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.
References
| Link | Resource |
|---|---|
| https://openwrt.org/advisory/2021-02-02-1 | Vendor Advisory |
Configurations
History
24 May 2023, 15:01
| Type | Values Removed | Values Added |
|---|---|---|
| CPE | cpe:2.3:o:openwrt:openwrt:*:*:*:*:*:*:*:* |
11 Feb 2021, 15:29
| Type | Values Removed | Values Added |
|---|---|---|
| CWE | CWE-835 | |
| References | (CONFIRM) https://openwrt.org/advisory/2021-02-02-1 - Vendor Advisory | |
| CPE | cpe:2.3:a:openwrt:openwrt:*:*:*:*:*:*:*:* | |
| CVSS |
v2 : v3 : |
v2 : 3.3
v3 : 6.5 |
08 Feb 2021, 02:15
| Type | Values Removed | Values Added |
|---|---|---|
| Summary | 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. |
07 Feb 2021, 23:15
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2021-02-07 23:15
Updated : 2023-12-10 13:41
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')