Resource Management Errors Affecting tor package, versions <0.2.3.25-1


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
3.15% (87th percentile)

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  • Snyk IDSNYK-ECHOLATEST-TOR-19166169
  • published22 Aug 2026
  • disclosed1 Jan 2013

Introduced: 1 Jan 2013

CVE-2012-5573  (opens in a new tab)
CWE-399  (opens in a new tab)

How to fix?

Upgrade Echo:latest tor to version 0.2.3.25-1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream tor package and not the tor package as distributed by Echo. See How to fix? for Echo:latest relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1