CVE-2015-2689 Information

Description

Tor before 0.2.4.26 and 0.2.5.x before 0.2.5.11 does not properly handle pending-connection resolve states during periods of high DNS load which allows remote attackers to cause a denial of service (assertion failure and daemon exit) via crafted packets.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Reference

https://lists.torproject.org/pipermail/tor-talk/2015-March/037281.html https://trac.torproject.org/projects/tor/ticket/14129

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

7.5