RHSA-2023:0103

Vulnerability from csaf_redhat - Published: 2023-01-12 09:28 - Updated: 2025-12-05 05:59
Summary
Red Hat Security Advisory: expat security update

Notes

Topic
An update for expat 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
Expat is a C library for parsing XML documents. Security Fix(es): * expat: use-after free caused by overeager destruction of a shared DTD in XML_ExternalEntityParserCreate (CVE-2022-43680) 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.
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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      "cwe": {
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        "name": "Use After Free"
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      "discovery_date": "2022-11-04T00:00:00+00:00",
      "ids": [
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          "text": "A use-after-free flaw was found in the Expat package, caused by destruction of a shared DTD in XML_ExternalEntityParserCreate in out-of-memory situations. This may lead to availability disruptions.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "expat: use-after free caused by overeager destruction of a shared DTD in XML_ExternalEntityParserCreate",
          "title": "Vulnerability summary"
        },
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          "category": "other",
          "text": "This vulnerability can only happen under special (out-of-memory) conditions, thus it is not possible to exploit on every possible system that has expat installed. Additionally as the flaw is only capable of causing a Denial of Service, Red Hat rates the impact as Moderate.",
          "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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      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "expat: use-after free caused by overeager destruction of a shared DTD in XML_ExternalEntityParserCreate"
    }
  ]
}


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Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.