GHSA-R48C-7GPG-9Q4X

Vulnerability from github – Published: 2022-05-13 01:09 – Updated: 2025-04-12 13:01
VLAI
Details

The Apache HTTP Server 2.4.18 through 2.4.20, when mod_http2 and mod_ssl are enabled, does not properly recognize the "SSLVerifyClient require" directive for HTTP/2 request authorization, which allows remote attackers to bypass intended access restrictions by leveraging the ability to send multiple requests over a single connection and aborting a renegotiation.

Severity
7.5 (High)
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
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{
  "affected": [],
  "aliases": [
    "CVE-2016-4979"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-284"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2016-07-06T14:59:00Z",
    "severity": "HIGH"
  },
  "details": "The Apache HTTP Server 2.4.18 through 2.4.20, when mod_http2 and mod_ssl are enabled, does not properly recognize the \"SSLVerifyClient require\" directive for HTTP/2 request authorization, which allows remote attackers to bypass intended access restrictions by leveraging the ability to send multiple requests over a single connection and aborting a renegotiation.",
  "id": "GHSA-r48c-7gpg-9q4x",
  "modified": "2025-04-12T13:01:49Z",
  "published": "2022-05-13T01:09:43Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2016-4979"
    },
    {
      "type": "WEB",
      "url": "https://github.com/apache/httpd/commit/2d0e4eff04ea963128a41faaef21f987272e05a2"
    },
    {
      "type": "WEB",
      "url": "https://security.netapp.com/advisory/ntap-20180601-0001"
    },
    {
      "type": "WEB",
      "url": "https://security.gentoo.org/glsa/201610-02"
    },
    {
      "type": "WEB",
      "url": "https://lists.apache.org/thread.html/rf6449464fd8b7437704c55f88361b66f12d5b5f90bcce66af4be4ba9@%3Ccvs.httpd.apache.org%3E"
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    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2016:1420"
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      "url": "http://httpd.apache.org/security/vulnerabilities_24.html"
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    {
      "type": "WEB",
      "url": "http://packetstormsecurity.com/files/137771/Apache-2.4.20-X509-Authentication-Bypass.html"
    },
    {
      "type": "WEB",
      "url": "http://seclists.org/fulldisclosure/2016/Jul/11"
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    {
      "type": "WEB",
      "url": "http://www.apache.org/dist/httpd/CHANGES_2.4"
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    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2016/07/05/5"
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    {
      "type": "WEB",
      "url": "http://www.oracle.com/technetwork/security-advisory/cpuoct2016-2881722.html"
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    {
      "type": "WEB",
      "url": "http://www.oracle.com/technetwork/topics/security/bulletinoct2016-3090566.html"
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    {
      "type": "WEB",
      "url": "http://www.securityfocus.com/bid/91566"
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    {
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      "url": "http://www.securitytracker.com/id/1036225"
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  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
      "type": "CVSS_V3"
    }
  ]
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
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