CVE-2016-8860 Information

Description

Tor before 0.2.8.9 and 0.2.9.x before 0.2.9.4-alpha had internal functions that were entitled to expect that buf_t data had NUL termination but the implementation of or/buffers.c did not ensure that NUL termination was present which allows remote attackers to cause a denial of service (client hidden service relay or authority crash) via crafted data.

CVSS Vector

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

Reference

http://openwall.com/lists/oss-security/2016/10/19/11 http://www.debian.org/security/2016/dsa-3694 http://www.securityfocus.com/bid/95116 https://blog.torproject.org/blog/tor-0289-released-important-fixes https://github.com/torproject/tor/commit/3cea86eb2fbb65949673eb4ba8ebb695c87a57ce https://security.gentoo.org/glsa/201612-45 https://trac.torproject.org/projects/tor/ticket/20384

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