Security update for python-lxml SUSE Patch security@suse.de SUSE Security Team openSUSE-SU-2022:0803-1 Final 1 1 2022-03-10T16:36:12Z current 2022-03-10T16:36:12Z 2022-03-10T16:36:12Z cve-database/bin/generate-cvrf.pl 2017-02-24T01:00:00Z Security update for python-lxml This update for python-lxml fixes the following issues: - CVE-2018-19787: Fixed XSS vulnerability via unescaped URL (bsc#1118088). - CVE-2021-28957: Fixed XSS vulnerability ia HTML5 attributes unescaped (bsc#1184177). - CVE-2021-43818: Fixed XSS vulnerability via script content in SVG images using data URIs (bnc#1193752). - CVE-2020-27783: Fixed mutation XSS with improper parser use (bnc#1179534). The CVRF data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0). openSUSE-SLE-15.3-2022-803,openSUSE-SLE-15.4-2022-803 Copyright SUSE LLC under the Creative Commons License 4.0 with Attribution (CC-BY-4.0) https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/thread/CXPBEANDVGCE6ASRYRQYWM4CLYAJ6TAE/ E-Mail link for openSUSE-SU-2022:0803-1 https://www.suse.com/support/security/rating/ SUSE Security Ratings https://bugzilla.suse.com/1118088 SUSE Bug 1118088 https://bugzilla.suse.com/1179534 SUSE Bug 1179534 https://bugzilla.suse.com/1184177 SUSE Bug 1184177 https://bugzilla.suse.com/1193752 SUSE Bug 1193752 https://www.suse.com/security/cve/CVE-2018-19787/ SUSE CVE CVE-2018-19787 page https://www.suse.com/security/cve/CVE-2020-27783/ SUSE CVE CVE-2020-27783 page https://www.suse.com/security/cve/CVE-2021-28957/ SUSE CVE CVE-2021-28957 page https://www.suse.com/security/cve/CVE-2021-43818/ SUSE CVE CVE-2021-43818 page openSUSE Leap 15.3 python2-lxml-4.7.1-3.7.1 python2-lxml-devel-4.7.1-3.7.1 python3-lxml-4.7.1-3.7.1 python3-lxml-devel-4.7.1-3.7.1 python2-lxml-4.7.1-3.7.1 as a component of openSUSE Leap 15.3 python2-lxml-devel-4.7.1-3.7.1 as a component of openSUSE Leap 15.3 python3-lxml-4.7.1-3.7.1 as a component of openSUSE Leap 15.3 python3-lxml-devel-4.7.1-3.7.1 as a component of openSUSE Leap 15.3 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 openSUSE Leap 15.3:python2-lxml-4.7.1-3.7.1 openSUSE Leap 15.3:python2-lxml-devel-4.7.1-3.7.1 openSUSE Leap 15.3:python3-lxml-4.7.1-3.7.1 openSUSE Leap 15.3:python3-lxml-devel-4.7.1-3.7.1 moderate 4.3 AV:N/AC:M/Au:N/C:N/I:P/A:N To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch". https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/thread/CXPBEANDVGCE6ASRYRQYWM4CLYAJ6TAE/ https://www.suse.com/security/cve/CVE-2018-19787.html CVE-2018-19787 https://bugzilla.suse.com/1118088 SUSE Bug 1118088 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 openSUSE Leap 15.3:python2-lxml-4.7.1-3.7.1 openSUSE Leap 15.3:python2-lxml-devel-4.7.1-3.7.1 openSUSE Leap 15.3:python3-lxml-4.7.1-3.7.1 openSUSE Leap 15.3:python3-lxml-devel-4.7.1-3.7.1 moderate 4.3 AV:N/AC:M/Au:N/C:N/I:P/A:N To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch". https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/thread/CXPBEANDVGCE6ASRYRQYWM4CLYAJ6TAE/ https://www.suse.com/security/cve/CVE-2020-27783.html CVE-2020-27783 https://bugzilla.suse.com/1179534 SUSE Bug 1179534 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 openSUSE Leap 15.3:python2-lxml-4.7.1-3.7.1 openSUSE Leap 15.3:python2-lxml-devel-4.7.1-3.7.1 openSUSE Leap 15.3:python3-lxml-4.7.1-3.7.1 openSUSE Leap 15.3:python3-lxml-devel-4.7.1-3.7.1 moderate 4.3 AV:N/AC:M/Au:N/C:N/I:P/A:N To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch". https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/thread/CXPBEANDVGCE6ASRYRQYWM4CLYAJ6TAE/ https://www.suse.com/security/cve/CVE-2021-28957.html CVE-2021-28957 https://bugzilla.suse.com/1184177 SUSE Bug 1184177 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 openSUSE Leap 15.3:python2-lxml-4.7.1-3.7.1 openSUSE Leap 15.3:python2-lxml-devel-4.7.1-3.7.1 openSUSE Leap 15.3:python3-lxml-4.7.1-3.7.1 openSUSE Leap 15.3:python3-lxml-devel-4.7.1-3.7.1 moderate 6.8 AV:N/AC:M/Au:N/C:P/I:P/A:P To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch". https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/thread/CXPBEANDVGCE6ASRYRQYWM4CLYAJ6TAE/ https://www.suse.com/security/cve/CVE-2021-43818.html CVE-2021-43818 https://bugzilla.suse.com/1193752 SUSE Bug 1193752