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Security advisory

Type: advisorySources: OSVCVE: CVE-2016-8860

Tor before 0.2.8.9 and 0.2.9.x before 0.2.9.4-alpha had internal functions that were entitled to expect that buf_t data had NUL termination, but the implementation of or/buffers.c did not ensure that NUL termination was present, which allows remote attackers to cause a denial of service (client, hidden service, relay, or authority crash) via crafted data.

Products
Not specified
Affected versions
Not specified
Fixed versions
Not specified
CVEs
CVE-2016-8860
Confirmed fixed CVEs
Not specified
Updated in this feed
1 Nov 2026, 09:17 UTC · Revision 1

Source evidence

CVE-2016-8860

core-osv · Original source

Published 4 Jan 2017, 20:59 UTC

Tor before 0.2.8.9 and 0.2.9.x before 0.2.9.4-alpha had internal functions that were entitled to expect that buf_t data had NUL termination, but the implementation of or/buffers.c did not ensure that NUL termination was present, which allows remote attackers to cause a denial of service (client, hidden service, relay, or authority crash) via crafted data.

osv:CVE-2016-8860
Complete source record
{
  "id": "b880810a74b2c466af31bbb47ab6372427038339f487bbb429fac6cb1f18873b",
  "url": "https://osv.dev/vulnerability/CVE-2016-8860",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2016-8860",
    "summary": "Tor before 0.2.8.9 and 0.2.9.x before 0.2.9.4-alpha had internal functions that were entitled to expect that buf_t data had NUL termination, but the implementation of or/buffers.c did not ensure that NUL termination was present, which allows remote attackers to cause a denial of service (client, hidden service, relay, or authority crash) via crafted data.",
    "evidence": "osv:CVE-2016-8860",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2016-8860",
      "aliases": [
        "CVE-2016-8860"
      ],
      "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/torproject/tor",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "da84aec55c299d8a43566c846bec761c8321a2e3"
                },
                {
                  "introduced": "8b1ea189610f4a96d1029f7ecc0fa4c321cd71e5"
                },
                {
                  "last_affected": "99041ef343eb66c22765ec7d43bbc61304d18955"
                },
                {
                  "fixed": "3cea86eb2fbb65949673eb4ba8ebb695c87a57ce"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:torproject:tor:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "0.2.8.8"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:torproject:tor:0.2.9.1:alpha:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0.2.9.1-alpha"
                      },
                      {
                        "last_affected": "0.2.9.1-alpha"
                      }
                    ],
                    "source": "CPE_STRING"
                  },
                  {
                    "cpe": "cpe:2.3:a:torproject:tor:0.2.9.2:alpha:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0.2.9.2-alpha"
                      },
                      {
                        "last_affected": "0.2.9.2-alpha"
                      }
                    ],
                    "source": "CPE_STRING"
                  },
                  {
                    "cpe": "cpe:2.3:a:torproject:tor:0.2.9.3:alpha:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0.2.9.3-alpha"
                      },
                      {
                        "last_affected": "0.2.9.3-alpha"
                      }
                    ],
                    "source": "CPE_STRING"
                  },
                  {
                    "range": [
                      {
                        "fixed": "3cea86eb2fbb65949673eb4ba8ebb695c87a57ce"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
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            "vanir_signatures": [
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            "vanir_signatures_modified": "2026-10-24T14:12:01Z"
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        {
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              "repo": "https://gitlab.torproject.org/tpo/core/tor",
              "type": "GIT",
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                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "0.2.8.8"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
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                    "cpe": "cpe:2.3:a:torproject:tor:0.2.9.1:alpha:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0.2.9.1-alpha"
                      },
                      {
                        "last_affected": "0.2.9.1-alpha"
                      }
                    ],
                    "source": "CPE_STRING"
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          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2016-8860.json"
          }
        }
      ],
      "modified": "2026-10-24T14:12:01.464112172Z",
      "provider": "osv",
      "references": [
        "https://blog.torproject.org/blog/tor-0289-released-important-fixes",
        "https://security.gentoo.org/glsa/201612-45",
        "https://trac.torproject.org/projects/tor/ticket/20384",
        "https://github.com/torproject/tor/commit/3cea86eb2fbb65949673eb4ba8ebb695c87a57ce"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:a:torproject:tor:0.2.9.0:alpha:*:*:*:*:*:*"
            ],
            "vendor_product": "torproject:tor",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "0.2.9.0-alpha"
                  },
                  {
                    "last_affected": "0.2.9.0-alpha"
                  },
                  {
                    "introduced": "0.2.9.0-alpha"
                  },
                  {
                    "last_affected": "0.2.9.0-alpha"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          }
        ]
      }
    },
    "related_cves": [
      {
        "value": "CVE-2016-8860",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 443296,
  "published_at": "2017-01-04T20:59:00.34+00:00"
}