Tor traffic routing denial of service
| tor-trafficrouting-dos (28686) |  Medium Risk |
Description:
Tor is vulnerable to a denial of service, caused by multiple communication handling errors. If the victim's initial entry node has been set to point to a compromised Tor server, a remote attacker could use the victim's client as a Tor server and route Tor network traffic through the client and possibly cause the victim's client to crash.
Note: This vulnerability also affects ScatterChat, which uses a vulnerable version of Tor.
*CVSS:
| Base Score: | 4.2 |
| Access Vector: | Remote |
| Access Complexity: | High |
| Authentication: | Not Required |
| Confidentiality Impact: | None |
| Integrity Impact: | Partial |
| Availability Impact: | Partial |
| Temporal Score: | 3.1 |
| Exploitability: | Unproven |
| Remediation Level: | Official-Fix |
| Report Confidence: | Confirmed |
Consequences:
Denial of Service
Remedy:
For Tor:
Upgrade to the latest version of Tor, 0.1.1.23 or later, available from the Tor Web site. See References.
For ScatterChat:
Upgrade to the latest version of ScatterChat, 1.0.2 or later, available from the ScatterChat Web site. See References.
References:
- Full-Disclosure Mailing List, Sat Sep 02 2006 - 20:06:11 CDT : ScatterChat Advisory 2006-02: Win32 Tor Client Routing and Denial of Service Vulnerabilities.
- ScatterChat Web site: ScatterChat.
- Tor Web site: Tor.
- tor-announce Mailing List, Tue, 29 Aug 2006 05:29:39 -0400: Tor security advisory: clients will route traffic.
- BID-19785: Tor Hostile Traffic Routing and Denial of Service Vulnerabilities
- CVE-2006-4508: Unspecified vulnerability in (1) Tor 0.1.0.x before 0.1.0.18 and 0.1.1.x before 0.1.1.23, and (2) ScatterChat before 1.0.2, allows remote attackers operating a Tor entry node to route arbitrary Tor traffic through clients or cause a denial of service (flood) via unspecified vectors.
- SA21708: Tor Denial of Service and Traffic Routing
- SA21725: ScatterChat Tor Denial of Service and Traffic Routing
Platforms Affected:
- ScatterChat ScatterChat prior to 1.0.2
- Tor Tor prior to 0.1.1.23
Reported:
Aug 29, 2006
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For corrections or additions please email xforce@iss.net
* According to the Forum of Incident Response and Security Teams (FIRST), the Common Vulnerability Scoring System (CVSS) is an "industry open standard designed to convey vulnerability severity and help to determine urgency and priority of response." IBM PROVIDES THE CVSS SCORES "AS IS" WITHOUT WARRANTY OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY.
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.