Technical Description

A vulnerability has been identified in Sun Solaris, which could be exploited by remote attackers to compromise a vulnerable system. This issue is due to an error in the telnet daemon (in.telnetd) that fails to properly validate authentication information before being passed to the login process, which could be exploited by remote attackers to bypass authentication and gain unauthorized access to an affected system with the privileges of an arbitrary user (including the "root" user if the host is configured to accept telnet logins as root).

Note : A worm exploiting this vulnerability has been discovered in the wild.

Affected Products

Sun Solaris 10

Solution

Solaris 10 (SPARC) - Apply patch 120068-02 or later
Solaris 10 (x86) - Apply patch 120069-02 or later

References

http://www.vupen.com/english/advisories/2007/0560
http://sunsolve.sun.com/search/document.do?assetkey=1-26-102802-1
http://blogs.sun.com/security/entry/solaris_in_telnetd_worm_seen
http://www.com-winner.com/0day_was_the_case_that_they_gave_me.pdf

Credits

Vulnerability reported by kcope

ChangeLog

2007-02-12 : Initial release
2007-02-12 : Updated References
2007-02-14 : Updated Solution
2007-02-28 : Worm in the wild

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