usn-4762-1
Vulnerability from osv_ubuntu
Published
2021-03-10 14:30
Modified
2026-02-10 04:42
Summary
openssh vulnerability
Details

It was discovered that the OpenSSH ssh-agent incorrectly handled memory. A remote attacker able to connect to the agent could use this issue to cause it to crash, resulting in a denial of service, or possibly execute arbitrary code.

References
To clipboard 

{
  "affected": [
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2021-28041",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:20.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "openssh-client",
            "binary_version": "1:8.2p1-4ubuntu0.2"
          },
          {
            "binary_name": "openssh-server",
            "binary_version": "1:8.2p1-4ubuntu0.2"
          },
          {
            "binary_name": "openssh-sftp-server",
            "binary_version": "1:8.2p1-4ubuntu0.2"
          },
          {
            "binary_name": "openssh-tests",
            "binary_version": "1:8.2p1-4ubuntu0.2"
          },
          {
            "binary_name": "ssh",
            "binary_version": "1:8.2p1-4ubuntu0.2"
          },
          {
            "binary_name": "ssh-askpass-gnome",
            "binary_version": "1:8.2p1-4ubuntu0.2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "openssh",
        "purl": "pkg:deb/ubuntu/openssh@1:8.2p1-4ubuntu0.2?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1:8.2p1-4ubuntu0.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1:8.0p1-6build1",
        "1:8.1p1-1",
        "1:8.1p1-5",
        "1:8.2p1-4",
        "1:8.2p1-4ubuntu0.1"
      ]
    }
  ],
  "aliases": [],
  "details": "It was discovered that the OpenSSH ssh-agent incorrectly handled memory. A\nremote attacker able to connect to the agent could use this issue to cause\nit to crash, resulting in a denial of service, or possibly execute\narbitrary code.\n",
  "id": "USN-4762-1",
  "modified": "2026-02-10T04:42:05Z",
  "published": "2021-03-10T14:30:08Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-4762-1"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-28041"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "openssh vulnerability",
  "upstream": [
    "UBUNTU-CVE-2021-28041"
  ]
}



Log in or create an account to share your comment.




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.