rhsa-2021_2258
Vulnerability from csaf_redhat
Published
2021-06-07 07:37
Modified
2024-11-15 11:49
Summary
Red Hat Security Advisory: rh-nginx118-nginx security update

Notes

Topic
An update for rh-nginx118-nginx is now available for Red Hat Software Collections. 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
nginx is a web and proxy server supporting HTTP and other protocols, with a focus on high concurrency, performance, and low memory usage. Security Fix(es): * nginx: Off-by-one in ngx_resolver_copy() when labels are followed by a pointer to a root domain name (CVE-2021-23017) 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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        "name": "Off-by-one Error"
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          "text": "A flaw was found in nginx. An off-by-one error while processing DNS responses allows a network attacker to write a dot character out of bounds in a heap allocated buffer which can allow overwriting the least significant byte of next heap chunk metadata likely leading to a remote code execution in certain circumstances. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.",
          "title": "Vulnerability description"
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          "text": "nginx: Off-by-one in ngx_resolver_copy() when labels are followed by a pointer to a root domain name",
          "title": "Vulnerability summary"
        },
        {
          "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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      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2021-23017"
        },
        {
          "category": "external",
          "summary": "RHBZ#1963121",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1963121"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2021-23017",
          "url": "https://www.cve.org/CVERecord?id=CVE-2021-23017"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2021-23017",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-23017"
        }
      ],
      "release_date": "2021-05-25T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2021-06-07T07:37:12+00:00",
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          "restart_required": {
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          "url": "https://access.redhat.com/errata/RHSA-2021:2258"
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            "availabilityImpact": "HIGH",
            "baseScore": 8.1,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
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      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "nginx: Off-by-one in ngx_resolver_copy() when labels are followed by a pointer to a root domain name"
    }
  ]
}


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