CVE-2021-43818

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.

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.

Impact

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.

Patches

The issue has been resolved in lxml 4.6.5.

Workarounds

None.

References

The issues are tracked under the report IDs GHSL-2021-1037 and GHSL-2021-1038.

XML processing library combining libxml2/libxslt with the ElementTree API.

Security Fix(es):

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)

Python is an interpreted, interactive, object-oriented programming language, which includes modules, classes, exceptions, very high level dynamic data types and dynamic typing. Python supports interfaces to many system calls and libraries, as well as to various windowing systems.

Security Fix(es):

• python-lxml: HTML Cleaner allows crafted and SVG embedded scripts to pass through (CVE-2021-43818)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Additional Changes:

For detailed information on changes in this release, see the Rocky Linux 8.6 Release Notes linked from the References section.

Python is an interpreted, interactive, object-oriented programming language, which includes modules, classes, exceptions, very high level dynamic data types and dynamic typing. Python supports interfaces to many system calls and libraries, as well as to various windowing systems.

The following packages have been upgraded to a later upstream version: python38 (3.8), python38-devel (3.8). (BZ#1997680, BZ#1997860)

Security Fix(es):

• python: urllib: Regular expression DoS in AbstractBasicAuthHandler (CVE-2021-3733)

• python-lxml: HTML Cleaner allows crafted and SVG embedded scripts to pass through (CVE-2021-43818)

• python: urllib.parse does not sanitize URLs containing ASCII newline and tabs (CVE-2022-0391)

• python: urllib: HTTP client possible infinite loop on a 100 Continue response (CVE-2021-3737)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Additional Changes:

For detailed information on changes in this release, see the Rocky Linux 8.6 Release Notes linked from the References section.

Python is an interpreted, interactive, object-oriented programming language that supports modules, classes, exceptions, high-level dynamic data types, and dynamic typing. The python27 packages provide a stable release of Python 2.7 with a number of additional utilities and database connectors for MySQL and PostgreSQL.

Security Fix(es):

• python: urllib: Regular expression DoS in AbstractBasicAuthHandler (CVE-2021-3733)

• python: ftplib should not use the host from the PASV response (CVE-2021-4189)

• python-lxml: HTML Cleaner allows crafted and SVG embedded scripts to pass through (CVE-2021-43818)

• python: urllib.parse does not sanitize URLs containing ASCII newline and tabs (CVE-2022-0391)

• python: urllib: HTTP client possible infinite loop on a 100 Continue response (CVE-2021-3737)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Additional Changes:

For detailed information on changes in this release, see the Rocky Linux 8.6 Release Notes linked from the References section.

lxml is an XML processing library providing access to libxml2 and libxslt libraries using the Python ElementTree API.

Security Fix(es):

• python-lxml: HTML Cleaner allows crafted and SVG embedded scripts to pass through (CVE-2021-43818)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Additional Changes:

For detailed information on changes in this release, see the Rocky Linux 8.6 Release Notes linked from the References section.

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.

Python is an interpreted, interactive, object-oriented programming language, which includes modules, classes, exceptions, very high level dynamic data types and dynamic typing. Python supports interfaces to many system calls and libraries, as well as to various windowing systems.

Security Fix(es):

• python-lxml: HTML Cleaner allows crafted and SVG embedded scripts to pass through (CVE-2021-43818)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Additional Changes:

For detailed information on changes in this release, see the AlmaLinux Release Notes linked from the References section.

Python is an interpreted, interactive, object-oriented programming language, which includes modules, classes, exceptions, very high level dynamic data types and dynamic typing. Python supports interfaces to many system calls and libraries, as well as to various windowing systems.

The following packages have been upgraded to a later upstream version: python38 (3.8), python38-devel (3.8). (BZ#1997680, BZ#1997860)

Security Fix(es):

• python: urllib: Regular expression DoS in AbstractBasicAuthHandler (CVE-2021-3733)

• python-lxml: HTML Cleaner allows crafted and SVG embedded scripts to pass through (CVE-2021-43818)

• python: urllib.parse does not sanitize URLs containing ASCII newline and tabs (CVE-2022-0391)

• python: urllib: HTTP client possible infinite loop on a 100 Continue response (CVE-2021-3737)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Additional Changes:

For detailed information on changes in this release, see the AlmaLinux Release Notes linked from the References section.

Python is an interpreted, interactive, object-oriented programming language that supports modules, classes, exceptions, high-level dynamic data types, and dynamic typing. The python27 packages provide a stable release of Python 2.7 with a number of additional utilities and database connectors for MySQL and PostgreSQL.

