NuFW samp_send() denial of service

nufw-sampsend-dos (38153)

Medium Risk

Description:

NuFW is vulnerable to a denial of service, caused by improper bounds checking by the samp_send() function when calling the sasl_encode64() function. A remote attacker could exploit this vulnerability to cause a denial of service and possibly trigger a heap-based buffer overflow with three bytes on the vulnerable system.

*CVSS:

Base Score:	5
Access Vector:	Network
Access Complexity:	Low
Authentication:	None
Confidentiality Impact:	None
Integrity Impact:	None
Availability Impact:	Partial
Temporal Score:	3.7
Exploitability:	Unproven
Remediation Level:	Official-Fix
Report Confidence:	Confirmed

Consequences:

Denial of Service

Remedy:

Upgrade to the latest version of NuFW (2.2.7 or later), available from the NuFW Web site. See References.

References:

• NuFW Web site: NuFW 2.2.7.
• BID-26251: NuFW SAMP_SEND Heap Based Buffer Overflow Vulnerability
• CVE-2007-5723: Heap-based buffer overflow in the samp_send function in nuauth/sasl.c in NuFW before 2.2.7 allows remote attackers to cause a denial of service via unspecified input on which base64 encoding is performed. NOTE: some of these details are obtained from third party information.
• SA27442: NuFW "samp_send()" Buffer Overflow Vulnerability

Platforms Affected:

• NuFW NuFW prior to 2.2.7

Reported:

Oct 29, 2007

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The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.

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