Deprecated SSHv1 Protocol Detection

highseverity

7.5CVSS score

6.3%likelihood of exploitation, next 30 days

94%of all CVEs are less likely

Readycheck to confirm it

SSHv1 is deprecated and has known cryptographic issues.

Impact

SSH protocol version 1 has known cryptographic weaknesses that allow attackers to potentially decrypt traffic, perform man-in-the-middle attacks, or compromise the integrity of SSH sessions.

Fix

Upgrade to SSH 2.4 or later.

How to confirm it

Positive when: contains "SSH-1"

Run it with nuclei: nuclei -id CVE-2001-1473 -u <target>. This check is not marked as verified by its authors.

The full check

id: CVE-2001-1473

info:
  name: Deprecated SSHv1 Protocol Detection
  author: iamthefrogy
  severity: high
  description: SSHv1 is deprecated and has known cryptographic issues.
  impact: |
    SSH protocol version 1 has known cryptographic weaknesses that allow attackers to potentially decrypt traffic, perform man-in-the-middle attacks, or compromise the integrity of SSH sessions.
  remediation: Upgrade to SSH 2.4 or later.
  reference:
    - https://www.kb.cert.org/vuls/id/684820
    - https://nvd.nist.gov/vuln/detail/CVE-2001-1473
    - http://www.kb.cert.org/vuls/id/684820
    - https://exchange.xforce.ibmcloud.com/vulnerabilities/6603
    - https://github.com/codine7/jungle
  classification:
    cvss-metrics: CVSS:2.0/AV:N/AC:L/Au:N/C:P/I:P/A:P
    cvss-score: 7.5
    cve-id: CVE-2001-1473
    cwe-id: CWE-310
    epss-score: 0.06268
    epss-percentile: 0.93629
    cpe: cpe:2.3:a:ssh:ssh:1.2.24:*:*:*:*:*:*:*
  metadata:
    max-request: 1
    vendor: ssh
    product: ssh
  tags: network,cve2001,cve,ssh,openssh,tcp,vuln
tcp:
  - host:
      - "{{Hostname}}"
    port: 22
    matchers:
      - type: word
        words:
          - "SSH-1"

References

Use this check only on systems you are authorised to test. Where the data comes from