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TI-2001-01428 Aliases CVE-2001-1476GHSA-438j-26hg-98wc

SSH before 2.0, with RC4 encryption and the "disallow NULL passwords" option enabled…

Priority LOW 35Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
— Not recorded in CVSS 2.0
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
Partial · Partial · Partial
Fix status
No fix listed

Attack profile from CVSS 2.0 · NVD. Fix status from CNA.

Summary

SSH before 2.0, with RC4 encryption and the "disallow NULL passwords" option enabled, makes it easier for remote attackers to guess portions of user passwords by replaying user sessions with certain modifications, which trigger different messages depending on whether the guess is correct or not.

Why it matters now

EPSS 0.01007 63rd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 8

CPEVersionsRoleVendor
cpe:2.3:a:ssh:ssh:1.2.24:*:*:*:*:*:*:*1.2.24VulnerableSSH
cpe:2.3:a:ssh:ssh:1.2.25:*:*:*:*:*:*:*1.2.25VulnerableSSH
cpe:2.3:a:ssh:ssh:1.2.26:*:*:*:*:*:*:*1.2.26VulnerableSSH
cpe:2.3:a:ssh:ssh:1.2.27:*:*:*:*:*:*:*1.2.27VulnerableSSH
cpe:2.3:a:ssh:ssh:1.2.28:*:*:*:*:*:*:*1.2.28VulnerableSSH
cpe:2.3:a:ssh:ssh:1.2.29:*:*:*:*:*:*:*1.2.29VulnerableSSH
cpe:2.3:a:ssh:ssh:1.2.30:*:*:*:*:*:*:*1.2.30VulnerableSSH
cpe:2.3:a:ssh:ssh:1.2.31:*:*:*:*:*:*:*1.2.31VulnerableSSH
  • cpe:2.3:a:ssh:ssh:1.2.24:*:*:*:*:*:*:* Versions 1.2.24 Vulnerable ·SSH
  • cpe:2.3:a:ssh:ssh:1.2.25:*:*:*:*:*:*:* Versions 1.2.25 Vulnerable ·SSH
  • cpe:2.3:a:ssh:ssh:1.2.26:*:*:*:*:*:*:* Versions 1.2.26 Vulnerable ·SSH
  • cpe:2.3:a:ssh:ssh:1.2.27:*:*:*:*:*:*:* Versions 1.2.27 Vulnerable ·SSH
  • cpe:2.3:a:ssh:ssh:1.2.28:*:*:*:*:*:*:* Versions 1.2.28 Vulnerable ·SSH
  • cpe:2.3:a:ssh:ssh:1.2.29:*:*:*:*:*:*:* Versions 1.2.29 Vulnerable ·SSH
  • cpe:2.3:a:ssh:ssh:1.2.30:*:*:*:*:*:*:* Versions 1.2.30 Vulnerable ·SSH
  • cpe:2.3:a:ssh:ssh:1.2.31:*:*:*:*:*:*:* Versions 1.2.31 Vulnerable ·SSH

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2001-1476
  2. 2026-10-03 Alias added: GHSA-438j-26hg-98wc

References

Exploit 1

  • TI-2023-26623 The SSH transport protocol with certain OpenSSH extensions, found in OpenSSH before 9.6… CVSS 3.1MEDIUM 5.9
  • TI-2001-00144 CORE SDI SSH1 CRC-32 compensation attack detector allows remote attackers to execute… CVSS 2.0HIGH 10.0
  • TI-1999-00245 A race condition in the authentication agent mechanism of sshd 1.2.17 allows an attacker… CVSS 2.0HIGH 10.0
  • TI-1999-00013 Stolen credentials from SSH clients via ssh-agent program, allowing other local users to… CVSS 3.1HIGH 8.4
  • TI-2001-00557 The SSH protocols 1 and 2 (aka SSH-2) as implemented in OpenSSH and other packages have… CVSS 2.0HIGH 7.5
  • TI-2001-01425 The SSH-1 protocol allows remote servers to conduct man-in-the-middle attacks and replay… CVSS 2.0HIGH 7.5
See all 22 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences