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Vulnerability CVE-2021-22161
Published: 2021-02-07 Modified: 2021-02-08
| Description: |
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. |
Type:
CWE-835 (Loop with Unreachable Exit Condition ('Infinite Loop'))
CVSS2 => (AV:A/AC:L/Au:N/C:N/I:N/A:P)
| CVSS Base Score |
Impact Subscore |
Exploitability Subscore |
3.3/10 |
2.9/10 |
6.5/10 |
| Exploit range |
Attack complexity |
Authentication |
Adjacent network |
Low |
No required |
| Confidentiality impact |
Integrity impact |
Availability impact |
None |
None |
Partial |
References: |
https://openwrt.org/advisory/2021-02-02-1
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