Integer signedness error in the ssh2_rdpkt function in PuTTY before 0.56 allows remote…
Priority MEDIUM 53Published · 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
- Complete · Complete · Complete
- Fix status
- No fix listed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA.
Summary
Integer signedness error in the ssh2_rdpkt function in PuTTY before 0.56 allows remote attackers to execute arbitrary code via a SSH2_MSG_DEBUG packet with a modified stringlen parameter, which leads to a buffer overflow.
Why it matters now
EPSS 0.07363 94th 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
| 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 · 10
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:putty:putty:0.48:*:*:*:*:*:*:* | 0.48 | Vulnerable | PuTTY |
| cpe:2.3:a:putty:putty:0.49:*:*:*:*:*:*:* | 0.49 | Vulnerable | PuTTY |
| cpe:2.3:a:putty:putty:0.50:*:*:*:*:*:*:* | 0.50 | Vulnerable | PuTTY |
| cpe:2.3:a:putty:putty:0.51:*:*:*:*:*:*:* | 0.51 | Vulnerable | PuTTY |
| cpe:2.3:a:putty:putty:0.52:*:*:*:*:*:*:* | 0.52 | Vulnerable | PuTTY |
| cpe:2.3:a:putty:putty:0.53:*:*:*:*:*:*:* | 0.53 | Vulnerable | PuTTY |
| cpe:2.3:a:putty:putty:0.53b:*:*:*:*:*:*:* | 0.53b | Vulnerable | PuTTY |
| cpe:2.3:a:putty:putty:0.54:*:*:*:*:*:*:* | 0.54 | Vulnerable | PuTTY |
| cpe:2.3:a:putty:putty:0.55:*:*:*:*:*:*:* | 0.55 | Vulnerable | PuTTY |
| cpe:2.3:a:tortoisecvs:tortoisecvs:1.8:*:*:*:*:*:*:* | 1.8 | Vulnerable | Tortoisecvs |
- cpe:2.3:a:putty:putty:0.48:*:*:*:*:*:*:* Versions 0.48 Vulnerable ·PuTTY
- cpe:2.3:a:putty:putty:0.49:*:*:*:*:*:*:* Versions 0.49 Vulnerable ·PuTTY
- cpe:2.3:a:putty:putty:0.50:*:*:*:*:*:*:* Versions 0.50 Vulnerable ·PuTTY
- cpe:2.3:a:putty:putty:0.51:*:*:*:*:*:*:* Versions 0.51 Vulnerable ·PuTTY
- cpe:2.3:a:putty:putty:0.52:*:*:*:*:*:*:* Versions 0.52 Vulnerable ·PuTTY
- cpe:2.3:a:putty:putty:0.53:*:*:*:*:*:*:* Versions 0.53 Vulnerable ·PuTTY
- cpe:2.3:a:putty:putty:0.53b:*:*:*:*:*:*:* Versions 0.53b Vulnerable ·PuTTY
- cpe:2.3:a:putty:putty:0.54:*:*:*:*:*:*:* Versions 0.54 Vulnerable ·PuTTY
- cpe:2.3:a:putty:putty:0.55:*:*:*:*:*:*:* Versions 0.55 Vulnerable ·PuTTY
- cpe:2.3:a:tortoisecvs:tortoisecvs:1.8:*:*:*:*:*:*:* Versions 1.8 Vulnerable ·Tortoisecvs
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2004-1008
- 2026-10-03 Alias added: GHSA-2rqg-r6g4-rvxh
References
Patch 1
Sources
- CVE-2004-1008 · CVE Program
- CVE-2004-1008 · NVD
- FIRST EPSS
- GHSA-2rqg-r6g4-rvxh · GitHub Advisory Database · CC BY 4.0
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