Incomplete blacklist vulnerability in the lxml.html.clean module in lxml before 3.3.5 allows remote attackers to conduct cross-site scripting (XSS) attacks via control characters in the link scheme to the clean_html function.

The remote Redhat Enterprise Linux 7 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.

  - python-lxml: XSS in lxml.html.clean module in lxml/html/clean.py (CVE-2018-19787)

  - Incomplete blacklist vulnerability in the lxml.html.clean module in lxml before 3.3.5 allows remote     attackers to conduct cross-site scripting (XSS) attacks via control characters in the link scheme to the     clean_html function. (CVE-2014-3146)

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

The remote Redhat Enterprise Linux 6 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.

  - python-lxml: XSS in lxml.html.clean module in lxml/html/clean.py (CVE-2018-19787)

  - Incomplete blacklist vulnerability in the lxml.html.clean module in lxml before 3.3.5 allows remote     attackers to conduct cross-site scripting (XSS) attacks via control characters in the link scheme to the     clean_html function. (CVE-2014-3146)

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

The remote Redhat Enterprise Linux 5 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.

  - python-lxml: XSS in lxml.html.clean module in lxml/html/clean.py (CVE-2018-19787)

  - Incomplete blacklist vulnerability in the lxml.html.clean module in lxml before 3.3.5 allows remote     attackers to conduct cross-site scripting (XSS) attacks via control characters in the link scheme to the     clean_html function. (CVE-2014-3146)

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

According to the versions of the python-lxml package installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities :

  - Incomplete blacklist vulnerability in the     lxml.html.clean module in lxml before 3.3.5 allows     remote attackers to conduct cross-site scripting (XSS)     attacks via control characters in the link scheme to     the clean_html function.(CVE-2014-3146)

  - An issue was discovered in lxml before 4.2.5.
    lxml/html/clean.py in the lxml.html.clean module does     not remove javascript: URLs that use escaping, allowing     a remote attacker to conduct XSS attacks, as     demonstrated by 'j a v a s c r i p t:' in Internet     Explorer. This is a similar issue to     CVE-2014-3146.(CVE-2018-19787)

  - A XSS vulnerability was discovered in python-lxml's     clean module. The module's parser didn't properly     imitate browsers, which caused different behaviors     between the sanitizer and the user's page. A remote     attacker could exploit this flaw to run arbitrary     HTML/JS code.(CVE-2020-27783)

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

According to the versions of the python-lxml package installed, the EulerOS Virtualization for ARM 64 installation on the remote host is affected by the following vulnerabilities :

  - An issue was discovered in lxml before 4.2.5.
    lxml/html/clean.py in the lxml.html.clean module does     not remove javascript: URLs that use escaping, allowing     a remote attacker to conduct XSS attacks, as     demonstrated by 'j a v a s c r i p t:' in Internet     Explorer. This is a similar issue to     CVE-2014-3146.(CVE-2018-19787)

  - Incomplete blacklist vulnerability in the     lxml.html.clean module in lxml before 3.3.5 allows     remote attackers to conduct cross-site scripting (XSS)     attacks via control characters in the link scheme to     the clean_html function.(CVE-2014-3146)

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

According to the versions of the python-lxml package installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  - A XSS vulnerability was discovered in python-lxml's     clean module. The module's parser didn't properly     imitate browsers, which caused different behaviors     between the sanitizer and the user's page. A remote     attacker could exploit this flaw to run arbitrary     HTML/JS code.(CVE-2020-27783)

  - An issue was discovered in lxml before 4.2.5.
    lxml/html/clean.py in the lxml.html.clean module does     not remove javascript: URLs that use escaping, allowing     a remote attacker to conduct XSS attacks, as     demonstrated by 'j a v a s c r i p t:' in Internet     Explorer. This is a similar issue to     CVE-2014-3146.(CVE-2018-19787)

  - Incomplete blacklist vulnerability in the     lxml.html.clean module in lxml before 3.3.5 allows     remote attackers to conduct cross-site scripting (XSS)     attacks via control characters in the link scheme to     the clean_html function.(CVE-2014-3146)

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

According to the versions of the python-lxml package installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities :

  - A XSS vulnerability was discovered in python-lxml's     clean module. The module's parser didn't properly     imitate browsers, which caused different behaviors     between the sanitizer and the user's page. A remote     attacker could exploit this flaw to run arbitrary     HTML/JS code.(CVE-2020-27783)

  - Incomplete blacklist vulnerability in the     lxml.html.clean module in lxml before 3.3.5 allows     remote attackers to conduct cross-site scripting (XSS)     attacks via control characters in the link scheme to     the clean_html function.(CVE-2014-3146)

  - An issue was discovered in lxml before 4.2.5.
    lxml/html/clean.py in the lxml.html.clean module does     not remove javascript: URLs that use escaping, allowing     a remote attacker to conduct XSS attacks, as     demonstrated by 'j a v a s c r i p t:' in Internet     Explorer. This is a similar issue to     CVE-2014-3146.(CVE-2018-19787)

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

According to the versions of the python-lxml package installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  - Incomplete blacklist vulnerability in the     lxml.html.clean module in lxml before 3.3.5 allows     remote attackers to conduct cross-site scripting (XSS)     attacks via control characters in the link scheme to     the clean_html function.(CVE-2014-3146)

  - An issue was discovered in lxml before 4.2.5.
    lxml/html/clean.py in the lxml.html.clean module does     not remove javascript: URLs that use escaping, allowing     a remote attacker to conduct XSS attacks, as     demonstrated by 'j a v a s c r i p t:' in Internet     Explorer. This is a similar issue to     CVE-2014-3146.(CVE-2018-19787)

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

Updated python-lxml packages fix security vulnerability :

The clean_html() function, provided by the lxml.html.clean module, did not properly clean HTML input if it included non-printed characters (\x01-\x08). A remote attacker could use this flaw to serve malicious content to an application using the clean_html() function to process HTML, possibly allowing the attacker to inject malicious code into a website generated by this application (CVE-2014-3146).

This security update for python-lxml fixes a input sanitization flaw in clean_html. (CVE-2014-3146)

python-lxml was fixed to ensure proper input sanitization in clean_html (CVE-2014-3146).

It was discovered that clean_html() function of lxml (pythonic bindings for the libxml2 and libxslt libraries) performed insufficient sanitisation for some non-printable characters. This could lead to cross-site scripting.

The remote Ubuntu 14.04 LTS host has packages installed that are affected by a vulnerability as referenced in the USN-2217-1 advisory.

    It was discovered that the lxml.html.clean module incorrectly stripped control characters. An attacked     could potentially exploit this to conduct cross-site scripting (XSS) attacks.

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.

ID	Name	Product	Family	Severity
199645	RHEL 7 : python-lxml (Unpatched Vulnerability)	Nessus	Red Hat Local Security Checks	medium
199636	RHEL 6 : python-lxml (Unpatched Vulnerability)	Nessus	Red Hat Local Security Checks	medium
199613	RHEL 5 : python-lxml (Unpatched Vulnerability)	Nessus	Red Hat Local Security Checks	medium
151412	EulerOS Virtualization 3.0.2.2 : python-lxml (EulerOS-SA-2021-2162)	Nessus	Huawei Local Security Checks	medium
151345	EulerOS Virtualization for ARM 64 3.0.2.0 : python-lxml (EulerOS-SA-2021-2109)	Nessus	Huawei Local Security Checks	medium
149105	EulerOS 2.0 SP3 : python-lxml (EulerOS-SA-2021-1839)	Nessus	Huawei Local Security Checks	medium
147041	EulerOS Virtualization 3.0.6.6 : python-lxml (EulerOS-SA-2021-1514)	Nessus	Huawei Local Security Checks	medium
146712	EulerOS 2.0 SP2 : python-lxml (EulerOS-SA-2021-1352)	Nessus	Huawei Local Security Checks	medium
142071	EulerOS 2.0 SP5 : python-lxml (EulerOS-SA-2020-2296)	Nessus	Huawei Local Security Checks	medium
82365	Mandriva Linux Security Advisory : python-lxml (MDVSA-2015:112)	Nessus	Mandriva Local Security Checks	medium
78254	SuSE 11.3 Security Update : python-lxml (SAT Patch Number 9821)	Nessus	SuSE Local Security Checks	medium
75380	openSUSE Security Update : python-lxml (openSUSE-SU-2014:0735-1)	Nessus	SuSE Local Security Checks	medium
74277	Debian DSA-2941-1 : lxml - security update	Nessus	Debian Local Security Checks	medium
74136	Ubuntu 14.04 LTS : lxml vulnerability (USN-2217-1)	Nessus	Ubuntu Local Security Checks	critical
74030	Mandriva Linux Security Advisory : python-lxml (MDVSA-2014:088)	Nessus	Mandriva Local Security Checks	medium

Detections

Analytics

CVE-2014-3146

critical

Tenable Plugins

medium

medium

medium

medium

medium

medium

medium

medium

medium

medium

medium

medium

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critical

medium