ubuntu-cve-2020-7039
Vulnerability from osv_ubuntu
Published
2020-01-16 23:15
Modified
2025-09-08 16:45
Summary
Details

tcp_emu in tcp_subr.c in libslirp 4.1.0, as used in QEMU 4.2.0, mismanages memory, as demonstrated by IRC DCC commands in EMU_IRC. This can cause a heap-based buffer overflow or other out-of-bounds access which can lead to a DoS or potential execute arbitrary code.

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

{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "qemu",
            "binary_version": "2.0.0+dfsg-2ubuntu1.47+esm4"
          },
          {
            "binary_name": "qemu-common",
            "binary_version": "2.0.0+dfsg-2ubuntu1.47+esm4"
          },
          {
            "binary_name": "qemu-guest-agent",
            "binary_version": "2.0.0+dfsg-2ubuntu1.47+esm4"
          },
          {
            "binary_name": "qemu-keymaps",
            "binary_version": "2.0.0+dfsg-2ubuntu1.47+esm4"
          },
          {
            "binary_name": "qemu-kvm",
            "binary_version": "2.0.0+dfsg-2ubuntu1.47+esm4"
          },
          {
            "binary_name": "qemu-system",
            "binary_version": "2.0.0+dfsg-2ubuntu1.47+esm4"
          },
          {
            "binary_name": "qemu-system-aarch64",
            "binary_version": "2.0.0+dfsg-2ubuntu1.47+esm4"
          },
          {
            "binary_name": "qemu-system-arm",
            "binary_version": "2.0.0+dfsg-2ubuntu1.47+esm4"
          },
          {
            "binary_name": "qemu-system-common",
            "binary_version": "2.0.0+dfsg-2ubuntu1.47+esm4"
          },
          {
            "binary_name": "qemu-system-mips",
            "binary_version": "2.0.0+dfsg-2ubuntu1.47+esm4"
          },
          {
            "binary_name": "qemu-system-misc",
            "binary_version": "2.0.0+dfsg-2ubuntu1.47+esm4"
          },
          {
            "binary_name": "qemu-system-ppc",
            "binary_version": "2.0.0+dfsg-2ubuntu1.47+esm4"
          },
          {
            "binary_name": "qemu-system-sparc",
            "binary_version": "2.0.0+dfsg-2ubuntu1.47+esm4"
          },
          {
            "binary_name": "qemu-system-x86",
            "binary_version": "2.0.0+dfsg-2ubuntu1.47+esm4"
          },
          {
            "binary_name": "qemu-user",
            "binary_version": "2.0.0+dfsg-2ubuntu1.47+esm4"
          },
          {
            "binary_name": "qemu-user-static",
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          },
          {
            "binary_name": "qemu-utils",
            "binary_version": "2.0.0+dfsg-2ubuntu1.47+esm4"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:14.04:LTS",
        "name": "qemu",
        "purl": "pkg:deb/ubuntu/qemu@2.0.0+dfsg-2ubuntu1.47+esm4?arch=source\u0026distro=trusty/esm"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.0.0+dfsg-2ubuntu1.47+esm4"
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          ],
          "type": "ECOSYSTEM"
        }
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      "versions": [
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        "1.5.0+dfsg-3ubuntu6",
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        "1.6.0+dfsg-2ubuntu3",
        "1.6.0+dfsg-2ubuntu4",
        "1.7.0+dfsg-2ubuntu1",
        "1.7.0+dfsg-2ubuntu2",
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        "1.7.0+dfsg-3ubuntu5",
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        "2.0.0~rc1+dfsg-0ubuntu2",
        "2.0.0~rc1+dfsg-0ubuntu3",
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        "2.0.0+dfsg-2ubuntu1",
        "2.0.0+dfsg-2ubuntu1.1",
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        "2.0.0+dfsg-2ubuntu1.7",
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        "2.0.0+dfsg-2ubuntu1.35",
        "2.0.0+dfsg-2ubuntu1.36",
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        "2.0.0+dfsg-2ubuntu1.47+esm1",
        "2.0.0+dfsg-2ubuntu1.47+esm2",
        "2.0.0+dfsg-2ubuntu1.47+esm3"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "slirp",
            "binary_version": "1:1.0.17-7+deb8u2build0.14.04.1+esm1"
          }
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      },
      "package": {
        "ecosystem": "Ubuntu:Pro:14.04:LTS",
