FrSIRT - FreeSSHd Key Exchange Algorithm String Remote Buffer Overflow Vulnerability / Exploit (Security Advisories)

French Security Incident Response Team

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FreeSSHd Key Exchange Algorithm String Remote Buffer Overflow Vulnerability

Title : FreeSSHd Key Exchange Algorithm String Remote Buffer Overflow Vulnerability
Advisory ID : FrSIRT/ADV-2006-1786
CVE ID : CVE-2006-2407
Rated as : Critical

Remotely Exploitable : Yes
Locally Exploitable : Yes
Release Date : 2006-05-12

Advisory Details

Description

Affected Products

Solution

Technical Description

A vulnerability has been identified in FreeSSHd, which could be exploited by remote attackers to execute arbitrary commands. This flaw is due to a buffer overflow error when handling a specially crafted key exchange algorithm string received from an SSH client, which could be exploited by remote attackers to compromise a vulnerable system. For additional information, see : FrSIRT/ADV-2006-1785

Credits

Vulnerability reported by Gerry Eisenhaur

ChangeLog

2006-05-12 : Initial release
2006-05-17 : Updated Solution

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