ubuntu-cve-2021-3770
Vulnerability from osv_ubuntu
Published
2021-09-06 12:15
Modified
2025-09-08 16:46
Summary
Details

vim is vulnerable to Heap-based Buffer Overflow

Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.6 (High)
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
N/A (UNKNOWN)
medium
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "vim",
            "binary_version": "2:8.1.2269-1ubuntu5.3"
          },
          {
            "binary_name": "vim-athena",
            "binary_version": "2:8.1.2269-1ubuntu5.3"
          },
          {
            "binary_name": "vim-common",
            "binary_version": "2:8.1.2269-1ubuntu5.3"
          },
          {
            "binary_name": "vim-gtk",
            "binary_version": "2:8.1.2269-1ubuntu5.3"
          },
          {
            "binary_name": "vim-gtk3",
            "binary_version": "2:8.1.2269-1ubuntu5.3"
          },
          {
            "binary_name": "vim-gui-common",
            "binary_version": "2:8.1.2269-1ubuntu5.3"
          },
          {
            "binary_name": "vim-nox",
            "binary_version": "2:8.1.2269-1ubuntu5.3"
          },
          {
            "binary_name": "vim-runtime",
            "binary_version": "2:8.1.2269-1ubuntu5.3"
          },
          {
            "binary_name": "vim-tiny",
            "binary_version": "2:8.1.2269-1ubuntu5.3"
          },
          {
            "binary_name": "xxd",
            "binary_version": "2:8.1.2269-1ubuntu5.3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "vim",
        "purl": "pkg:deb/ubuntu/vim@2:8.1.2269-1ubuntu5.3?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2:8.1.2269-1ubuntu5.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2:8.1.0875-5ubuntu2",
        "2:8.1.0875-5ubuntu3",
        "2:8.1.0875-5ubuntu4",
        "2:8.1.2269-1ubuntu1",
        "2:8.1.2269-1ubuntu4",
        "2:8.1.2269-1ubuntu5"
      ]
    }
  ],
  "aliases": [],
  "details": "vim is vulnerable to Heap-based Buffer Overflow",
  "id": "UBUNTU-CVE-2021-3770",
  "modified": "2025-09-08T16:46:48Z",
  "published": "2021-09-06T12:15:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-3770"
    },
    {
      "type": "REPORT",
      "url": "https://huntr.dev/bounties/016ad2f2-07c1-4d14-a8ce-6eed10729365/"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/vim/vim/commit/b7081e135a16091c93f6f5f7525a5c58fb7ca9f9"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/vim/vim/commit/2ddb89f8a94425cda1e5491efc80c1ccccb6e08e"
    },
    {
      "type": "REPORT",
      "url": "https://huntr.dev/bounties/016ad2f2-07c1-4d14-a8ce-6eed10729365"
    },
    {
      "type": "REPORT",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/J2CJLY3CF55I2ULG2X4ENXLSXAXYW5J4/"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-5093-1"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2021-3770"
    }
  ],
  "related": [
    "USN-5093-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2021-3770"
  ]
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.