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FreeBSD : tor -- diffie-hellman handshake flaw (5fde5c30-0f4e-11da-bc01-000e0c2e438a)

medium Nessus Plugin ID 21434

Synopsis

The remote FreeBSD host is missing a security-related update.

Description

A tor advisory reports

Tor clients can completely loose anonymity, confidentiality, and data integrity if the first Tor server in their path is malicious.
Specifically, if the Tor client chooses a malicious Tor server for her first hop in the circuit, that server can learn all the keys she negotiates for the rest of the circuit (or just spoof the whole circuit), and then read and/or modify all her traffic over that circuit.

Solution

Update the affected package.

See Also

http://archives.seul.org/or/announce/Aug-2005/msg00002.html

http://www.nessus.org/u?f961be49

Plugin Details

Severity: Medium

ID: 21434

File Name: freebsd_pkg_5fde5c300f4e11dabc01000e0c2e438a.nasl

Version: 1.11

Type: local

Published: 5/13/2006

Updated: 1/6/2021

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.4

CVSS v2

Risk Factor: Medium

Base Score: 5

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:N

Vulnerability Information

CPE: p-cpe:/a:freebsd:freebsd:tor, cpe:/o:freebsd:freebsd

Required KB Items: Host/local_checks_enabled, Host/FreeBSD/release, Host/FreeBSD/pkg_info

Patch Publication Date: 8/17/2005

Vulnerability Publication Date: 8/11/2005

Reference Information

CVE: CVE-2005-2643