ubuntu-cve-2020-37167
Vulnerability from osv_ubuntu
Published
2026-02-12 23:16
Modified
2026-02-18 16:56
Summary
Details

ClamAV ClamBC bytecode interpreter contains a vulnerability in function name processing that allows attackers to manipulate bytecode function names. Attackers can exploit the weak input validation in function name encoding to potentially execute malicious bytecode or cause unexpected behavior in the ClamAV engine.


{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "clamav",
            "binary_version": "0.103.9+dfsg-0ubuntu0.14.04.1+esm1"
          },
          {
            "binary_name": "clamav-base",
            "binary_version": "0.103.9+dfsg-0ubuntu0.14.04.1+esm1"
          },
          {
            "binary_name": "clamav-daemon",
            "binary_version": "0.103.9+dfsg-0ubuntu0.14.04.1+esm1"
          },
          {
            "binary_name": "clamav-docs",
            "binary_version": "0.103.9+dfsg-0ubuntu0.14.04.1+esm1"
          },
          {
            "binary_name": "clamav-freshclam",
            "binary_version": "0.103.9+dfsg-0ubuntu0.14.04.1+esm1"
          },
          {
            "binary_name": "clamav-milter",
            "binary_version": "0.103.9+dfsg-0ubuntu0.14.04.1+esm1"
          },
          {
            "binary_name": "clamav-testfiles",
            "binary_version": "0.103.9+dfsg-0ubuntu0.14.04.1+esm1"
          },
          {
            "binary_name": "libclamav-dev",
            "binary_version": "0.103.9+dfsg-0ubuntu0.14.04.1+esm1"
          },
          {
            "binary_name": "libclamav9",
            "binary_version": "0.103.9+dfsg-0ubuntu0.14.04.1+esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:14.04:LTS",
        "name": "clamav",
        "purl": "pkg:deb/ubuntu/clamav@0.103.9+dfsg-0ubuntu0.14.04.1+esm1?arch=source\u0026distro=esm-infra-legacy/trusty"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.97.8+dfsg-1ubuntu4",
        "0.97.8+dfsg-1ubuntu5",
        "0.98.1+dfsg-1ubuntu4",
        "0.98.1+dfsg-1ubuntu5",
        "0.98.1+dfsg-2ubuntu2",
        "0.98.1+dfsg-4ubuntu1",
        "0.98.1+dfsg-4ubuntu1.1",
        "0.98.5+addedllvm-0ubuntu0.14.04.1",
        "0.98.6+dfsg-0ubuntu0.14.04.1",
        "0.98.7+dfsg-0ubuntu0.14.04.1",
        "0.99.2+addedllvm-0ubuntu0.14.04.1",
        "0.99.2+addedllvm-0ubuntu0.14.04.2",
        "0.99.3+addedllvm-0ubuntu0.14.04.1",
        "0.99.4+addedllvm-0ubuntu0.14.04.1",
        "0.100.1+dfsg-1ubuntu0.14.04.1",
        "0.100.1+dfsg-1ubuntu0.14.04.2",
        "0.100.1+dfsg-1ubuntu0.14.04.3",
        "0.100.1+dfsg-1ubuntu0.14.04.4",
        "0.100.2+dfsg-1ubuntu0.14.04.1",
        "0.100.2+dfsg-1ubuntu0.14.04.2",
        "0.100.3+dfsg-0ubuntu0.14.04.1",
        "0.100.3+dfsg-0ubuntu0.14.04.1+esm1",
        "0.101.4+dfsg-0ubuntu0.14.04.1+esm1",
        "0.102.1+dfsg-0ubuntu0.14.04.1+esm1",
        "0.102.2+dfsg-0ubuntu0.14.04.1+esm1",
        "0.102.3+dfsg-0ubuntu0.14.04.1+esm1",
        "0.102.4+dfsg-0ubuntu0.14.04.1+esm1",
        "0.103.2+dfsg-0ubuntu0.14.04.1+esm1",
        "0.103.2+dfsg-0ubuntu0.14.04.1+esm2",
        "0.103.5+dfsg-0ubuntu0.14.04.1+esm1",
        "0.103.6+dfsg-0ubuntu0.14.04.1+esm1",
        "0.103.8+dfsg-0ubuntu0.14.04.1+esm1",
        "0.103.9+dfsg-0ubuntu0.14.04.1+esm1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "clamav",
            "binary_version": "0.103.12+dfsg-0ubuntu0.16.04.1+esm1"
          },
          {
            "binary_name": "clamav-base",
            "binary_version": "0.103.12+dfsg-0ubuntu0.16.04.1+esm1"
          },
          {
            "binary_name": "clamav-daemon",
            "binary_version": "0.103.12+dfsg-0ubuntu0.16.04.1+esm1"
          },
          {
            "binary_name": "clamav-docs",
            "binary_version": "0.103.12+dfsg-0ubuntu0.16.04.1+esm1"
          },
          {
            "binary_name": "clamav-freshclam",
            "binary_version": "0.103.12+dfsg-0ubuntu0.16.04.1+esm1"
          },
          {
