VDB-169360 · CVE-2021-22161 · GCVE-0-2021-22161

OpenWrt up to 19.07.6 IPv6 Router Advertisement infinite loop

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.
5.1	$0-$5k	0.00

Summaryinfo

A vulnerability, which was classified as problematic, was found in OpenWrt up to 19.07.6. This issue affects some unknown processing of the component IPv6 Router Advertisement Handler. Executing a manipulation can lead to infinite loop. This vulnerability is registered as CVE-2021-22161. The attack requires access to the local network. No exploit is available. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in OpenWrt up to 19.07.6. It has been declared as problematic. This vulnerability affects some unknown functionality of the component IPv6 Router Advertisement Handler. The manipulation with an unknown input leads to a infinite loop vulnerability. The CWE definition for the vulnerability is CWE-835. The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop. As an impact it is known to affect availability.

The weakness was published 02/08/2021. The advisory is shared for download at openwrt.org. This vulnerability was named CVE-2021-22161. There are neither technical details nor an exploit publicly available.

Upgrading to version 19.07.7 eliminates this vulnerability.

VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Name

OpenWrt

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.4
VulDB Meta Temp Score: 5.3

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.5
NVD Vector: 🔍

CVSSv2info

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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Infinite loop
CWE: CWE-835 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: OpenWrt 19.07.7

Timelineinfo

01/05/2021 🔍
02/08/2021 +34 days 🔍
02/08/2021 +0 days 🔍
02/25/2021 +17 days 🔍

Sourcesinfo

Advisory: openwrt.org
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2021-22161 (🔍)
GCVE (CVE): GCVE-0-2021-22161
GCVE (VulDB): GCVE-100-169360

Entryinfo

Created: 02/08/2021 07:47
Updated: 02/25/2021 09:05
Changes: 02/08/2021 07:47 (37), 02/25/2021 09:00 (6), 02/25/2021 09:05 (18)
Complete: 🔍
Cache ID: 216::103