Security update for python-lxml SUSE Patch security@suse.de SUSE Security Team SUSE-SU-2022:0895-1 Final 1 1 2022-03-17T14:38:22Z current 2022-03-17T14:38:22Z 2022-03-17T14:38:22Z 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-2021-43818: Removed SVG image data URLs since they can embed script content (bsc#1193752). - CVE-2021-28957: Fixed a potential XSS due to improper input sanitization (bsc#1184177). - CVE-2020-27783: Fixed a potential XSS due to improper HTML parsing (bsc#1179534). - CVE-2018-19787: Fixed a potential XSS due to improper input sanitization (bsc#1118088). The CVRF data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0). HPE-Helion-OpenStack-8-2022-895,Image SLES12-SP4-SAP-Azure-LI-BYOS-Production-2022-895,Image SLES12-SP4-SAP-Azure-VLI-BYOS-Production-2022-895,Image SLES12-SP5-SAP-Azure-LI-BYOS-Production-2022-895,Image SLES12-SP5-SAP-Azure-VLI-BYOS-Production-2022-895,SUSE-2022-895,SUSE-OpenStack-Cloud-8-2022-895,SUSE-OpenStack-Cloud-Crowbar-8-2022-895,SUSE-SLE-SERVER-12-SP5-2022-895 Copyright SUSE LLC under the Creative Commons License 4.0 with Attribution (CC-BY-4.0) https://www.suse.com/support/update/announcement/2022/suse-su-20220895-1/ Link for SUSE-SU-2022:0895-1 https://lists.suse.com/pipermail/sle-security-updates/2022-March/010467.html E-Mail link for SUSE-SU-2022:0895-1 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 HPE Helion OpenStack 8 Image SLES12-SP4-SAP-Azure-LI-BYOS-Production Image SLES12-SP4-SAP-Azure-VLI-BYOS-Production Image SLES12-SP5-SAP-Azure-LI-BYOS-Production Image SLES12-SP5-SAP-Azure-VLI-BYOS-Production SUSE Linux Enterprise Server 12 SP5 SUSE Linux Enterprise Server for SAP Applications 12 SP5 SUSE OpenStack Cloud 8 SUSE OpenStack Cloud Crowbar 8 python-lxml-3.6.1-8.5.1 python-lxml-devel-3.6.1-8.5.1 python-lxml-doc-3.6.1-8.5.1 python-lxml-3.6.1-8.5.1 as a component of HPE Helion OpenStack 8 python-lxml-3.6.1-8.5.1 as a component of Image SLES12-SP4-SAP-Azure-LI-BYOS-Production python-lxml-3.6.1-8.5.1 as a component of Image SLES12-SP4-SAP-Azure-VLI-BYOS-Production python-lxml-3.6.1-8.5.1 as a component of Image SLES12-SP5-SAP-Azure-LI-BYOS-Production python-lxml-3.6.1-8.5.1 as a component of Image SLES12-SP5-SAP-Azure-VLI-BYOS-Production python-lxml-3.6.1-8.5.1 as a component of SUSE Linux Enterprise Server 12 SP5 python-lxml-3.6.1-8.5.1 as a component of SUSE Linux Enterprise Server for SAP Applications 12 SP5 python-lxml-3.6.1-8.5.1 as a component of SUSE OpenStack Cloud 8 python-lxml-3.6.1-8.5.1 as a component of SUSE OpenStack Cloud Crowbar 8 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 HPE Helion OpenStack 8:python-lxml-3.6.1-8.5.1 Image SLES12-SP4-SAP-Azure-LI-BYOS-Production:python-lxml-3.6.1-8.5.1 Image SLES12-SP4-SAP-Azure-VLI-BYOS-Production:python-lxml-3.6.1-8.5.1 Image SLES12-SP5-SAP-Azure-LI-BYOS-Production:python-lxml-3.6.1-8.5.1 Image