Sun Solaris FTP server allows attackers to recover shadow file
| solaris-ftp-shadow-recovery (6422) |  Medium Risk |
Description:
The FTP server shipped with Sun Solaris is vulnerable to a buffer overflow in the glob() function. A remote attacker can overflow a buffer to cause the system to dump core. By using the "CWD~" command and the glob function exploit, an attacker can cause parts of the shadow file, which includes sensitive information such as encrypted passwords, to be dumped to core. A local attacker could exploit this vulnerability to obtain passwords of other users from the shadow file and possibly gain elevated privileges on the system.
Platforms Affected:
- Sun, Solaris 2.6
- Sun, Solaris 7.0
- Sun, Solaris 8
Remedy:
Apply the appropriate patch for your system, as listed in Sun(sm) Alert Notification 27843. See References:
Solaris 5: 103577-13
Solaris 5 x86: 103578-13
Solaris 5.1: 103603-16
Solaris 5.1 x86: 103604-16
Solaris 6: 106301-04
Solaris 6 x86: 106302-04
Solaris 7: 110646-03
Solaris 7 x86: 110647-03
Solaris 8: 111606-02
Solaris 8 x86: 111607-02
Consequences:
Gain Privileges
References:
- BugTraq Mailing List, Tue Apr 17 2001 - 01:44:49 CDT, Re: SUN SOLARIS 5.6/5.7 FTP Globbing Exploit ! at http://archives.neohapsis.com/archives/bugtraq/2001-04/0285.html.
- Sun Alert ID: 27843, FTP Server Buffer Overflows May Allow Unauthorized Root Access and Memory Leaks Cause Possible System Hangs at http://sunsolve.sun.com/pub-cgi/retrieve.pl?doc=fsalert%2F27843&zone_32=4436988.
- BID-2601: Solaris FTP Core Dump Shadow Password Recovery Vulnerability
- CVE-2001-0421: FTP server in Solaris 8 and earlier allows local and remote attackers to cause a core dump in the root directory, possibly with world-readable permissions, by providing a valid username with an invalid password followed by a CWD ~ command, which could release sensitive information such as shadowed passwords, or fill the disk partition.
Reported:
Apr 17, 2001
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