

medium

medium