Tor does not verify a node's uptime and bandwidth advertisements, which allows remote attackers who operate a low resource node to make false claims of greater resources, which places the node into use for many circuits and compromises the anonymity of traffic sources and destinations.
CVSS Severity (version 2.0):
Impact Subscore: 2.9
Exploitability Subscore: 8.6
CVSS Version 2 Metrics:
Access Vector: Network exploitable
Access Complexity: Medium
Authentication: Not required to exploit
Impact Type: Allows unauthorized disclosure of information
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[or-talk] 20070225 "Low-Resource Routing Attacks Against Anonymous Systems"
[or-talk] 20070225 Re: ISP controlling entry/exti ("Low-Resource Routing Attacks Against Anonymous Systems")
[or-talk] 20070225 Re: "Low-Resource Routing Attacks Against Anonymous Systems"
Vulnerable software and versions