Security Fix(es):

• python: urllib: Regular expression DoS in AbstractBasicAuthHandler (CVE-2021-3733)

• python: ftplib should not use the host from the PASV response (CVE-2021-4189)

• python-lxml: HTML Cleaner allows crafted and SVG embedded scripts to pass through (CVE-2021-43818)

• python: urllib.parse does not sanitize URLs containing ASCII newline and tabs (CVE-2022-0391)

• python: urllib: HTTP client possible infinite loop on a 100 Continue response (CVE-2021-3737)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Additional Changes:

For detailed information on changes in this release, see the AlmaLinux Release Notes linked from the References section.

lxml is an XML processing library providing access to libxml2 and libxslt libraries using the Python ElementTree API.

Security Fix(es):

• python-lxml: HTML Cleaner allows crafted and SVG embedded scripts to pass through (CVE-2021-43818)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Additional Changes:

For detailed information on changes in this release, see the AlmaLinux Release Notes linked from the References section.

• CVE-2021-43818: prevent certain crafted script content passing through in HTML Cleaner

• Modify the spec file to include a %check section with the tests, fix a failing test in test_io.py

HTML Cleaner allows crafted and SVG embedded scripts to pass through (CVE-2021-43818)

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).

These are all security issues fixed in the python-lxml-doc-4.6.5-1.1 package on the GA media of openSUSE Tumbleweed.

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.

Rocky Enterprise Software Foundation Satellite is a systems management tool for Linux-based infrastructure. It allows for provisioning, remote management, and monitoring of multiple Linux deployments with a single centralized tool.

Security Fix(es):

• libsolv: Heap-based buffer overflow in testcase_read() in src/testcase.c (CVE-2021-3200)
• satellite: foreman: Authenticate remote code execution through Sendmail configuration (CVE-2021-3584)
• candlepin: Allow unintended SCA certificate to authenticate Candlepin (CVE-2021-4142)
• candlepin: netty: Information disclosure via the local system temporary directory (CVE-2021-21290)
• candlepin: netty: Possible request smuggling in HTTP/2 due missing validation (CVE-2021-21295)
• candlepin: netty: Request smuggling via content-length header (CVE-2021-21409)
• tfm-rubygem-sidekiq: XSS via the queue name of the live-poll feature (CVE-2021-30151)
• python-sqlparse: ReDoS via regular expression in StripComments filter (CVE-2021-32839)
• libsolv: various flaws (CVE-2021-33928 CVE-2021-33929 CVE-2021-33930 CVE-2021-33938)
• tfm-rubygem-puma: Inconsistent Interpretation of HTTP Requests in puma (CVE-2021-41136)
• logback-classic: Remote code execution through JNDI call from within its configuration file (CVE-2021-42550)
• candlepin: netty: Control chars in header names may lead to HTTP request smuggling (CVE-2021-43797)
• python-lxml: HTML Cleaner allows crafted and SVG embedded scripts to pass through (CVE-2021-43818)
• python3-django: Potential bypass of an upstream access control based on URL paths (CVE-2021-44420)
• libsolv: Heap overflow (CVE-2021-44568)
• python3-django: Various flaws (CVE-2021-45115 CVE-2021-45116 CVE-2021-45452 CVE-2022-22818)
• tfm-rubygem-actionpack: Information leak between requests (CVE-2022-23633)
• tfm-rubygem-puma: rubygem-rails: Information leak between requests (CVE-2022-23634)
• python3-django: Denial-of-service possibility in file uploads (CVE-2022-23833)
• tfm-rubygem-sidekiq: WebUI Denial of Service caused by number of days on graph (CVE-2022-23837)
• python3-django: Various flaws (CVE-2022-28346 CVE-2022-28347)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Additional Changes:

• New repo layout for Satellite, Utils, Maintenance, and Client repos.
• Support for Rocky Linux 9 clients
• Module-based installation on Rocky Linux 8
• Upgrading Satellite Server and Capsule Server installations from Rocky Linux 7 to Rocky Linux 8
• Connected and Disconnected servers supported on Rocky Linux 7 and Rocky Linux 8
• Inter-Server Synchronization improvements
• Puppet integration optional and disabled by default
• Pulp 3 updated to Python 3.8
• Change to Capsule certificate archive
• New default port for communication with Rocky Enterprise Software Foundation Subscription Management * (RHSM) API on Capsule servers
• New Content Views Page (Content Publication workflow simplification)
• New Hosts Page (Technology Preview)
• Registration and preview templates
• Simplified host content source changing
• Improved behavior for configuring and running remote jobs
• Provisioning improvements
• New error signaling unsupported options in TASK-Filter
• Virt-who configuration enhanced to support Nutanix AHV
• Cloud Connector configuration updated
• Improved Insights adoption

The items above are not a complete list of changes. This update also fixes several bugs and adds various enhancements. Documentation for these changes is available from the Release Notes document linked to in the References section.