        "name": "slirp",
        "purl": "pkg:deb/ubuntu/slirp@1:1.0.17-7+deb8u2build0.14.04.1+esm1?arch=source\u0026distro=trusty/esm"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1:1.0.17-7+deb8u2build0.14.04.1+esm1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1:1.0.17-7"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "qemu",
            "binary_version": "1:2.5+dfsg-5ubuntu10.43"
          },
          {
            "binary_name": "qemu-block-extra",
            "binary_version": "1:2.5+dfsg-5ubuntu10.43"
          },
          {
            "binary_name": "qemu-guest-agent",
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          },
          {
            "binary_name": "qemu-kvm",
            "binary_version": "1:2.5+dfsg-5ubuntu10.43"
          },
          {
            "binary_name": "qemu-system",
            "binary_version": "1:2.5+dfsg-5ubuntu10.43"
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          {
            "binary_name": "qemu-system-aarch64",
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          {
            "binary_name": "qemu-system-arm",
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          {
            "binary_name": "qemu-system-common",
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          {
            "binary_name": "qemu-system-mips",
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          },
          {
            "binary_name": "qemu-system-misc",
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          {
            "binary_name": "qemu-system-ppc",
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          },
          {
            "binary_name": "qemu-system-s390x",
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          {
            "binary_name": "qemu-system-sparc",
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          {
            "binary_name": "qemu-system-x86",
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          },
          {
            "binary_name": "qemu-user",
            "binary_version": "1:2.5+dfsg-5ubuntu10.43"
          },
          {
            "binary_name": "qemu-user-binfmt",
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          },
          {
            "binary_name": "qemu-user-static",
            "binary_version": "1:2.5+dfsg-5ubuntu10.43"
          },
          {
            "binary_name": "qemu-utils",
            "binary_version": "1:2.5+dfsg-5ubuntu10.43"
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        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "qemu",
        "purl": "pkg:deb/ubuntu/qemu@1:2.5+dfsg-5ubuntu10.43?arch=source\u0026distro=xenial"
      },
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        {
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        "1:2.3+dfsg-5ubuntu10",
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        "1:2.5+dfsg-5ubuntu10.38",
        "1:2.5+dfsg-5ubuntu10.39",
        "1:2.5+dfsg-5ubuntu10.40",
        "1:2.5+dfsg-5ubuntu10.41",
        "1:2.5+dfsg-5ubuntu10.42"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "slirp",
            "binary_version": "1:1.0.17-8ubuntu16.04.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "slirp",
        "purl": "pkg:deb/ubuntu/slirp@1:1.0.17-8ubuntu16.04.1?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1:1.0.17-8ubuntu16.04.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1:1.0.17-8"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "qemu",
            "binary_version": "1:2.11+dfsg-1ubuntu7.23"
          },
          {
            "binary_name": "qemu-block-extra",
            "binary_version": "1:2.11+dfsg-1ubuntu7.23"
          },
          {
            "binary_name": "qemu-guest-agent",
            "binary_version": "1:2.11+dfsg-1ubuntu7.23"
          },
          {
            "binary_name": "qemu-kvm",
            "binary_version": "1:2.11+dfsg-1ubuntu7.23"
          },
          {
            "binary_name": "qemu-system",
            "binary_version": "1:2.11+dfsg-1ubuntu7.23"
          },
          {
            "binary_name": "qemu-system-arm",
            "binary_version": "1:2.11+dfsg-1ubuntu7.23"
          },
          {
            "binary_name": "qemu-system-common",
