dsocks tor_resolve function buffer overflow

dsocks-torresolve-bo (28762)

Low Risk

Description:

dsocks is vulnerable to a buffer overflow, caused by improper bounds checking by the name variable in the tor_resolve function. By sending an overly long URL to the hosted lookup functions, a remote attacker could overflow the 'buf' buffer and cause the application to crash.

*CVSS:

Base Score:	2.8
Access Vector:	Remote
Access Complexity:	High
Authentication:	Not Required
Confidentiality Impact:	None
Integrity Impact:	None
Availability Impact:	Partial
Temporal Score:	2.1
Exploitability:	Unproven
Remediation Level:	Official-Fix
Report Confidence:	Confirmed

Consequences:

Denial of Service

Remedy:

Upgrade to the latest version of dsocks (1.4 or later), available from the dsocks Web site. See References.

References:

• dsocks Web page: dsocks.
• Full-Disclosure Mailing List, Tue Sep 05 2006 - 05:41:36 CDT: Buffer overflow vulnerability in dsocks.
• BID-19852: DSocks Name Variable Buffer Overflow Vulnerability
• CVE-2006-4611: Buffer overflow in the _tor_resolve function in dsocks.c in dsocks before 1.4 allows remote attackers to execute arbitrary code via unspecified vectors, possibly involving a long node name.
• SA21771: dsocks "_tor_resolve" Buffer Overflow Vulnerability
• VUPEN/ADV-2006-3526: dsocks _tor_resolve() Hostname Handling Remote Buffer Overflow Vulnerability

Platforms Affected:

• Dsocks dsocks 1.3 and prior

Reported:

Sep 05, 2006

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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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