Terminal Server Client username buffer overflow

terminal-server-username-bo (65101) The risk level is classified as HighHigh Risk

Description:

Terminal Server Client (tsclient) is vulnerable to a stack-based buffer overflow, caused by improper bounds checking by the tsc_launch_remote() function when processing the username parameter. By persuading a victim to open a specially-crafted RDP file containing an overly long string, a remote attacker could overflow a buffer and execute arbitrary code on the system or cause the application to crash.

*CVSS:

Base Score: 6.8
  Access Vector: Network
  Access Complexity: Medium
  Authentication: None
  Confidentiality Impact: Partial
  Integrity Impact: Partial
  Availability Impact: Partial
 
Temporal Score: 5.5
  Exploitability: Unproven
  Remediation Level: Unavailable
  Report Confidence: Uncorroborated

Consequences:

Gain Access

Remedy:

No remedy available as of September 1, 2014.

References:

  • Offensive Security Exploit Database [02-02-2011]: Terminal Server Client .rdp Denial of Service.
  • Terminal Server Client: Terminal Server Client.
  • BID-46099: Terminal Server Client '.rdp' File Processing Remote Denial of Service Vulnerability
  • CVE-2011-0901: Multiple stack-based buffer overflows in the tsc_launch_remote function (src/support.c) in Terminal Server Client (tsclient) 0.150, and possibly other versions, allow user-assisted remote attackers to execute arbitrary code via a .RDP file with a long (1) username, (2) password, or (3) domain argument. NOTE: the provenance of this information is unknown; the details are obtained solely from third party information.
  • OSVDB ID: 70749: Terminal Server Client (tsclient) src/support.c tsc_launch_remote() Function Multiple Parameter RDP File Handling Overflows
  • SA43120: Terminal Server Client (tsclient) RDP File Processing Buffer Overflows

Platforms Affected:

  • Terminal Server Client Terminal Server Client 0.150
  • Terminal Server Client Terminal Server Client 2.0.1

Reported:

Feb 02, 2011

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