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USN-7108-2 (UBUNTU-CVE-2023-46445)

Vulnerability from osv_ubuntu – Published: 2024-12-12 06:58 – Updated: 2026-04-27 14:11 – Source website
VLAI
Summary
python-asyncssh vulnerabilities
Details

USN-7108-1 fixed vulnerabilities in AysncSSH. This update provides the corresponding update for Ubuntu 18.04 LTS.

Original advisory details:

Fabian Bäumer, Marcus Brinkmann, and Jörg Schwenk discovered that AsyncSSH did not properly handle the extension info message. An attacker able to intercept communications could possibly use this issue to downgrade the algorithm used for client authentication. (CVE-2023-46445)

Fabian Bäumer, Marcus Brinkmann, and Jörg Schwenk discovered that AsyncSSH did not properly handle the user authentication request message. An attacker could possibly use this issue to control the remote end of an SSH client session via packet injection/removal and shell emulation. (CVE-2023-46446)

References
To clipboard 

{
  "affected": [
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2023-46445",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2023-46446",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:Pro:18.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "python3-asyncssh",
            "binary_version": "1.11.1-1ubuntu0.1~esm2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:18.04:LTS",
        "name": "python-asyncssh",
        "purl": "pkg:deb/ubuntu/python-asyncssh@1.11.1-1ubuntu0.1~esm2?arch=source\u0026distro=esm-apps/bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.11.1-1ubuntu0.1~esm2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.8.1-2",
        "1.11.0-2",
        "1.11.1-1",
        "1.11.1-1ubuntu0.1~esm1"
      ]
    }
  ],
  "aliases": [],
  "details": "USN-7108-1 fixed vulnerabilities in AysncSSH. This update provides the\ncorresponding update for Ubuntu 18.04 LTS.\n\nOriginal advisory details:\n\n Fabian B\u00e4umer, Marcus Brinkmann, and J\u00f6rg Schwenk discovered that AsyncSSH\n did not properly handle the extension info message. An attacker able to\n intercept communications could possibly use this issue to downgrade\n the algorithm used for client authentication. (CVE-2023-46445)\n\n Fabian B\u00e4umer, Marcus Brinkmann, and J\u00f6rg Schwenk discovered that AsyncSSH\n did not properly handle the user authentication request message. An\n attacker could possibly use this issue to control the remote end of an SSH\n client session via packet injection/removal and shell emulation.\n (CVE-2023-46446)\n",
  "id": "USN-7108-2",
  "modified": "2026-04-27T14:11:38Z",
  "published": "2024-12-12T06:58:08Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-7108-2"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2023-46445"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2023-46446"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "python-asyncssh vulnerabilities",
  "upstream": [
    "UBUNTU-CVE-2023-46445",
    "UBUNTU-CVE-2023-46446"
  ]
}



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