The RC4 stream cipher as used by SSH1 allows remote attackers to modify messages without…
Priority LOW 25Published · 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
- None · Partial · None
- Fix status
- No fix listed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA.
Summary
The RC4 stream cipher as used by SSH1 allows remote attackers to modify messages without detection by XORing the original message's cyclic redundancy check (CRC) with the CRC of a mask consisting of all the bits of the original message that were modified.
Why it matters now
EPSS 0.01214 68th 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
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 8
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:ssh:ssh:1.2.24:*:*:*:*:*:*:* | 1.2.24 | Vulnerable | SSH |
| cpe:2.3:a:ssh:ssh:1.2.25:*:*:*:*:*:*:* | 1.2.25 | Vulnerable | SSH |
| cpe:2.3:a:ssh:ssh:1.2.26:*:*:*:*:*:*:* | 1.2.26 | Vulnerable | SSH |
| cpe:2.3:a:ssh:ssh:1.2.27:*:*:*:*:*:*:* | 1.2.27 | Vulnerable | SSH |
| cpe:2.3:a:ssh:ssh:1.2.28:*:*:*:*:*:*:* | 1.2.28 | Vulnerable | SSH |
| cpe:2.3:a:ssh:ssh:1.2.29:*:*:*:*:*:*:* | 1.2.29 | Vulnerable | SSH |
| cpe:2.3:a:ssh:ssh:1.2.30:*:*:*:*:*:*:* | 1.2.30 | Vulnerable | SSH |
| cpe:2.3:a:ssh:ssh:1.2.31:*:*:*:*:*:*:* | 1.2.31 | Vulnerable | SSH |
- 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
- 2026-10-02 Threatist record created from CVE-2001-1469
- 2026-10-03 Alias added: GHSA-p383-6r42-q3rv
References
Exploit 1
More Ssh vulnerabilities
- 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
Sources
- CVE-2001-1469 · CVE Program
- CVE-2001-1469 · NVD
- FIRST EPSS
- GHSA-p383-6r42-q3rv · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences