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.

An update of the python package has been released.

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.

The remote Redhat Enterprise Linux 8 host has one or more packages installed that are affected by a vulnerability that has 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)

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

The remote SUSE Linux SLES12 / SLES_SAP12 host has a package installed that is affected by multiple vulnerabilities as referenced in the SUSE-SU-2022:0895-1 advisory.

  - 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)

  - An XSS vulnerability was discovered in python-lxml's clean module versions before 4.6.3. When disabling     the safe_attrs_only and forms arguments, the Cleaner class does not remove the formaction attribute     allowing for JS to bypass the sanitizer. A remote attacker could exploit this flaw to run arbitrary JS     code on users who interact with incorrectly sanitized HTML. This issue is patched in lxml 4.6.3.
    (CVE-2021-28957)

  - lxml is a library for processing XML and HTML in the Python language. Prior to version 4.6.5, the HTML     Cleaner in lxml.html lets certain crafted script content pass through, as well as script content in SVG     files embedded using data URIs. Users that employ the HTML cleaner in a security relevant context should     upgrade to lxml 4.6.5 to receive a patch. There are no known workarounds available. (CVE-2021-43818)

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

The remote SUSE Linux SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2022:0803-1 advisory.

  - 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)

  - An XSS vulnerability was discovered in python-lxml's clean module versions before 4.6.3. When disabling     the safe_attrs_only and forms arguments, the Cleaner class does not remove the formaction attribute     allowing for JS to bypass the sanitizer. A remote attacker could exploit this flaw to run arbitrary JS     code on users who interact with incorrectly sanitized HTML. This issue is patched in lxml 4.6.3.
    (CVE-2021-28957)

  - lxml is a library for processing XML and HTML in the Python language. Prior to version 4.6.5, the HTML     Cleaner in lxml.html lets certain crafted script content pass through, as well as script content in SVG     files embedded using data URIs. Users that employ the HTML cleaner in a security relevant context should     upgrade to lxml 4.6.5 to receive a patch. There are no known workarounds available. (CVE-2021-43818)

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

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 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)

  - 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 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.

According to the version of the python-lxml packages installed, the EulerOS installation on the remote host is affected by the following vulnerability :

  - 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 version of the python-lxml package installed, the EulerOS installation on the remote host is affected by the following vulnerability :

  - 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.

Update to 4.2.5

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.

The remote Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS host has packages installed that are affected by a vulnerability as referenced in the USN-3841-1 advisory.

    It was discovered that lxml incorrectly handled certain HTML files. An attacker could possibly use this     issue 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.

It was discovered that there was a XSS injection vulnerability in the LXML HTML/XSS manipulation library for Python.

LXML did not remove 'javascript:' URLs that used escaping such as 'j a v a s c r i p t'. This is a similar issue to CVE-2014-3146.

For Debian 8 'Jessie', this issue has been fixed in lxml version 3.4.0-1+deb8u1.

We recommend that you upgrade your lxml 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
203970	Photon OS 3.0: Python PHSA-2022-3.0-0406	Nessus	PhotonOS Local Security Checks	medium
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
199556	RHEL 8 : python-lxml (Unpatched Vulnerability)	Nessus	Red Hat Local Security Checks	medium
159062	SUSE SLES12 Security Update : python-lxml (SUSE-SU-2022:0895-1)	Nessus	SuSE Local Security Checks	high
158799	SUSE SLED15 / SLES15 Security Update : python-lxml (SUSE-SU-2022:0803-1)	Nessus	SuSE Local Security Checks	high
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
147095	EulerOS Virtualization for ARM 64 3.0.6.0 : python-lxml (EulerOS-SA-2021-1538)	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
144170	EulerOS 2.0 SP8 : python-lxml (EulerOS-SA-2020-2529)	Nessus	Huawei Local Security Checks	medium
142071	EulerOS 2.0 SP5 : python-lxml (EulerOS-SA-2020-2296)	Nessus	Huawei Local Security Checks	medium
141751	EulerOS 2.0 SP9 : python-lxml (EulerOS-SA-2020-2235)	Nessus	Huawei Local Security Checks	medium
141740	EulerOS 2.0 SP9 : python-lxml (EulerOS-SA-2020-2236)	Nessus	Huawei Local Security Checks	medium
120488	Fedora 28 : python-lxml (2018-67e98d4b7a)	Nessus	Fedora Local Security Checks	medium
120402	Fedora 29 : python-lxml (2018-4be0428ab2)	Nessus	Fedora Local Security Checks	medium
119580	Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS : lxml vulnerability (USN-3841-1)	Nessus	Ubuntu Local Security Checks	medium
119560	Debian DLA-1604-1 : lxml security update	Nessus	Debian Local Security Checks	medium

Detections

Analytics

CVE-2018-19787

medium

Tenable Plugins

medium

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high

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