            "binary_name": "clamav-milter",
            "binary_version": "0.103.12+dfsg-0ubuntu0.16.04.1+esm1"
          },
          {
            "binary_name": "clamav-testfiles",
            "binary_version": "0.103.12+dfsg-0ubuntu0.16.04.1+esm1"
          },
          {
            "binary_name": "clamdscan",
            "binary_version": "0.103.12+dfsg-0ubuntu0.16.04.1+esm1"
          },
          {
            "binary_name": "libclamav-dev",
            "binary_version": "0.103.12+dfsg-0ubuntu0.16.04.1+esm1"
          },
          {
            "binary_name": "libclamav9",
            "binary_version": "0.103.12+dfsg-0ubuntu0.16.04.1+esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:16.04:LTS",
        "name": "clamav",
        "purl": "pkg:deb/ubuntu/clamav@0.103.12+dfsg-0ubuntu0.16.04.1+esm1?arch=source\u0026distro=esm-infra/xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
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        "0.98.7+dfsg-0ubuntu5",
        "0.99+dfsg-1ubuntu1",
        "0.99+dfsg-1ubuntu1.1",
        "0.99+dfsg-1ubuntu1.2",
        "0.99.2+dfsg-0ubuntu0.16.04.1",
        "0.99.2+dfsg-0ubuntu0.16.04.2",
        "0.99.2+dfsg-0ubuntu0.16.04.3",
        "0.99.3+addedllvm-0ubuntu0.16.04.1",
        "0.99.4+addedllvm-0ubuntu0.16.04.1",
        "0.100.1+dfsg-1ubuntu0.16.04.1",
        "0.100.1+dfsg-1ubuntu0.16.04.2",
        "0.100.1+dfsg-1ubuntu0.16.04.3",
        "0.100.2+dfsg-1ubuntu0.16.04.1",
        "0.100.3+dfsg-0ubuntu0.16.04.1",
        "0.101.4+dfsg-0ubuntu0.16.04.1",
        "0.102.1+dfsg-0ubuntu0.16.04.2",
        "0.102.2+dfsg-0ubuntu0.16.04.1",
        "0.102.3+dfsg-0ubuntu0.16.04.1",
        "0.102.4+dfsg-0ubuntu0.16.04.1",
        "0.103.2+dfsg-0ubuntu0.16.04.1",
        "0.103.2+dfsg-0ubuntu0.16.04.1+esm1",
        "0.103.5+dfsg-0ubuntu0.16.04.1+esm1",
        "0.103.6+dfsg-0ubuntu0.16.04.1+esm1",
        "0.103.8+dfsg-0ubuntu0.16.04.1+esm1",
        "0.103.9+dfsg-0ubuntu0.16.04.1+esm1",
        "0.103.12+dfsg-0ubuntu0.16.04.1+esm1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libclamunrar9",
            "binary_version": "0.101.2-1~ubuntu0.16.04.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "libclamunrar",
        "purl": "pkg:deb/ubuntu/libclamunrar@0.101.2-1~ubuntu0.16.04.1?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.98.5-1",
        "0.99-1",
        "0.99-1ubuntu0.1",
        "0.100.1-1~ubuntu0.16.04.1",
        "0.101.2-1~ubuntu0.16.04.1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "clamav",
            "binary_version": "0.103.12+dfsg-0ubuntu0.18.04.1+esm1"
          },
          {
            "binary_name": "clamav-base",
            "binary_version": "0.103.12+dfsg-0ubuntu0.18.04.1+esm1"
          },
          {
            "binary_name": "clamav-daemon",
            "binary_version": "0.103.12+dfsg-0ubuntu0.18.04.1+esm1"
          },
          {
            "binary_name": "clamav-docs",
            "binary_version": "0.103.12+dfsg-0ubuntu0.18.04.1+esm1"
          },
          {
            "binary_name": "clamav-freshclam",
            "binary_version": "0.103.12+dfsg-0ubuntu0.18.04.1+esm1"
          },
          {
            "binary_name": "clamav-milter",
            "binary_version": "0.103.12+dfsg-0ubuntu0.18.04.1+esm1"
          },
          {
            "binary_name": "clamav-testfiles",
            "binary_version": "0.103.12+dfsg-0ubuntu0.18.04.1+esm1"
          },
          {
            "binary_name": "clamdscan",
            "binary_version": "0.103.12+dfsg-0ubuntu0.18.04.1+esm1"
          },
          {
            "binary_name": "libclamav-dev",
            "binary_version": "0.103.12+dfsg-0ubuntu0.18.04.1+esm1"
          },
          {
            "binary_name": "libclamav9",
            "binary_version": "0.103.12+dfsg-0ubuntu0.18.04.1+esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:18.04:LTS",
        "name": "clamav",
        "purl": "pkg:deb/ubuntu/clamav@0.103.12+dfsg-0ubuntu0.18.04.1+esm1?arch=source\u0026distro=esm-infra/bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
