usn-5308-1
Vulnerability from osv_ubuntu
Published
2022-03-07 23:47
Modified
2026-06-25 10:46
Summary
libssh2 vulnerabilities
Details

It was discovered that libssh2 mishandled certain input. If libssh2 were used to connect to a malicious or compromised SSH server, a remote, unauthenticated attacker could possibly execute arbitrary code on the client system. (CVE-2019-3855)

It was discovered that libssh2 incorrectly handled prompt requests. A remote attacker could possibly use this issue to execute arbitrary code. (CVE-2019-3856)

It was discovered that libssh2 incorrectly handled SSH_MSG_CHANNEL_REQUEST packets. A remote attacker could possibly use this issue to execute arbitrary code, cause a denial of service, or obtain sensitive information. (CVE-2019-3857, CVE-2019-3862)

It was discovered that libssh2 incorrectly handled specially crafted SFTP packets. A remote attacker could possibly use this issue to cause a denial of service or obtain sensitive information. (CVE-2019-3858)

It was discovered that libssh2 incorrectly handled certain specially crafted packets. A remote attacker could possibly use this issue to cause a denial of service or obtain sensitive information. (CVE-2019-3859)

It was discovered that libssh2 incorrectly handled SFTP packets with empty payloads. A remote attacker could possibly use this issue to cause a denial of service or obtain sensitive information. (CVE-2019-3860)

It was discovered that libssh2 incorrectly handled padding values in SSH packets. A remote attacker could possibly use this issue to cause a denial of service or obtain sensitive information. (CVE-2019-3861)

It was discovered that libssh2 incorrectly handled interactive response messages length. A remote attacker could possibly use this issue to execute arbitrary code. (CVE-2019-3863)

It was discovered that libssh2 incorrectly handled the Diffie Hellman key exchange. A remote attacker could possibly use this issue to cause a denial of service or obtain sensitive information. (CVE-2019-13115)

It was discovered that libssh2 incorrectly handled bound checks in SSH_MSG_DISCONNECT. A remote attacker could possibly use this issue to cause a denial of service or obtain sensitive information. (CVE-2019-17498)

References
To clipboard 

{
  "affected": [
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2019-3855",
              "severity": [
                {
                  "score": "CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2019-3856",
              "severity": [
                {
                  "score": "CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2019-3857",
              "severity": [
                {
                  "score": "CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2019-3858",
              "severity": [
                {
                  "score": "CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2019-3859",
              "severity": [
                {
                  "score": "CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2019-3860",
              "severity": [
                {
                  "score": "CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2019-3861",
              "severity": [
                {
                  "score": "CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2019-3862",
              "severity": [
                {
                  "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2019-3863",
              "severity": [
                {
                  "score": "CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2019-13115",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2019-17498",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:Pro:16.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "libssh2-1",
            "binary_version": "1.5.0-2ubuntu0.1+esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:16.04:LTS",
        "name": "libssh2",
        "purl": "pkg:deb/ubuntu/libssh2@1.5.0-2ubuntu0.1+esm1?arch=source\u0026distro=esm-apps/xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.5.0-2ubuntu0.1+esm1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.5.0-2",
        "1.5.0-2ubuntu0.1"
      ]
    }
  ],
  "aliases": [],
  "details": "It was discovered that libssh2 mishandled certain input. If libssh2 were\nused to connect to a malicious or compromised SSH server, a remote,\nunauthenticated attacker could possibly execute arbitrary code on the client \nsystem. (CVE-2019-3855)\n\nIt was discovered that libssh2 incorrectly handled prompt requests. A\nremote attacker could possibly use this issue to execute arbitrary code.\n(CVE-2019-3856)\n\nIt was discovered that libssh2 incorrectly handled SSH_MSG_CHANNEL_REQUEST\npackets. A remote attacker could possibly use this issue to execute\narbitrary code, cause a denial of service, or obtain sensitive information. \n(CVE-2019-3857, CVE-2019-3862)\n\nIt was discovered that libssh2 incorrectly handled specially crafted SFTP\npackets. A remote attacker could possibly use this issue to cause a denial\nof service or obtain sensitive information. (CVE-2019-3858)\n\nIt was discovered that libssh2 incorrectly handled certain specially\ncrafted packets. A remote attacker could possibly use this issue to cause a\ndenial of service or obtain sensitive information. (CVE-2019-3859)\n\nIt was discovered that libssh2 incorrectly handled SFTP packets with empty\npayloads. A remote attacker could possibly use this issue to cause a denial\nof service or obtain sensitive information. (CVE-2019-3860)\n\nIt was discovered that libssh2 incorrectly handled padding values in SSH\npackets. A remote attacker could possibly use this issue to cause a denial\nof service or obtain sensitive information. (CVE-2019-3861)\n\nIt was discovered that libssh2 incorrectly handled interactive response\nmessages length. A remote attacker could possibly use this issue to execute\narbitrary code. (CVE-2019-3863)\n\nIt was discovered that libssh2 incorrectly handled the Diffie Hellman key\nexchange. A remote attacker could possibly use this issue to cause a denial\nof service or obtain sensitive information. (CVE-2019-13115)\n\nIt was discovered that libssh2 incorrectly handled bound checks in\nSSH_MSG_DISCONNECT. A remote attacker could possibly use this issue to\ncause a denial of service or obtain sensitive information. (CVE-2019-17498)\n",
  "id": "USN-5308-1",
  "modified": "2026-06-25T10:46:04Z",
  "published": "2022-03-07T23:47:01Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-5308-1"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2019-3855"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2019-3856"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2019-3857"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2019-3858"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2019-3859"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2019-3860"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2019-3861"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2019-3862"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2019-3863"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2019-13115"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2019-17498"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "libssh2 vulnerabilities",
  "upstream": [
    "UBUNTU-CVE-2019-3855",
    "UBUNTU-CVE-2019-3856",
    "UBUNTU-CVE-2019-3857",
    "UBUNTU-CVE-2019-3858",
    "UBUNTU-CVE-2019-3859",
    "UBUNTU-CVE-2019-3860",
    "UBUNTU-CVE-2019-3861",
    "UBUNTU-CVE-2019-3862",
    "UBUNTU-CVE-2019-3863",
    "UBUNTU-CVE-2019-13115",
    "UBUNTU-CVE-2019-17498"
  ]
}



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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.


Detection rules are retrieved from Rulezet.