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).

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).

This update for ardana-barbican, grafana, openstack-barbican, openstack-cinder, openstack-heat-gbp, openstack-horizon-plugin-gbp-ui, openstack-ironic, openstack-keystone, openstack-neutron-gbp, python-lxml, release-notes-suse-openstack-cloud fixes the following issues:

Security fixes included on the update:

ardana-barbican:

• Update policies to protect container secret access (SOC-11621)
• Update policies to protect secret metadata access (SOC-11620)

openstack-neutron:

• CVE-2021-40085: Fixed arbitrary dnsmasq reconfiguration via extra_dhcp_opts (bsc#1189794).

rubygem-sinatra:

• CVE-2022-29970: Fixed path traversal possible outside of public_dir when serving static files (bsc#1199138).

python-XStatic-jquery-ui:

• CVE-2021-41182: Fixed XSS in the altField option of the Datepicker widget (bsc#1192070)
• CVE-2021-41183: Fixed XSS in the of option of the .position() util (bsc#1192073)
• CVE-2021-41184: Fixed XSS in *Text options of the Datepicker widget (bsc#1192075)

python-lxml:

• CVE-2018-19787: Fixed that the lxml.html.clean module does remove javascript in lxml/html/clean.py (bsc#1118088).
• CVE-2020-27783: Fixed mXSS due to the use of improper parser (bsc#1179534).
• CVE-2021-28957: Fixed missing input sanitization for formaction HTML5 attributes that may have led to XSS (bsc#1184177).
• CVE-2021-43818: Fixed HTML Cleaner that allowed crafted and SVG embedded scripts to pass through (bsc#1193752).

openstack-barbican:

• CVE-2022-23451: Disallows authenticated users to add/modify/delete arbitrary metadata on any secret (bsc#1194952).
• CVE-2022-23452: Disallows anyone with an admin role to add their secrets to a different project's containers (bsc#1194954).

grafana:

• CVE-2021-44716: Fixed net/http: limit growth of header canonicalization cache (bsc#1193597).

openstack-keystone:

• CVE-2021-38155: Fixed information disclosure during account locking (bsc#1189390).

Non-security fixes included on the update:

Changes in ardana-barbican:

• Update to version 9.0+git.1644879908.8a641c1:

  • Update policies to protect container secret access (SOC-11621)

• Update to version 9.0+git.1643052417.9a3348e:

  • update policies to protect secret metadata access (SOC-11620)

Changes in grafana:

• Add CVE-2021-43813.patch (bsc#1193688, CVE-2021-43813)

  • directory traversal vulnerability for .md files

• Bump Go to 1.16 (bsc#1193597, CVE-2021-44716)

  • Fix Go net/http: limit growth of header canonicalization cache

Changes in openstack-barbican:

• Add patches (0001-Fix-RBAC-and-ACL-access-for-managing-secret-containe.patch and 0001-Fix-policy-for-adding-a-secret-to-a-container.patch) to fix the legacy policy rules for adding a secret to a container and removing a secret from a container. bsc#1194954,CVE-2022-23452

• Add patch (0001-Fix-secret-metadata-access-rules.patch) to fix the legacy policy rules for accessing secret metadata by checking that the user making the request is authenticated for the project that owns the secret. bsc#1194952,CVE-2022-23451

Changes in openstack-cinder:

• Update to version cinder-13.0.10.dev24:
  • Correct group:reset_group_snapshot_status policy

Changes in openstack-cinder:

• Update to version cinder-13.0.10.dev24:
  • Correct group:reset_group_snapshot_status policy

Changes in openstack-heat-gbp:

• Update to version group-based-policy-automation-14.0.1.dev4:

  • Add support for yoga

• Update to version group-based-policy-automation-14.0.1.dev3:

  • Python2/3 compatibility fixes

• Update to version group-based-policy-automation-14.0.1.dev2:

  • Add support for xena

• Update to version group-based-policy-automation-14.0.1.dev1:

  • Remove py27 from gate jobs 14.0.0

Changes in openstack-horizon-plugin-gbp-ui:

• Update to version group-based-policy-ui-14.0.1.dev3:

  • Add support for yoga

• Update to version group-based-policy-ui-14.0.1.dev2:

  • Python2/3 compatibility changes

• Update to version group-based-policy-ui-14.0.1.dev1:

  • Add support for xena …

It was discovered that lxml incorrectly handled certain XML and HTML files. An attacker could possibly use this issue to execute arbitrary code.