ubuntu-cve-2021-3756
Vulnerability from osv_ubuntu
Published
2021-10-29 16:15
Modified
2026-04-22 07:39
Summary
Details

libmysofa is vulnerable to Heap-based Buffer Overflow

Severity
6.2 (Medium)
CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
N/A (UNKNOWN)
medium
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "libmysofa-utils",
            "binary_version": "0.6~dfsg0-3+deb10u1ubuntu0.1~esm1"
          },
          {
            "binary_name": "libmysofa0",
            "binary_version": "0.6~dfsg0-3+deb10u1ubuntu0.1~esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:18.04:LTS",
        "name": "libmysofa",
        "purl": "pkg:deb/ubuntu/libmysofa@0.6~dfsg0-3+deb10u1ubuntu0.1~esm1?arch=source\u0026distro=esm-apps/bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.6~dfsg0-3+deb10u1ubuntu0.1~esm1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.6~dfsg0-1",
        "0.6~dfsg0-2",
        "0.6~dfsg0-2ubuntu0.18.04.1",
        "0.6~dfsg0-3+deb10u1build1"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "libmysofa-utils",
            "binary_version": "1.0~dfsg0-1ubuntu0.1~esm1"
          },
          {
            "binary_name": "libmysofa1",
            "binary_version": "1.0~dfsg0-1ubuntu0.1~esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:20.04:LTS",
        "name": "libmysofa",
        "purl": "pkg:deb/ubuntu/libmysofa@1.0~dfsg0-1ubuntu0.1~esm1?arch=source\u0026distro=esm-apps/focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.0~dfsg0-1ubuntu0.1~esm1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.7~dfsg0-1",
        "0.8~dfsg0-1",
        "0.9~dfsg0-1",
        "0.9.1~dfsg0-1",
        "1.0~dfsg0-1"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "libmysofa-utils",
            "binary_version": "1.2.1~dfsg0-1"
          },
          {
            "binary_name": "libmysofa1",
            "binary_version": "1.2.1~dfsg0-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "libmysofa",
        "purl": "pkg:deb/ubuntu/libmysofa@1.2.1~dfsg0-1?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.2.1~dfsg0-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.2~dfsg0-1"
      ]
    }
  ],
  "aliases": [],
  "details": "libmysofa is vulnerable to Heap-based Buffer Overflow",
  "id": "UBUNTU-CVE-2021-3756",
  "modified": "2026-04-22T07:39:49Z",
  "published": "2021-10-29T16:15:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-3756"
    },
    {
      "type": "REPORT",
      "url": "https://huntr.dev/bounties/7ca8d9ea-e2a6-4294-af28-70260bb53bc1/"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/hoene/libmysofa/commit/890400ebd092c574707d0c132124f8ff047e20e1"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/hoene/libmysofa/commit/890400ebd092c574707d0c132124f8ff047e20e1"
    },
    {
      "type": "REPORT",
      "url": "https://huntr.dev/bounties/7ca8d9ea-e2a6-4294-af28-70260bb53bc1"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-5184-1"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2021-3756"
    }
  ],
  "related": [
    "USN-5184-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2021-3756"
  ]
}



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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.