GEN:SID | 1:2119 |
Message | IMAP rename literal overflow attempt |
Summary | This event is generated when a remote user uses the IMAP RENAME command to send a suspiciously long string to port 143 on an internal server. This may indicate an attempt to exploit a buffer overflow vulnerability in the IMAP RENAME 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.
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Impact | |
Detailed Information | When a large amount of data is sent to a vulnerable IMAP server in the RENAME command, a buffer overflow condition may occur. This can allow the attacker to access the shell, where arbitrary code can be executed. Note that this exploit can only be attempted by a user with a valid IMAP account.
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Affected Systems | Any operating system that runs University of Washington imapd versions 10.234 or 12.264.
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Attack Scenarios | An attacker with an IMAP account on the server can send a sufficiently long RENAME command to the IMAP server, creating a buffer overflow condition. This can then allow the attacker to gain shell access on the compromised server, possibly leading to the execution of arbitrary code.
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Ease of Attack | Simple. Exploits exist, but the user must have a valid IMAP account on the server.
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Corrective Action | Apply the appropriate patches for your operating system.
Check the host for signs of compromise.
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Additional References | Bugtraq http://www.securityfocus.com/bid/1110
CVE http://cve.mitre.org/cgi-bin/cvekey.cgi?keyword=CVE-2000-0284
Nessus http://cgi.nessus.org/plugins/dump.php3?id=10374
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Rule References | bugtraq: 1110
cve: 2000-0284
nessus: 10374
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