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


Severity

Recommended
low

Based on Debian security rating

    Threat Intelligence

    EPSS
    3.76% (92nd percentile)

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  • Snyk ID SNYK-DEBIAN10-TOR-371061
  • published 1 Jan 2013
  • disclosed 1 Jan 2013

How to fix?

Upgrade Debian:10 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 Debian. See How to fix? for Debian:10 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 Scores

version 3.1
Expand this section

NVD

5.3 medium
  • Attack Vector (AV)
    Network
  • Attack Complexity (AC)
    Low
  • Privileges Required (PR)
    None
  • User Interaction (UI)
    None
  • Scope (S)
    Unchanged
  • Confidentiality (C)
    None
  • Integrity (I)
    None
  • Availability (A)
    Low