NULL pointer dereference in Cisco Nx-Os Software
CVE-2024-20446
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.
EPSS: 0.008 (53.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H.
Affected products
- Cisco Nx-os Software — versions 10.2(1), 10.2(1q), 9.3(9)
Weakness classification (CWE)
Public proof-of-concept exploits
References
Frequently asked questions
- What is CVE-2024-20446?
- CVE-2024-20446 is a high-severity vulnerability in Cisco Nx-Os Software, classified under NULL Pointer Dereference. CVSS score: 8.6/10. Published 2024-08-28.
- How severe is CVE-2024-20446?
- High severity. CVSS v3 base score is 8.6 out of 10.
- Is CVE-2024-20446 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.