CCE-92883-8Platform: cpe:/o:ubuntu:ubuntu_linux:19.04 | Date: (C)2019-11-07 (M)2023-07-04 |
Disable IPv6 Router Advertisements
This setting disables the systems ability to accept router advertisements
Parameter:
[no/yes]
Technical Mechanism:
It is recommended that systems not accept router advertisements as they could be tricked into routing traffic to compromised machines. Setting hard routes within the system (usually a single default route to a trusted router) protects the system from bad routes.
Fix:
Set the net.ipv6.conf.all.accept_ra and net.ipv6.conf.default.accept_ra parameter to 0 in /etc/sysctl.conf:
net.ipv6.conf.all.accept_ra=0 net.ipv6.conf.default.accept_ra=0
Modify active kernel parameters to match:
# /sbin/sysctl -w net.ipv6.conf.all.accept_ra=0
# /sbin/sysctl -w net.ipv6.conf.default.accept_ra=0
# /sbin/sysctl -w net.ipv6.route.flush=1
CCSS Severity: | CCSS Metrics: |
CCSS Score : 5.1 | Attack Vector: LOCAL |
Exploit Score: 2.5 | Attack Complexity: LOW |
Impact Score: 2.5 | Privileges Required: NONE |
Severity: MEDIUM | User Interaction: NONE |
Vector: AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L | Scope: UNCHANGED |
| Confidentiality: LOW |
| Integrity: NONE |
| Availability: LOW |
| |
References: Resource Id | Reference |
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SCAP Repo OVAL Definition | oval:org.secpod.oval:def:55096 |