Citadel makeuserkey() buffer overflow

citadel-makeuserkey-bo (39807)

High Risk

Description:

Citadel is vulnerable to a buffer overflow, caused by improper bounds checking by the makeuserkey() function. By sending an overly long argument to the "RCPT TO" SMTP command, a remote attacker could overflow a buffer and execute arbitrary code on the system or cause the application to crash.

*CVSS:

Base Score:	7.5
Access Vector:	Network
Access Complexity:	Low
Authentication:	None
Confidentiality Impact:	Partial
Integrity Impact:	Partial
Availability Impact:	Partial
Temporal Score:	6.2
Exploitability:	Functional
Remediation Level:	Official-Fix
Report Confidence:	Confirmed

Consequences:

Gain Access

Remedy:

Upgrade to the latest version of Citadel (7.24 or later), available from the Citadel Web site. See References.

References:

• Citadel Web site: Citadel.
• BID-27376: Citadel SMTP RCPT TO Remote Buffer Overflow Vulnerability
• CVE-2008-0394: Buffer overflow in Citadel SMTP server 7.10 and earlier allows remote attackers to execute arbitrary code via a long RCPT TO command, which is not properly handled by the makeuserkey function. NOTE: some of these details were obtained from third party information.
• OSVDB ID: 40516: Citadel SMTP makeuserkey Function RCPT TO Command Remote Overflow
• SA28590: Citadel SMTP "makeuserkey()" Buffer Overflow Vulnerability
• SECTRACK ID: 1019255: Citadel Buffer Overflow in SMTP Service Lets Remote Users Execute Arbitrary Code
• VUPEN/ADV-2008-0252: Citadel SMTP RCPT TO Command Remote Buffer Overflow Vulnerability

Platforms Affected:

• Citadel SMTP 7.10

Reported:

Jan 21, 2008

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