CVE-2021-22161
Published Feb 7, 2021
Last updated a year ago
Overview
- 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.
- Source
- cve@mitre.org
- NVD status
- Analyzed
Social media
- Hype score
- Not currently trending
Risk scores
CVSS 3.1
- Type
- Primary
- Base score
- 6.5
- Impact score
- 3.6
- Exploitability score
- 2.8
- Vector string
- CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Severity
- MEDIUM
CVSS 2.0
- Type
- Primary
- Base score
- 3.3
- Impact score
- 2.9
- Exploitability score
- 6.5
- Vector string
- AV:A/AC:L/Au:N/C:N/I:N/A:P
Weaknesses
- nvd@nist.gov
- CWE-835
Configurations
[
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:openwrt:openwrt:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "B9B137F0-E0CB-426E-AB76-3B1FC53097DE",
"versionEndIncluding": "19.07.6",
"versionStartIncluding": "19.07.0"
}
],
"operator": "OR"
}
]
}
]