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Fedora 27 : tor (2017-bc2edc421d)

high Nessus Plugin ID 105965

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Synopsis

The remote Fedora host is missing a security update.

Description

update to upstream release 0.3.1.9. Fixes various CVEs :

 - CVE-2017-8819: Replay-cache ineffective for v2 onion services

 - CVE-2017-8820: Remote DoS attack against directory authorities

 - CVE-2017-8821: An attacker can make Tor ask for a password

 - CVE-2017-8822: Relays can pick themselves in a circuit path

 - CVE-2017-8823: Use-after-free in onion service v2

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website.
Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Solution

Update the affected tor package.

See Also

https://bodhi.fedoraproject.org/updates/FEDORA-2017-bc2edc421d

Plugin Details

Severity: High

ID: 105965

File Name: fedora_2017-bc2edc421d.nasl

Version: 1.5

Type: local

Agent: unix

Published: 1/15/2018

Updated: 1/6/2021

Supported Sensors: Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: Medium

Base Score: 6.8

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

CVSS v3

Risk Factor: High

Base Score: 8.1

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

Vulnerability Information

CPE: p-cpe:/a:fedoraproject:fedora:tor, cpe:/o:fedoraproject:fedora:27

Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list

Patch Publication Date: 12/17/2017

Vulnerability Publication Date: 12/3/2017

Reference Information

CVE: CVE-2017-8819, CVE-2017-8820, CVE-2017-8821, CVE-2017-8822, CVE-2017-8823