High severity · published Aug 28, 2024
CVE-2024-20446
Cisco NX-OS Software DHCPv6 Relay Agent Denial of Service Vulnerability
8.6
CVSS
0.8%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.8% · higher than 56% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CN
Cisco NX-OS Software · Cisco
10.2(1); 10.2(1q); 9.3(9); 8.2(11) · source: vendor
NX
Nx-os · Cisco
10.2\(1\); 10.2\(1q\); 9.3\(9\); 8.2\(11\) · source: CISA
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2024-20446
CVE.org
https://www.cve.org/CVERecord?id=CVE-2024-20446
sec.cloudapps.cisco.com
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nxos-dhcp6-relay-dos-znEAA6xn
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