CVE-2021-22161

In OpenWrt 19.07.x before 19.07.7, when IPv6 is used, a routing loop can occur that generates excessive network traffic between an affected device and its upstream ISP's router. This occurs when a link prefix route points to a point-to-point link, a destination IPv6 address belongs to the prefix and is not a local IPv6 address, and a router advertisement is received with at least one global unique IPv6 prefix for which the on-link flag is set. This affects the netifd and odhcp6c packages.

CVSS v3 6.5 MEDIUM
CVSS v2.0 3.3 LOW

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector ADJACENT_NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

3.3^/10

CVSS v2.0 : LOW

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

Exploitability : 6.5 / Impact : 2.9

Access Vector ADJACENT_NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

References

Link	Resource
https://openwrt.org/advisory/2021-02-02-1	Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:o:openwrt:openwrt:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2021-02-07 23:15

Updated : 2023-05-24 15:01

NVD link : CVE-2021-22161

Mitre link : CVE-2021-22161

CVE.ORG link : CVE-2021-22161

JSON object : View

Products Affected

openwrt

openwrt

CWE

CWE-835

Loop with Unreachable Exit Condition ('Infinite Loop')

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