Dns2tcp dns_simple_decode() and dns_decode() buffer overflow

dns2tcp-dnssimpledecode-dnsdecode-bo (44974) The risk level is classified as HighHigh Risk

Description:

Dns2tcp is vulnerable to a buffer overflow, caused by a signedness error in the dns_simple_decode() and dns_decode() functions. By sending a specially-crafted request or reply, 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: 5.5
  Exploitability: Unproven
  Remediation Level: Official-Fix
  Report Confidence: Confirmed

Consequences:

Gain Access

Remedy:

Upgrade to the latest version of Dns2tcp (0.4.1 or later), available from the HSC Web site. See References.

References:

  • HSC Web site: Dns2tcp.
  • BID-31080: Dns2tcp Multiple Remote Buffer Overflow Vulnerabilities
  • CVE-2008-3910: dns2tcp before 0.4.1 does not properly handle negative values in a certain length field in the input argument to the (1) dns_simple_decode or (2) dns_decode function, which allows remote attackers to overwrite a buffer and have unspecified other impact.
  • OSVDB ID: 48303: dns2tcp DNS Decoding Multiple Function Remote Overflows
  • SA31734: Dns2tcp Request / Reply Processing Signedness Vulnerability

Platforms Affected:

  • Hervé Schauer Consultants Dns2tcp 0.4

Reported:

Sep 02, 2008

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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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