ubuntu-cve-2020-10756
Vulnerability from osv_ubuntu
Published
2020-07-09 16:15
Modified
2026-04-22 07:39
Summary
Details

An out-of-bounds read vulnerability was found in the SLiRP networking implementation of the QEMU emulator. This flaw occurs in the icmp6_send_echoreply() routine while replying to an ICMP echo request, also known as ping. This flaw allows a malicious guest to leak the contents of the host memory, resulting in possible information disclosure. This flaw affects versions of libslirp before 4.3.1.

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

{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "qemu",
            "binary_version": "1:2.11+dfsg-1ubuntu7.31"
          },
          {
            "binary_name": "qemu-block-extra",
            "binary_version": "1:2.11+dfsg-1ubuntu7.31"
          },
          {
            "binary_name": "qemu-guest-agent",
            "binary_version": "1:2.11+dfsg-1ubuntu7.31"
          },
          {
            "binary_name": "qemu-kvm",
            "binary_version": "1:2.11+dfsg-1ubuntu7.31"
          },
          {
            "binary_name": "qemu-system",
            "binary_version": "1:2.11+dfsg-1ubuntu7.31"
          },
          {
            "binary_name": "qemu-system-arm",
            "binary_version": "1:2.11+dfsg-1ubuntu7.31"
          },
          {
            "binary_name": "qemu-system-common",
            "binary_version": "1:2.11+dfsg-1ubuntu7.31"
          },
          {
            "binary_name": "qemu-system-mips",
            "binary_version": "1:2.11+dfsg-1ubuntu7.31"
          },
          {
            "binary_name": "qemu-system-misc",
            "binary_version": "1:2.11+dfsg-1ubuntu7.31"
          },
          {
            "binary_name": "qemu-system-ppc",
            "binary_version": "1:2.11+dfsg-1ubuntu7.31"
          },
          {
            "binary_name": "qemu-system-s390x",
            "binary_version": "1:2.11+dfsg-1ubuntu7.31"
          },
          {
            "binary_name": "qemu-system-sparc",
            "binary_version": "1:2.11+dfsg-1ubuntu7.31"
          },
          {
            "binary_name": "qemu-system-x86",
            "binary_version": "1:2.11+dfsg-1ubuntu7.31"
          },
          {
            "binary_name": "qemu-user",
            "binary_version": "1:2.11+dfsg-1ubuntu7.31"
          },
          {
            "binary_name": "qemu-user-binfmt",
            "binary_version": "1:2.11+dfsg-1ubuntu7.31"
          },
          {
            "binary_name": "qemu-user-static",
            "binary_version": "1:2.11+dfsg-1ubuntu7.31"
          },
          {
            "binary_name": "qemu-utils",
            "binary_version": "1:2.11+dfsg-1ubuntu7.31"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "qemu",
        "purl": "pkg:deb/ubuntu/qemu@1:2.11+dfsg-1ubuntu7.31?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1:2.11+dfsg-1ubuntu7.31"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "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",
        "1:2.11+dfsg-1ubuntu7.23",
        "1:2.11+dfsg-1ubuntu7.25",
        "1:2.11+dfsg-1ubuntu7.26",
        "1:2.11+dfsg-1ubuntu7.27",
        "1:2.11+dfsg-1ubuntu7.28",
        "1:2.11+dfsg-1ubuntu7.29"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "libslirp0",
            "binary_version": "4.1.0-2ubuntu2.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "libslirp",
        "purl": "pkg:deb/ubuntu/libslirp@4.1.0-2ubuntu2.1?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.1.0-2ubuntu2.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "4.0.0-1",
        "4.0.0-2",
        "4.1.0-1",
        "4.1.0-2",
        "4.1.0-2ubuntu1",
        "4.1.0-2ubuntu2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "slirp4netns",
            "binary_version": "0.4.3-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "slirp4netns",
        "purl": "pkg:deb/ubuntu/slirp4netns@0.4.3-1?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.4.1-1",
        "0.4.3-1"
      ]
    }
  ],
  "aliases": [],
  "details": "An out-of-bounds read vulnerability was found in the SLiRP networking implementation of the QEMU emulator. This flaw occurs in the icmp6_send_echoreply() routine while replying to an ICMP echo request, also known as ping. This flaw allows a malicious guest to leak the contents of the host memory, resulting in possible information disclosure. This flaw affects versions of libslirp before 4.3.1.",
  "id": "UBUNTU-CVE-2020-10756",
  "modified": "2026-04-22T07:39:21Z",
  "published": "2020-07-09T16:15:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2020-10756"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-4437-1"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-4467-1"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2020-10756"
    }
  ],
  "related": [
    "USN-4437-1",
    "USN-4467-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2020-10756"
  ]
}



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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.
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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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