SLES12-SP5-SAP-Azure-VLI-BYOS-Production:python-lxml-3.6.1-8.5.1 SUSE Linux Enterprise Server 12 SP5:python-lxml-3.6.1-8.5.1 SUSE Linux Enterprise Server for SAP Applications 12 SP5:python-lxml-3.6.1-8.5.1 SUSE OpenStack Cloud 8:python-lxml-3.6.1-8.5.1 SUSE OpenStack Cloud Crowbar 8:python-lxml-3.6.1-8.5.1 moderate To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch". https://www.suse.com/support/update/announcement/2022/suse-su-20220895-1/ 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 HPE Helion OpenStack 8:python-lxml-3.6.1-8.5.1 Image SLES12-SP4-SAP-Azure-LI-BYOS-Production:python-lxml-3.6.1-8.5.1 Image SLES12-SP4-SAP-Azure-VLI-BYOS-Production:python-lxml-3.6.1-8.5.1 Image SLES12-SP5-SAP-Azure-LI-BYOS-Production:python-lxml-3.6.1-8.5.1 Image SLES12-SP5-SAP-Azure-VLI-BYOS-Production:python-lxml-3.6.1-8.5.1 SUSE Linux Enterprise Server 12 SP5:python-lxml-3.6.1-8.5.1 SUSE Linux Enterprise Server for SAP Applications 12 SP5:python-lxml-3.6.1-8.5.1 SUSE OpenStack Cloud 8:python-lxml-3.6.1-8.5.1 SUSE OpenStack Cloud Crowbar 8:python-lxml-3.6.1-8.5.1 moderate To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch". https://www.suse.com/support/update/announcement/2022/suse-su-20220895-1/ 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 HPE Helion OpenStack 8:python-lxml-3.6.1-8.5.1 Image SLES12-SP4-SAP-Azure-LI-BYOS-Production:python-lxml-3.6.1-8.5.1 Image SLES12-SP4-SAP-Azure-VLI-BYOS-Production:python-lxml-3.6.1-8.5.1 Image SLES12-SP5-SAP-Azure-LI-BYOS-Production:python-lxml-3.6.1-8.5.1 Image SLES12-SP5-SAP-Azure-VLI-BYOS-Production:python-lxml-3.6.1-8.5.1 SUSE Linux Enterprise Server 12 SP5:python-lxml-3.6.1-8.5.1 SUSE Linux Enterprise Server for SAP Applications 12 SP5:python-lxml-3.6.1-8.5.1 SUSE OpenStack Cloud 8:python-lxml-3.6.1-8.5.1 SUSE OpenStack Cloud Crowbar 8:python-lxml-3.6.1-8.5.1 moderate To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch". https://www.suse.com/support/update/announcement/2022/suse-su-20220895-1/ 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 HPE Helion OpenStack 8:python-lxml-3.6.1-8.5.1 Image SLES12-SP4-SAP-Azure-LI-BYOS-Production:python-lxml-3.6.1-8.5.1 Image SLES12-SP4-SAP-Azure-VLI-BYOS-Production:python-lxml-3.6.1-8.5.1 Image SLES12-SP5-SAP-Azure-LI-BYOS-Production:python-lxml-3.6.1-8.5.1 Image SLES12-SP5-SAP-Azure-VLI-BYOS-Production:python-lxml-3.6.1-8.5.1 SUSE Linux Enterprise Server 12 SP5:python-lxml-3.6.1-8.5.1 SUSE Linux Enterprise Server for SAP Applications 12 SP5:python-lxml-3.6.1-8.5.1 SUSE OpenStack Cloud 8:python-lxml-3.6.1-8.5.1 SUSE OpenStack Cloud Crowbar 8:python-lxml-3.6.1-8.5.1 moderate To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch". https://www.suse.com/support/update/announcement/2022/suse-su-20220895-1/ https://www.suse.com/security/cve/CVE-2021-43818.html CVE-2021-43818 https://bugzilla.suse.com/1193752 SUSE Bug 1193752