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.
Published 2006-10-10 23:07:00
Updated 2018-10-17 21:41:48
Source MITRE
View at NVD,
Vulnerability category: Information leak

Exploit prediction scoring system (EPSS) score for CVE-2006-5229

Probability of exploitation activity in the next 30 days EPSS Score History
~ 82 %
Percentile, the proportion of vulnerabilities that are scored at or less

Metasploit modules for CVE-2006-5229

  • SSH Username Enumeration
    First seen: 2020-04-26
    This module uses a malformed packet or timing attack to enumerate users on an OpenSSH server. The default action sends a malformed (corrupted) SSH_MSG_USERAUTH_REQUEST packet using public key authentication (must be enabled) to enumerate users. On

CVSS scores for CVE-2006-5229

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen

CWE ids for CVE-2006-5229

Vendor statements for CVE-2006-5229

  • Red Hat 2006-10-11
    Red Hat has been unable to reproduce this flaw and believes that the reporter was experiencing behavior specific to his environment. We will not be releasing update to address this issue.

Products affected by CVE-2006-5229

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