Original description
The "echo simulation" traffic analysis countermeasure in OpenSSH before 2.9.9p2 sends an additional echo packet after the password and carriage return is entered, which could allow remote attackers to determine that the countermeasure is being used.
Affected software
- OpenSSH ≤ 2.9.9p2 exact match
Details
- Published
- 2001-09-27
- Last modified
- 2026-06-16
- CVSS vector
AV:N/AC:L/Au:N/C:P/I:N/A:N
References
Track these versions on your own servers
InfraGuard collects installed software versions from every server and flags the ones with known vulnerabilities. Self-hosted — nothing leaves your network.
This product uses data from the NVD API but is not endorsed or certified by the NVD. CVE® is a registered trademark of The MITRE Corporation; CVE records are used under the CVE Program Terms of Use.