VDB-92719 · CVE-2016-4921 · BID 93532

Juniper Junos up to 16.0 IPv6 resource management

CVSS Meta Temp Score
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CTI Interest Score
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7.4$0-$5k0.00

Summaryinfo

A vulnerability marked as problematic has been reported in Juniper Junos up to 16.0. Affected by this vulnerability is an unknown functionality of the component IPv6 Handler. This manipulation causes resource management. The identification of this vulnerability is CVE-2016-4921. It is possible to initiate the attack remotely. There is no exploit available. It is suggested to upgrade the affected component.

Detailsinfo

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 vulnerability is also documented in the databases at SecurityFocus (BID 93532†) and SecurityTracker (ID 1037014†). The entry VDB-92721 is related to this item. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

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

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

NVD Base Score: 🔍

Exploitinginfo

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

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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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 (🔍)
GCVE (CVE): GCVE-0-2016-4921
GCVE (VulDB): GCVE-100-92719
SecurityFocus: 93532 - Juniper Junos CVE-2016-4921 Denial of Service Vulnerability
SecurityTracker: 1037014

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: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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