Security advisory

{
  "id": "74dcec44657af73096007816f9772cdb35380cffed9f292ce8d89db1f68c7620",
  "url": "https://osv.dev/vulnerability/CVE-2017-7892",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2017-7892",
    "summary": "Sandstorm Cap'n Proto before 0.5.3.1 allows remote crashes related to a compiler optimization. A remote attacker can trigger a segfault in a 32-bit libcapnp application because Cap'n Proto relies on pointer arithmetic calculations that overflow. An example compiler with optimization that elides a bounds check in such calculations is Apple LLVM version 8.1.0 (clang-802.0.41). The attack vector is a crafted far pointer within a message.",
    "evidence": "osv:CVE-2017-7892",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2017-7892",
      "aliases": [
        "CVE-2017-7892"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/capnproto/capnproto",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "133b496e09fdb9937a364a12b69385f2dbcc9cdb"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:capnproto:capnproto:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "0.5.3"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v0.5.3",
            "v0.5.2",
            "v0.5.1.2",
            "v0.5.1.1",
            "v0.5.1",
            "v0.5.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2017-7892.json"
          }
        }
      ],
      "modified": "2026-10-20T10:49:35.556399232Z",
      "provider": "osv",
      "references": [
        "https://github.com/sandstorm-io/capnproto/blob/master/security-advisories/2017-04-17-0-apple-clang-elides-bounds-check.md"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2017-7892",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 380587,
  "published_at": "2017-04-17T21:59:00.403+00:00"
}