Cross-site scripting (XSS) vulnerability in the _keyify function in mistune.py in Mistune before 0.8.1 allows remote attackers to inject arbitrary web script or HTML by leveraging failure to escape the "key" argument.

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

  - Cross-site scripting (XSS) vulnerability in the _keyify function in mistune.py in Mistune before 0.8.1     allows remote attackers to inject arbitrary web script or HTML by leveraging failure to escape the key     argument. (CVE-2017-16876)

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

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - Cross-site scripting (XSS) vulnerability in the _keyify function in mistune.py in Mistune before 0.8.1
    allows remote attackers to inject arbitrary web script or HTML by leveraging failure to escape the "key"
    argument. (CVE-2017-16876)

This update for python-mistune to version 0.8.3 fixes several issues.

These security issues were fixed :

  - CVE-2017-16876: Cross-site scripting (XSS) vulnerability     in the _keyify function in mistune.py allowed remote     attackers to inject arbitrary web script or HTML by     leveraging failure to escape the 'key' argument     (bsc#1072307).

  - CVE-2017-15612: Prevent XSS via an unexpected newline     (such as in java\nscript:) or a crafted email address,     related to the escape and autolink functions     (bsc#1064640).

These non-security issues were fixed :

  - Fix nested html issue

  - Fix _keyify with lower case.

  - Remove non breaking spaces preprocessing

  - Remove rev and rel attribute for footnotes

  - Fix escape_link method 

  - Handle block HTML with no content 

  - Use expandtabs for tab

  - Fix escape option for text renderer

  - Fix HTML attribute regex pattern

  - Fix strikethrough regex

  - Fix HTML attribute regex

  - Fix close tag regex

  - Fix hard_wrap options on renderer.

  - Fix emphasis regex pattern

  - Fix base64 image link 

  - Fix link security per

  - Fix inline html when there is no content per

Update to 0.8.3, fixing CVE-2017-15612 and CVE-2017-16876

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.

ID	Name	Product	Family	Severity
255963	Linux Distros Unpatched Vulnerability : CVE-2017-16876	Nessus	Misc.	medium
422502	SCA: security update for mistune (GHSA-98gj-wwxm-cj3h)	Tenable Cloud Security	SCA Checks	medium
422502	SCA: security update for mistune (GHSA-98gj-wwxm-cj3h)	Tenable Self-Hosted Container Security	SCA Checks	medium
106703	openSUSE Security Update : python-mistune (openSUSE-2018-148)	Nessus	SuSE Local Security Checks	medium
105846	Fedora 27 : python-mistune (2017-2eefd424bd)	Nessus	Fedora Local Security Checks	medium
105474	Fedora 26 : python-mistune (2017-7b4149911a)	Nessus	Fedora Local Security Checks	medium

Detections

Analytics

CVE-2017-16876

medium

Tenable Plugins

medium

medium

medium

medium

medium

medium