ubuntu-cve-2021-34550
Vulnerability from osv_ubuntu
Published
2021-06-29 12:15
Modified
2025-09-08 16:47
Summary
Details

An issue was discovered in Tor before 0.4.6.5, aka TROVE-2021-006. The v3 onion service descriptor parsing allows out-of-bounds memory access, and a client crash, via a crafted onion service descriptor

Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
N/A (UNKNOWN)
medium
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "tor",
            "binary_version": "0.3.2.10-1ubuntu0.2~esm2"
          },
          {
            "binary_name": "tor-geoipdb",
            "binary_version": "0.3.2.10-1ubuntu0.2~esm2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:18.04:LTS",
        "name": "tor",
        "purl": "pkg:deb/ubuntu/tor@0.3.2.10-1ubuntu0.2~esm2?arch=source\u0026distro=esm-apps/bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.3.2.10-1ubuntu0.2~esm2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.3.0.10-1",
        "0.3.1.8-2",
        "0.3.1.9-1",
        "0.3.2.9-1",
        "0.3.2.9-1build1",
        "0.3.2.10-1",
        "0.3.2.10-1ubuntu0.1",
        "0.3.2.10-1ubuntu0.2~esm1"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "tor",
            "binary_version": "0.4.2.7-1ubuntu0.1~esm1"
          },
          {
            "binary_name": "tor-geoipdb",
            "binary_version": "0.4.2.7-1ubuntu0.1~esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:20.04:LTS",
        "name": "tor",
        "purl": "pkg:deb/ubuntu/tor@0.4.2.7-1ubuntu0.1~esm1?arch=source\u0026distro=esm-apps/focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.4.2.7-1ubuntu0.1~esm1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.4.1.5-1",
        "0.4.1.5-1build1",
        "0.4.1.6-1",
        "0.4.2.5-1",
        "0.4.2.6-1",
        "0.4.2.7-1"
      ]
    }
  ],
  "aliases": [],
  "details": "An issue was discovered in Tor before 0.4.6.5, aka TROVE-2021-006. The v3 onion service descriptor parsing allows out-of-bounds memory access, and a client crash, via a crafted onion service descriptor",
  "id": "UBUNTU-CVE-2021-34550",
  "modified": "2025-09-08T16:47:13Z",
  "published": "2021-06-29T12:15:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-34550"
    },
    {
      "type": "REPORT",
      "url": "https://blog.torproject.org/node/2041"
    },
    {
      "type": "REPORT",
      "url": "https://gitlab.torproject.org/tpo/core/tor/-/commit/f57b5c48e0aa01acd84a194fe4657a0d1cee04cf"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-5036-1"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2021-34550"
    }
  ],
  "related": [
    "USN-5036-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2021-34550"
  ]
}



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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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