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        "0.99.3~beta1+dfsg-2ubuntu1",
        "0.99.3~beta1+dfsg-2ubuntu2",
        "0.99.3+addedllvm-0ubuntu1",
        "0.99.3+addedllvm-0ubuntu2",
        "0.99.4+addedllvm-0ubuntu1",
        "0.100.1+dfsg-1ubuntu0.18.04.1",
        "0.100.1+dfsg-1ubuntu0.18.04.2",
        "0.100.1+dfsg-1ubuntu0.18.04.3",
        "0.100.2+dfsg-1ubuntu0.18.04.1",
        "0.100.3+dfsg-0ubuntu0.18.04.1",
        "0.101.4+dfsg-0ubuntu0.18.04.1",
        "0.102.1+dfsg-0ubuntu0.18.04.2",
        "0.102.2+dfsg-0ubuntu0.18.04.1",
        "0.102.3+dfsg-0ubuntu0.18.04.1",
        "0.102.4+dfsg-0ubuntu0.18.04.1",
        "0.103.2+dfsg-0ubuntu0.18.04.1",
        "0.103.2+dfsg-0ubuntu0.18.04.2",
        "0.103.2+dfsg-0ubuntu0.18.04.3",
        "0.103.5+dfsg-0ubuntu0.18.04.1",
        "0.103.6+dfsg-0ubuntu0.18.04.1",
        "0.103.8+dfsg-0ubuntu0.18.04.1",
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        "0.103.12+dfsg-0ubuntu0.18.04.1+esm1"
      ]
    },
    {
      "ecosystem_specific": {
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          {
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        ]
      },
      "package": {
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        "name": "libclamunrar",
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      },
      "ranges": [
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        "0.100.1-1~ubuntu0.18.04.1",
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    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "clamav",
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          },
          {
            "binary_name": "clamav-base",
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          },
          {
            "binary_name": "clamav-daemon",
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          },
          {
            "binary_name": "clamav-docs",
            "binary_version": "1.4.3+dfsg-0ubuntu0.20.04.1+esm1"
          },
          {
            "binary_name": "clamav-freshclam",
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          },
          {
            "binary_name": "clamav-milter",
            "binary_version": "1.4.3+dfsg-0ubuntu0.20.04.1+esm1"
          },
          {
            "binary_name": "clamav-testfiles",
            "binary_version": "1.4.3+dfsg-0ubuntu0.20.04.1+esm1"
          },
          {
            "binary_name": "clamdscan",
            "binary_version": "1.4.3+dfsg-0ubuntu0.20.04.1+esm1"
          },
          {
            "binary_name": "libclamav-dev",
            "binary_version": "1.4.3+dfsg-0ubuntu0.20.04.1+esm1"
          },
          {
            "binary_name": "libclamav12",
            "binary_version": "1.4.3+dfsg-0ubuntu0.20.04.1+esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:20.04:LTS",
        "name": "clamav",
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      },
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        {
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            }
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        }
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        "0.102.2+dfsg-1ubuntu1",
        "0.102.2+dfsg-2ubuntu1",
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        "0.102.4+dfsg-0ubuntu0.20.04.1",
        "0.103.2+dfsg-0ubuntu0.20.04.1",
        "0.103.2+dfsg-0ubuntu0.20.04.2",
        "0.103.5+dfsg-1~20.04.1",
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        "0.103.8+dfsg-0ubuntu0.20.04.1",
        "0.103.9+dfsg-0ubuntu0.20.04.1",
        "0.103.11+dfsg-0ubuntu0.20.04.1",
        "0.103.12+dfsg-0ubuntu0.20.04.1",
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          {
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            "binary_version": "1.3.1-0ubuntu0.20.04.1+esm1"
          },
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        ]
