rhsa-2022_1309
Vulnerability from csaf_redhat
Published
2022-04-12 15:54
Modified
2024-11-15 14:46
Summary
Red Hat Security Advisory: expat security update

Notes

Topic
An update for expat is now available for Red Hat Enterprise Linux 6 Extended Lifecycle Support. Red Hat Product Security has rated this update as having a security impact of Important. 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: Malformed 2- and 3-byte UTF-8 sequences can lead to arbitrary code execution (CVE-2022-25235) * expat: Namespace-separator characters in "xmlns[:prefix]" attribute values can lead to arbitrary code execution (CVE-2022-25236) * expat: Integer overflow in storeRawNames() (CVE-2022-25315) 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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  "vulnerabilities": [
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      "cve": "CVE-2022-25235",
      "cwe": {
        "id": "CWE-838",
        "name": "Inappropriate Encoding for Output Context"
      },
      "discovery_date": "2022-02-21T00:00:00+00:00",
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          "text": "2056366"
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        {
          "category": "description",
          "text": "A flaw was found in expat. Passing malformed 2- and 3-byte UTF-8 sequences (for example, from start tag names) to the XML processing application on top of expat can lead to arbitrary code execution. This issue is dependent on how invalid UTF-8 is handled inside the XML processor.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "expat: Malformed 2- and 3-byte UTF-8 sequences can lead to arbitrary code execution",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This flaw affects applications that leverage expat to parse untrusted XML files. Applications that only parse trusted XML files or do not process XML files at all are not affected by this flaw.",
          "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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          "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\n\nAfter installing the updated packages, applications using the Expat library must be restarted for the update to take effect.",
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        {
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      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
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            "baseSeverity": "CRITICAL",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
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      "title": "expat: Malformed 2- and 3-byte UTF-8 sequences can lead to arbitrary code execution"
    },
    {
      "cve": "CVE-2022-25236",
      "cwe": {
        "id": "CWE-179",
        "name": "Incorrect Behavior Order: Early Validation"
      },
      "discovery_date": "2022-02-21T00:00:00+00:00",
      "ids": [
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        }
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        {
          "category": "description",
          "text": "A flaw was found in expat. Passing one or more namespace separator characters in the \"xmlns[:prefix]\" attribute values made expat send malformed tag names to the XML processor on top of expat. This issue causes arbitrary code execution depending on how unexpected cases are handled inside the XML processor.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "expat: Namespace-separator characters in \"xmlns[:prefix]\" attribute values can lead to arbitrary code execution",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This flaw affects applications that leverage expat to parse untrusted XML files. Applications that only parse trusted XML files or do not process XML files at all are not affected by this flaw.\n\nThe xmlrpc-c component as shipped with Red Hat Enterprise Linux 8 is not affected by this issue as the issue could not be reproduced in this version.",
          "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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        },
        {
          "category": "external",
          "summary": "RHBZ#2056370",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2056370"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2022-25236",
          "url": "https://www.cve.org/CVERecord?id=CVE-2022-25236"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2022-25236",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-25236"
        },
        {
          "category": "external",
          "summary": "https://blog.hartwork.org/posts/expat-2-4-5-released/",
          "url": "https://blog.hartwork.org/posts/expat-2-4-5-released/"
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        },
        {
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      "title": "expat: Namespace-separator characters in \"xmlns[:prefix]\" attribute values can lead to arbitrary code execution"
    },
    {
      "cve": "CVE-2022-25315",
      "cwe": {
        "id": "CWE-787",
        "name": "Out-of-bounds Write"
      },
      "discovery_date": "2022-02-21T00:00:00+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
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        }
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      "notes": [
        {
          "category": "description",
          "text": "An integer overflow was found in expat. The issue occurs in storeRawNames() by abusing the m_buffer expansion logic to allow allocations very close to INT_MAX and out-of-bounds heap writes. This flaw can cause a denial of service or potentially arbitrary code execution.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "expat: Integer overflow in storeRawNames()",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This flaw affects applications that leverage expat to parse untrusted XML files. Applications that only parse trusted XML files or do not process XML files at all are not affected by this flaw.",
          "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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        {
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        },
        {
          "category": "external",
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          "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-25315"
        },
        {
          "category": "external",
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            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
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            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
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          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "expat: Integer overflow in storeRawNames()"
    }
  ]
}


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Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.