            "binary_version": "1:2.11+dfsg-1ubuntu7.23"
          },
          {
            "binary_name": "qemu-system-mips",
            "binary_version": "1:2.11+dfsg-1ubuntu7.23"
          },
          {
            "binary_name": "qemu-system-misc",
            "binary_version": "1:2.11+dfsg-1ubuntu7.23"
          },
          {
            "binary_name": "qemu-system-ppc",
            "binary_version": "1:2.11+dfsg-1ubuntu7.23"
          },
          {
            "binary_name": "qemu-system-s390x",
            "binary_version": "1:2.11+dfsg-1ubuntu7.23"
          },
          {
            "binary_name": "qemu-system-sparc",
            "binary_version": "1:2.11+dfsg-1ubuntu7.23"
          },
          {
            "binary_name": "qemu-system-x86",
            "binary_version": "1:2.11+dfsg-1ubuntu7.23"
          },
          {
            "binary_name": "qemu-user",
            "binary_version": "1:2.11+dfsg-1ubuntu7.23"
          },
          {
            "binary_name": "qemu-user-binfmt",
            "binary_version": "1:2.11+dfsg-1ubuntu7.23"
          },
          {
            "binary_name": "qemu-user-static",
            "binary_version": "1:2.11+dfsg-1ubuntu7.23"
          },
          {
            "binary_name": "qemu-utils",
            "binary_version": "1:2.11+dfsg-1ubuntu7.23"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "qemu",
        "purl": "pkg:deb/ubuntu/qemu@1:2.11+dfsg-1ubuntu7.23?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
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            {
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          "type": "ECOSYSTEM"
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      ],
      "versions": [
        "1:2.10+dfsg-0ubuntu3",
        "1:2.10+dfsg-0ubuntu4",
        "1:2.10+dfsg-0ubuntu5",
        "1:2.11+dfsg-1ubuntu1",
        "1:2.11+dfsg-1ubuntu2",
        "1:2.11+dfsg-1ubuntu4",
        "1:2.11+dfsg-1ubuntu5",
        "1:2.11+dfsg-1ubuntu6",
        "1:2.11+dfsg-1ubuntu7",
        "1:2.11+dfsg-1ubuntu7.1",
        "1:2.11+dfsg-1ubuntu7.2",
        "1:2.11+dfsg-1ubuntu7.3",
        "1:2.11+dfsg-1ubuntu7.4",
        "1:2.11+dfsg-1ubuntu7.5",
        "1:2.11+dfsg-1ubuntu7.6",
        "1:2.11+dfsg-1ubuntu7.7",
        "1:2.11+dfsg-1ubuntu7.8",
        "1:2.11+dfsg-1ubuntu7.9",
        "1:2.11+dfsg-1ubuntu7.10",
        "1:2.11+dfsg-1ubuntu7.12",
        "1:2.11+dfsg-1ubuntu7.13",
        "1:2.11+dfsg-1ubuntu7.14",
        "1:2.11+dfsg-1ubuntu7.15",
        "1:2.11+dfsg-1ubuntu7.17",
        "1:2.11+dfsg-1ubuntu7.18",
        "1:2.11+dfsg-1ubuntu7.19",
        "1:2.11+dfsg-1ubuntu7.20",
        "1:2.11+dfsg-1ubuntu7.21",
        "1:2.11+dfsg-1ubuntu7.22"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "slirp",
            "binary_version": "1:1.0.17-8ubuntu18.04.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "slirp",
        "purl": "pkg:deb/ubuntu/slirp@1:1.0.17-8ubuntu18.04.1?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1:1.0.17-8ubuntu18.04.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1:1.0.17-8",
        "1:1.0.17-8build1"
      ]
    }
  ],
  "aliases": [],
  "details": "tcp_emu in tcp_subr.c in libslirp 4.1.0, as used in QEMU 4.2.0, mismanages memory, as demonstrated by IRC DCC commands in EMU_IRC. This can cause a heap-based buffer overflow or other out-of-bounds access which can lead to a DoS or potential execute arbitrary code.",
  "id": "UBUNTU-CVE-2020-7039",
  "modified": "2025-09-08T16:45:58Z",
  "published": "2020-01-16T23:15:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2020-7039"
    },
    {
      "type": "REPORT",
      "url": "https://www.openwall.com/lists/oss-security/2020/01/16/2"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-4283-1"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-4632-1"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2020-7039"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-7094-1"
    }
  ],
  "related": [
    "USN-4283-1",
    "USN-4632-1",
    "USN-7094-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2020-7039"
  ]
}



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Tags
Taxonomy of the tags.





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.


Detection rules are retrieved from Rulezet.