{
  "schema_version": "1.5.0",
  "id": "CURL-CVE-2019-3823",
  "aliases": [
    "CVE-2019-3823"
  ],
  "summary": "SMTP end-of-response out-of-bounds read",
  "modified": "2026-05-19T11:21:50.00Z",
  "database_specific": {
    "package": "curl",
    "affects": "both",
    "URL": "https://curl.se/docs/CVE-2019-3823.json",
    "www": "https://curl.se/docs/CVE-2019-3823.html",
    "CWE": {
      "id": "CWE-125",
      "desc": "Out-of-bounds Read"
    },
    "last_affected": "7.63.0",
    "severity": "Low"
  },
  "published": "2019-02-06T08:00:00.00Z",
  "affected": [
    {
      "ranges": [
        {
           "type": "SEMVER",
           "events": [
             {"introduced": "7.34.0"},
             {"fixed": "7.64.0"}
           ]
        },
        {
           "type": "GIT",
           "repo": "https://github.com/curl/curl.git",
           "events": [
             {"introduced": "2766262a68688c1dd8143f9c4be84b46c408b70a"},
             {"fixed": "39df4073e5413fcdbb5a38da0c1ce6f1c0ceb484"}
           ]
        }
      ],
      "versions": [
        "7.63.0", "7.62.0", "7.61.1", "7.61.0", "7.60.0", "7.59.0", "7.58.0", 
        "7.57.0", "7.56.1", "7.56.0", "7.55.1", "7.55.0", "7.54.1", "7.54.0", 
        "7.53.1", "7.53.0", "7.52.1", "7.52.0", "7.51.0", "7.50.3", "7.50.2", 
        "7.50.1", "7.50.0", "7.49.1", "7.49.0", "7.48.0", "7.47.1", "7.47.0", 
        "7.46.0", "7.45.0", "7.44.0", "7.43.0", "7.42.1", "7.42.0", "7.41.0", 
        "7.40.0", "7.39.0", "7.38.0", "7.37.1", "7.37.0", "7.36.0", "7.35.0", 
        "7.34.0"
      ]
    }
  ],
  "credits": [
    {
      "name": "Brian Carpenter (Geeknik Labs)",
      "type": "FINDER"
    },
    {
      "name": "Daniel Gustafsson",
      "type": "REMEDIATION_DEVELOPER"
    }
  ],
  "details": "libcurl contains a heap out-of-bounds read in the code handling the\nend-of-response for SMTP.\n\nIf the buffer passed to `smtp_endofresp()` is not null-terminated and contains\nno character ending the parsed number, and `len` is set to 5, then the\n`strtol()` call reads beyond the allocated buffer. The read content is not\nreturned to the caller."
}