SSH 1.2.25, 1.2.23, and other versions, when used in in CBC (Cipher Block Chaining) or…
Priority LOW 29Published · 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
SSH 1.2.25, 1.2.23, and other versions, when used in in CBC (Cipher Block Chaining) or CFB (Cipher Feedback 64 bits) modes, allows remote attackers to insert arbitrary data into an existing stream between an SSH client and server by using a known plaintext attack and computing a valid CRC-32 checksum for the packet, aka the "SSH insertion attack."
Why it matters now
EPSS 0.03442 89th 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
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-1999-1085
- 2026-10-03 Alias added: GHSA-qfm6-qcw8-g9xg
References
More SSH Secure Shell vulnerabilities
- TI-2001-00538 SSH Secure Shell 3.0.0 on Unix systems does not properly perform password authentication… CVSS 2.0HIGH 7.2
- TI-2003-01023 SSH Secure Shell before 3.2.9 allows remote attackers to cause a denial of service via malformed BER/DER packets. CVSS 2.0MEDIUM 5.0
Sources
- CVE-1999-1085 · CVE Program
- CVE-1999-1085 · NVD
- FIRST EPSS
- GHSA-qfm6-qcw8-g9xg · GitHub Advisory Database · CC BY 4.0
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