rhsa-2024_1530
Vulnerability from csaf_redhat
Published
2024-03-26 16:49
Modified
2024-11-06 05:21
Summary
Red Hat Security Advisory: expat security update

Notes

Topic
An update for expat is now available for Red Hat Enterprise Linux 9. '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: parsing large tokens can trigger a denial of service (CVE-2023-52425) * expat: XML Entity Expansion (CVE-2024-28757)
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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          "text": "A flaw was found in Expat (libexpat). When parsing a large token that requires multiple buffer fills to complete, Expat has to re-parse the token from start numerous times. This process may trigger excessive resource consumption, leading to a denial of service.",
          "title": "Vulnerability description"
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          "text": "expat: parsing large tokens can trigger a denial of service",
          "title": "Vulnerability summary"
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          "text": "The identified flaw in Expat presents a moderate severity issue due to its potential to facilitate resource exhaustion attacks, particularly in scenarios involving parsing large tokens requiring multiple buffer fills. As Expat repeatedly re-parses such tokens from the beginning, it results in disproportionate resource consumption, leading to a denial-of-service (DoS) condition. While the impact is significant, the exploitation requires specific conditions, such as parsing large tokens, which may not always align with typical usage patterns.",
          "title": "Statement"
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          "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.",
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          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2024-28757"
        },
        {
          "category": "external",
          "summary": "RHBZ#2268766",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2268766"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2024-28757",
          "url": "https://www.cve.org/CVERecord?id=CVE-2024-28757"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2024-28757",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-28757"
        },
        {
          "category": "external",
          "summary": "https://github.com/libexpat/libexpat/issues/839",
          "url": "https://github.com/libexpat/libexpat/issues/839"
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      "release_date": "2024-03-10T00:00:00+00:00",
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      "threats": [
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          "details": "Moderate"
        }
      ],
      "title": "expat: XML Entity Expansion"
    }
  ]
}


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