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TI-1999-00393 Aliases CVE-1999-0398GHSA-4q8w-3rhr-5qw7

In some instances of SSH 1.2.27 and 2.0.11 on Linux systems, SSH will allow users with expired accounts to login.

Priority LOW 21Published · Updated

Key facts

Attack vector
Local
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

In some instances of SSH 1.2.27 and 2.0.11 on Linux systems, SSH will allow users with expired accounts to login.

Why it matters now

EPSS 0.00388 33rd percentileScored 2026-11-07
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 · 2

CPEVersionsRoleVendor
cpe:2.3:a:ssh:ssh:1.2.27:*:*:*:*:*:*:*1.2.27VulnerableSSH
cpe:2.3:a:ssh:ssh2:2.0.11:*:*:*:*:*:*:*2.0.11VulnerableSSH
  • cpe:2.3:a:ssh:ssh:1.2.27:*:*:*:*:*:*:* Versions 1.2.27 Vulnerable ·SSH
  • cpe:2.3:a:ssh:ssh2:2.0.11:*:*:*:*:*:*:* Versions 2.0.11 Vulnerable ·SSH

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-1999-0398
  2. 2026-10-03 Alias added: GHSA-4q8w-3rhr-5qw7

References

—

  • 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