VDB-92719 · CVE-2016-4921 · BID 93532

Juniper Junos up to 16.0 IPv6 resource management

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
7.4	$0-$5k	0.00

A vulnerability classified as critical was found in Juniper Junos up to 16.0 (Router Operating System). Affected by this vulnerability is an unknown code of the component IPv6 Handler. The manipulation with an unknown input leads to a resource management vulnerability. The CWE definition for the vulnerability is CWE-399. As an impact it is known to affect availability.

The weakness was shared 10/11/2016 as JSA10762 / 1017099 / 1037225 as confirmed knowledge base article (Website). It is possible to read the advisory at kb.juniper.net. The vendor cooperated in the coordination of the public release. This vulnerability is known as CVE-2016-4921 since 05/18/2016. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. The technical details are unknown and an exploit is not publicly available. The advisory points out:

By flooding a router with specially crafted IPv6 traffic, all available resources can be consumed, leading to the inability to store next hop information for legitimate traffic. In extreme cases, the crafted IPv6 traffic may result in a total resource exhaustion and kernel panic. The issue is triggered by traffic destined to the router. Transit traffic does not trigger the vulnerability.

The commercial vulnerability scanner Qualys is able to test this issue with plugin 43555 (Juniper JUNOS Denial of Service (IPv6) Vulnerability (JSA10762)).

Upgrading to version 12.3X48-D30, 13.3R10, 14.1R8, 14.1X53-D40, 14.2R6, 15.1F2-S5, 15.1F5-S2, 15.1F6, 15.1R3, 15.1X49-D40, 15.1X53-D70 or 16.1R1 eliminates this vulnerability.Proper firewalling of IPv6 is able to address this issue. The best possible mitigation is suggested to be upgrading to the latest version. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The entry 92721 is related to this item.

Productinfo

Type

Router Operating System

Vendor

Juniper

Name

Junos

Version

16.0

License

commercial

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.4

VulDB Base Score: 7.5
VulDB Temp Score: 7.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CNA Base Score: 7.5
CNA Vector (Juniper Networks, Inc.): 🔍

CVSSv2info

AV	AC	Au	C	I	A
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💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
unlock	unlock	unlock	unlock	unlock	unlock
unlock	unlock	unlock	unlock	unlock	unlock
unlock	unlock	unlock	unlock	unlock	unlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Resource management
CWE: CWE-399 / CWE-404
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	unlock	unlock	unlock	unlock
Today	unlock	unlock	unlock	unlock

OpenVAS ID: 802738
OpenVAS Name: Junos IPv6 DoS Vulnerability
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: Junos 12.3X48-D30/13.3R10/14.1R8/14.1X53-D40/14.2R6/15.1F2-S5/15.1F5-S2/15.1F6/15.1R3/15.1X49-D40/15.1X53-D70/16.1R1
Firewalling: 🔍

Timelineinfo

05/18/2016 🔍
10/11/2016 +146 days 🔍
10/11/2016 +0 days 🔍
10/12/2016 +1 days 🔍
10/14/2016 +2 days 🔍
10/15/2016 +1 days 🔍
10/13/2017 +363 days 🔍
09/26/2022 +1809 days 🔍

Sourcesinfo

Vendor: juniper.net

Advisory: JSA10762 / 1017099 / 1037225
Status: Confirmed
Confirmation: 🔍
Coordinated: 🔍

CVE: CVE-2016-4921 (🔍)
SecurityTracker: 1037014
SecurityFocus: 93532 - Juniper Junos CVE-2016-4921 Denial of Service Vulnerability

See also: 🔍

Entryinfo

Created: 10/15/2016 13:05
Updated: 09/26/2022 09:37
Changes: 10/15/2016 13:05 (67), 05/10/2019 17:53 (12), 09/26/2022 09:34 (3), 09/26/2022 09:37 (11)
Complete: 🔍