      },
      "package": {
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        "name": "libclamunrar",
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      },
      "ranges": [
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            }
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      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "clamav",
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          },
          {
            "binary_name": "clamav-base",
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          },
          {
            "binary_name": "clamav-daemon",
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          },
          {
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          },
          {
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          },
          {
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          },
          {
            "binary_name": "clamdscan",
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          },
          {
            "binary_name": "libclamav-dev",
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          },
          {
            "binary_name": "libclamav12",
            "binary_version": "1.4.3+dfsg-0ubuntu0.22.04.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "clamav",
        "purl": "pkg:deb/ubuntu/clamav@1.4.3+dfsg-0ubuntu0.22.04.1?arch=source\u0026distro=jammy"
      },
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        "0.103.8+dfsg-0ubuntu0.22.04.1",
        "0.103.9+dfsg-0ubuntu0.22.04.1",
        "0.103.11+dfsg-0ubuntu0.22.04.1",
        "0.103.12+dfsg-0ubuntu0.22.04.1",
        "1.4.3+dfsg-0ubuntu0.22.04.1"
      ]
    },
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            "binary_name": "libclamunrar",
            "binary_version": "1.3.1-0ubuntu0.22.04.1"
          },
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            "binary_name": "libclamunrar12",
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          }
        ]
      },
      "package": {
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        "name": "libclamunrar",
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      ]
    },
    {
      "ecosystem_specific": {
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            "binary_name": "clamav",
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          },
          {
            "binary_name": "clamav-base",
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          },
          {
            "binary_name": "clamav-docs",
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          },
          {
            "binary_name": "clamav-freshclam",
            "binary_version": "1.4.3+dfsg-0ubuntu0.24.04.1"
          },
          {
            "binary_name": "clamav-milter",
            "binary_version": "1.4.3+dfsg-0ubuntu0.24.04.1"
          },
          {
            "binary_name": "clamav-testfiles",
            "binary_version": "1.4.3+dfsg-0ubuntu0.24.04.1"
          },
          {
            "binary_name": "clamdscan",
            "binary_version": "1.4.3+dfsg-0ubuntu0.24.04.1"
          },
          {
            "binary_name": "libclamav-dev",
            "binary_version": "1.4.3+dfsg-0ubuntu0.24.04.1"
          },
          {
            "binary_name": "libclamav12",
            "binary_version": "1.4.3+dfsg-0ubuntu0.24.04.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "clamav",
        "purl": "pkg:deb/ubuntu/clamav@1.4.3+dfsg-0ubuntu0.24.04.1?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.0.2+dfsg-1ubuntu1",
        "1.0.3+dfsg-2ubuntu1",
        "1.0.4+dfsg-0ubuntu1",
        "1.0.5+dfsg-1ubuntu1",
        "1.0.5+dfsg-1.1ubuntu2",
        "1.0.5+dfsg-1.1ubuntu3",
        "1.0.7+dfsg-0ubuntu0.24.04.1",
        "1.0.8+dfsg-0ubuntu0.24.04.1",
        "1.4.3+dfsg-0ubuntu0.24.04.1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "clamav-testfiles-rar",
