rhsa-2022_1932
Vulnerability from csaf_redhat
Published
2022-05-10 14:11
Modified
2024-11-15 10:51
Summary
Red Hat Security Advisory: python-lxml security update

Notes

Topic
An update for python-lxml is now available for Red Hat Enterprise Linux 8. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Details
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 Red Hat Enterprise Linux 8.6 Release Notes linked from the References section.
Terms of Use
This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.


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  "vulnerabilities": [
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      "cve": "CVE-2021-43818",
      "cwe": {
        "id": "CWE-79",
        "name": "Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)"
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          "category": "description",
          "text": "There\u0027s a flaw in python-lxml\u0027s HTML Cleaner component, which is responsible for sanitizing HTML and Javascript. An attacker who is able to submit a crafted payload to a web service using python-lxml\u0027s HTML Cleaner may be able to trigger script execution in clients such as web browsers. This can occur because the HTML Cleaner did not remove scripts within SVG images in data URLs such as \u003cimg src=\"\"\u003e. XSS can result in impacts to the integrity and availability of the web page, as well as a potential impact to data confidentiality in some circumstances.",
          "title": "Vulnerability description"
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          "text": "python-lxml: HTML Cleaner allows crafted and SVG embedded scripts to pass through",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This flaw is rated as Moderate because code execution is limited to the web browser scope.\n\nFollowing products ship affected component, however the vulnerability is not exposed in the product code. Therefore, we are reducing their impact to moderate.\n* Red Hat Satellite 6.10\n* Red Hat Update Infrastructure for Cloud Providers 4",
          "title": "Statement"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
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          "url": "https://access.redhat.com/security/cve/CVE-2021-43818"
        },
        {
          "category": "external",
          "summary": "RHBZ#2032569",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2032569"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2021-43818",
          "url": "https://www.cve.org/CVERecord?id=CVE-2021-43818"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2021-43818",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-43818"
        },
        {
          "category": "external",
          "summary": "https://github.com/lxml/lxml/blob/lxml-4.6.5/CHANGES.txt",
          "url": "https://github.com/lxml/lxml/blob/lxml-4.6.5/CHANGES.txt"
        }
      ],
      "release_date": "2021-12-12T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2022-05-10T14:11:49+00:00",
          "details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
          "product_ids": [
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            "AppStream-8.6.0.GA:python3-lxml-debuginfo-0:4.2.3-4.el8.x86_64"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2022:1932"
        },
        {
          "category": "workaround",
          "details": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.",
          "product_ids": [
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          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "LOW",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:H/A:L",
            "version": "3.1"
          },
          "products": [
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          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "python-lxml: HTML Cleaner allows crafted and SVG embedded scripts to pass through"
    }
  ]
}


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