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CVE-2006-5229

OpenSSH portable 4.1 on SUSE Linux, and possibly other platforms and versions, and possibly under limited configurations, allows remote attackers to determine valid usernames via timing discrepancies in which responses take longer for valid usernames than invalid ones, as demonstrated by sshtime. NOTE: as of 20061014, it appears that this issue is dependent on the use of manually-set passwords…

Severity
Low 2.6
Published
10 Oct 2006
Last changed
16 Jun 2026
Added to UpHeron
21 Oct 2026
Exploit chance
59% in the next 30 daysHigher than 99% of CVEs. EPSS by FIRST, 12 Nov 2026
Weakness
Information exposure (CWE-200)
Attack
Over the network · Only under certain conditions · No login needed
Attacker can
Read some data
CVSS vector
AV:N/AC:H/Au:N/C:P/I:N/A:N
Sources
NVD

Description

OpenSSH portable 4.1 on SUSE Linux, and possibly other platforms and versions, and possibly under limited configurations, allows remote attackers to determine valid usernames via timing discrepancies in which responses take longer for valid usernames than invalid ones, as demonstrated by sshtime. NOTE: as of 20061014, it appears that this issue is dependent on the use of manually-set passwords that causes delays when processing /etc/shadow due to an increased number of rounds.

From NVD.

Affected software

SoftwareAffected versions
OpenSSHServers and applications · cpe:a:openbsd:openssh
  • Version 4.1

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2006-5229
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2006-5229