            "binary_version": "1.3.1-0ubuntu0.24.04.1"
          },
          {
            "binary_name": "libclamunrar",
            "binary_version": "1.3.1-0ubuntu0.24.04.1"
          },
          {
            "binary_name": "libclamunrar12",
            "binary_version": "1.3.1-0ubuntu0.24.04.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "libclamunrar",
        "purl": "pkg:deb/ubuntu/libclamunrar@1.3.1-0ubuntu0.24.04.1?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.0.0-2",
        "1.0.3-1",
        "1.0.4-0ubuntu1",
        "1.0.4-0ubuntu3",
        "1.0.4-0ubuntu4",
        "1.3.1-0ubuntu0.24.04.1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "clamav",
            "binary_version": "1.4.3+dfsg-0ubuntu2"
          },
          {
            "binary_name": "clamav-base",
            "binary_version": "1.4.3+dfsg-0ubuntu2"
          },
          {
            "binary_name": "clamav-daemon",
            "binary_version": "1.4.3+dfsg-0ubuntu2"
          },
          {
            "binary_name": "clamav-docs",
            "binary_version": "1.4.3+dfsg-0ubuntu2"
          },
          {
            "binary_name": "clamav-freshclam",
            "binary_version": "1.4.3+dfsg-0ubuntu2"
          },
          {
            "binary_name": "clamav-milter",
            "binary_version": "1.4.3+dfsg-0ubuntu2"
          },
          {
            "binary_name": "clamav-testfiles",
            "binary_version": "1.4.3+dfsg-0ubuntu2"
          },
          {
            "binary_name": "clamdscan",
            "binary_version": "1.4.3+dfsg-0ubuntu2"
          },
          {
            "binary_name": "libclamav-dev",
            "binary_version": "1.4.3+dfsg-0ubuntu2"
          },
          {
            "binary_name": "libclamav12",
            "binary_version": "1.4.3+dfsg-0ubuntu2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "clamav",
        "purl": "pkg:deb/ubuntu/clamav@1.4.3+dfsg-0ubuntu2?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.4.2+dfsg-0ubuntu1",
        "1.4.2+dfsg-0ubuntu2",
        "1.4.2+dfsg-1ubuntu1",
        "1.4.3+dfsg-0ubuntu1",
        "1.4.3+dfsg-0ubuntu2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "clamav-testfiles-rar",
            "binary_version": "1.3.1-1build1"
          },
          {
            "binary_name": "libclamunrar",
            "binary_version": "1.3.1-1build1"
          },
          {
            "binary_name": "libclamunrar12",
            "binary_version": "1.3.1-1build1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "libclamunrar",
        "purl": "pkg:deb/ubuntu/libclamunrar@1.3.1-1build1?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.3.1-1",
        "1.3.1-1build1"
      ]
    }
  ],
  "aliases": [],
  "details": "ClamAV ClamBC bytecode interpreter contains a vulnerability in function name processing that allows attackers to manipulate bytecode function names. Attackers can exploit the weak input validation in function name encoding to potentially execute malicious bytecode or cause unexpected behavior in the ClamAV engine.",
  "id": "UBUNTU-CVE-2020-37167",
  "modified": "2026-02-18T16:56:31Z",
  "published": "2026-02-12T23:16:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2020-37167"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2020-37167"
    },
    {
      "type": "REPORT",
      "url": "https://www.exploit-db.com/exploits/47687"
    },
    {
      "type": "REPORT",
      "url": "https://www.vulncheck.com/advisories/clamav-clambc-clambc-executable-regular-expression"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2020-37167"
  ],
  "withdrawn": "2026-03-02T10:46:30Z"
}



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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

Author Source Type Date Other

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.

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Detection rules are retrieved from Rulezet.

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