Security advisory

{
  "id": "e934e80c6ed4cd07c73d2d4233ac23c62e08fb20c04199d64e00431fd3dba759",
  "url": "https://osv.dev/vulnerability/CVE-2020-24338",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2020-24338",
    "summary": "An issue was discovered in picoTCP through 1.7.0. The DNS domain name record decompression functionality in pico_dns_decompress_name() in pico_dns_common.c does not validate the compression pointer offset values with respect to the actual data present in a DNS response packet, causing out-of-bounds writes that lead to Denial-of-Service and Remote Code Execution.",
    "evidence": "osv:CVE-2020-24338",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2020-24338",
      "aliases": [
        "CVE-2020-24338"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/tass-belgium/picotcp",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "13c00a067190f5ec62340ed932a2bb833c366d63"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:altran:picotcp:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "1.7.0"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v1.7.0",
            "v1.6.2",
            "v1.6.1",
            "v1.6.0",
            "v1.5.1",
            "v1.5.0",
            "v1.3.0",
            "V1.2.4",
            "v1.2.2",
            "v1.2.1",
            "v1.2",
            "sprint8",
            "sprint7",
            "V1.0",
            "sprint6",
            "sprint5",
            "sprint4",
            "sprint3",
            "sprint2",
            "sprint1",
            "sprint0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-24338.json"
          }
        }
      ],
      "modified": "2026-10-24T10:31:06.914341916Z",
      "provider": "osv",
      "references": [
        "https://us-cert.cisa.gov/ics/advisories/icsa-20-343-01",
        "https://www.kb.cert.org/vuls/id/815128"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2020-24338",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 441086,
  "published_at": "2020-12-11T23:15:13.98+00:00"
}