CVE-2024-20446 Cisco NX-OS Software DHCPv6 Relay Agent Denial of Service Vulnerability
Remote attackers can crash the DHCPv6 relay agent and force device reloads via crafted packets, causing denial of service on Cisco NX-OS devices.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2024-20446?
CVE-2024-20446 is a high-severity vulnerability in Cisco NX-OS Software, published on 28 Aug 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A vulnerability in the DHCPv6 relay agent of Cisco NX-OS Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to improper handling of specific fields in a DHCPv6 RELAY-REPLY message. An attacker could exploit this vulnerability by sending a crafted DHCPv6 packet to any IPv6 address that is configured on an affected device. A successful exploit could allow the attacker to cause the dhcp_snoop process to crash and restart multiple times, causing the affected device to reload and resulting in a DoS condition.
Weakness: CWE-476
Which versions are affected by CVE-2024-20446?
How do I fix CVE-2024-20446?
No fix has been published for CVE-2024-20446 yet. Limit exposure of the affected software until one is available.
Is CVE-2024-20446 being exploited?
There is no known exploitation of CVE-2024-20446 in the wild and no public exploit code.
Sources
Also known as GHSA-pwqf-cgf8-rx4x.