Denial of Service and Flow-Control Bypass Vulnerability in Tor's connection_edge_process_relay_cell Function

CVE-2012-5573 · MEDIUM Severity

AV:N/AC:L/AU:N/C:N/I:N/A:P

The connection_edge_process_relay_cell function in or/relay.c in Tor before 0.2.3.25 maintains circuits even if an unexpected SENDME cell arrives, which might allow remote attackers to cause a denial of service (memory consumption or excessive cell reception rate) or bypass intended flow-control restrictions via a RELAY_COMMAND_SENDME command.

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