GEN:SID 1:1904
Message IMAP find overflow attempt
Summary This event is generated when a remote attacker sends an IMAP FIND command with a malformed argument to an internal IMAP server. This may indicate an attempt to exploit a buffer overflow vulnerability in the IMAP FIND command.
Impact Possible shell access on the IMAP server, leading to arbitrary code execution. The attacker must have a valid IMAP account on the mail server to attempt this exploit.
Detailed Information When a FIND command with a malformed and overly long argument is sent to a vulnerable IMAP server, a buffer overflow condition may occur. This can allow an attacker to execute arbitrary code from the command shell. Note that this exploit can only be attempted by a user with a valid IMAP account.
Affected Systems Any operating system running University of Washington imapd versions 10.234 or 12.264.
Attack Scenarios An attacker with an IMAP account on the server can send a malformed and sufficiently long FIND command to the IMAP server, creating a buffer overflow condition. This can then allow the attacker to execute arbitrary shell code on the compromised server.
Ease of Attack Simple. Exploits exist, but the user must have a valid IMAP account on the server.
Corrective Action Apply the patch for your current version of imapd appropriate to your operating system.
Additional References Bugtraq
http://www.securityfocus.com/bid/1110
Rule References bugtraq: 1110
cve: 2000-0284
nessus: 10374