CVE-2017-8819 Information

Description

In Tor before 0.2.5.16 0.2.6 through 0.2.8 before 0.2.8.17 0.2.9 before 0.2.9.14 0.3.0 before 0.3.0.13 and 0.3.1 before 0.3.1.9 the replay-cache protection mechanism is ineffective for v2 onion services aka TROVE-2017-009. An attacker can send many INTRODUCE2 cells to trigger this issue.

CVSS Vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Reference

https://blog.torproject.org/new-stable-tor-releases-security-fixes-0319-03013-02914-02817-02516 https://bugs.torproject.org/24244 https://www.debian.org/security/2017/dsa-4054

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