usn-6585-1
Vulnerability from osv_ubuntu
Published
2024-01-15 18:31
Modified
2024-01-15 18:31
Summary
libssh2 vulnerability
Details

Fabian Bäumer, Marcus Brinkmann, Jörg Schwenk discovered that the SSH protocol was vulnerable to a prefix truncation attack. If a remote attacker was able to intercept SSH communications, extension negotiation messages could be truncated, possibly leading to certain algorithms and features being downgraded. This issue is known as the Terrapin attack. This update adds protocol extensions to mitigate this issue.

References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "libssh2-1",
            "binary_version": "1.11.0-2ubuntu0.1"
          },
          {
            "binary_name": "libssh2-1-dbgsym",
            "binary_version": "1.11.0-2ubuntu0.1"
          },
          {
            "binary_name": "libssh2-1-dev",
            "binary_version": "1.11.0-2ubuntu0.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:23.10",
        "name": "libssh2",
        "purl": "pkg:deb/ubuntu/libssh2@1.11.0-2ubuntu0.1?arch=source\u0026distro=mantic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.11.0-2ubuntu0.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.10.0-3",
        "1.11.0-2"
      ]
    }
  ],
  "aliases": [],
  "details": "Fabian B\u00e4umer, Marcus Brinkmann, J\u00f6rg Schwenk discovered that the SSH\nprotocol was vulnerable to a prefix truncation attack. If a remote attacker\nwas able to intercept SSH communications, extension negotiation messages\ncould be truncated, possibly leading to certain algorithms and features\nbeing downgraded. This issue is known as the Terrapin attack. This update\nadds protocol extensions to mitigate this issue.\n",
  "id": "USN-6585-1",
  "modified": "2024-01-15T18:31:03.143488Z",
  "published": "2024-01-15T18:31:03.143488Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-6585-1"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2023-48795"
    }
  ],
  "related": [
    "CVE-2023-48795",
    "UBUNTU-CVE-2023-48795"
  ],
  "schema_version": "1.6.3",
  "summary": "libssh2 vulnerability"
}



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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.