ghsa-fwxf-w2h7-9w25
Vulnerability from github
Published
2022-05-13 01:45
Modified
2025-04-20 03:49
Severity ?
5.9 (Medium) - CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Details

OpenSSL 1.0.2 (starting from version 1.0.2b) introduced an "error state" mechanism. The intent was that if a fatal error occurred during a handshake then OpenSSL would move into the error state and would immediately fail if you attempted to continue the handshake. This works as designed for the explicit handshake functions (SSL_do_handshake(), SSL_accept() and SSL_connect()), however due to a bug it does not work correctly if SSL_read() or SSL_write() is called directly. In that scenario, if the handshake fails then a fatal error will be returned in the initial function call. If SSL_read()/SSL_write() is subsequently called by the application for the same SSL object then it will succeed and the data is passed without being decrypted/encrypted directly from the SSL/TLS record layer. In order to exploit this issue an application bug would have to be present that resulted in a call to SSL_read()/SSL_write() being issued after having already received a fatal error. OpenSSL version 1.0.2b-1.0.2m are affected. Fixed in OpenSSL 1.0.2n. OpenSSL 1.1.0 is not affected.

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{
  "affected": [],
  "aliases": [
    "CVE-2017-3737"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-125"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2017-12-07T16:29:00Z",
    "severity": "MODERATE"
  },
  "details": "OpenSSL 1.0.2 (starting from version 1.0.2b) introduced an \"error state\" mechanism. The intent was that if a fatal error occurred during a handshake then OpenSSL would move into the error state and would immediately fail if you attempted to continue the handshake. This works as designed for the explicit handshake functions (SSL_do_handshake(), SSL_accept() and SSL_connect()), however due to a bug it does not work correctly if SSL_read() or SSL_write() is called directly. In that scenario, if the handshake fails then a fatal error will be returned in the initial function call. If SSL_read()/SSL_write() is subsequently called by the application for the same SSL object then it will succeed and the data is passed without being decrypted/encrypted directly from the SSL/TLS record layer. In order to exploit this issue an application bug would have to be present that resulted in a call to SSL_read()/SSL_write() being issued after having already received a fatal error. OpenSSL version 1.0.2b-1.0.2m are affected. Fixed in OpenSSL 1.0.2n. OpenSSL 1.1.0 is not affected.",
  "id": "GHSA-fwxf-w2h7-9w25",
  "modified": "2025-04-20T03:49:36Z",
  "published": "2022-05-13T01:45:50Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2017-3737"
    },
    {
      "type": "WEB",
      "url": "https://github.com/openssl/openssl/commit/898fb884b706aaeb283de4812340bb0bde8476dc"
    },
    {
      "type": "WEB",
      "url": "https://www.tenable.com/security/tns-2017-16"
    },
    {
      "type": "WEB",
      "url": "https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html"
    },
    {
      "type": "WEB",
      "url": "https://www.openssl.org/news/secadv/20171207.txt"
    },
    {
      "type": "WEB",
      "url": "https://www.digitalmunition.me/2017/12/cve-2017-3737-openssl-security-bypass-vulnerability"
    },
    {
      "type": "WEB",
      "url": "https://www.debian.org/security/2017/dsa-4065"
    },
    {
      "type": "WEB",
      "url": "https://security.netapp.com/advisory/ntap-20180419-0002"
    },
    {
      "type": "WEB",
      "url": "https://security.netapp.com/advisory/ntap-20180117-0002"
    },
    {
      "type": "WEB",
      "url": "https://security.netapp.com/advisory/ntap-20171208-0001"
    },
    {
      "type": "WEB",
      "url": "https://security.gentoo.org/glsa/201712-03"
    },
    {
      "type": "WEB",
      "url": "https://security.FreeBSD.org/advisories/FreeBSD-SA-17:12.openssl.asc"
    },
    {
      "type": "WEB",
      "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-179516.pdf"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2018:2187"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2018:2186"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2018:2185"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2018:0998"
    },
    {
      "type": "WEB",
      "url": "http://www.oracle.com/technetwork/security-advisory/cpuapr2018-3678067.html"
    },
    {
      "type": "WEB",
      "url": "http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html"
    },
    {
      "type": "WEB",
      "url": "http://www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.html"
    },
    {
      "type": "WEB",
      "url": "http://www.securityfocus.com/bid/102103"
    },
    {
      "type": "WEB",
      "url": "http://www.securitytracker.com/id/1039978"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ]
}


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