PT-2024-5806 · Cisco · Cisco Nx-Os+1

Published 2024-08-28 · Updated 2024-08-31 · CVE-2024-20446

Positive Technologies (AI Summary)

CVSS v3.1

8.6

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions Cisco NX-OS Software (affected versions not specified)

Description A vulnerability in the DHCPv6 relay agent could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This is due to improper handling of specific fields in a DHCPv6 RELAY-REPLY message. An attacker could exploit this by sending a crafted DHCPv6 packet to any IPv6 address configured on an affected device, potentially causing the dhcp snoop process to crash and restart multiple times, leading to a DoS condition.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

DoS

NULL Pointer Dereference

Weakness Enumeration

CWE-476

Related Identifiers

BDU:2024-06551

CVE-2024-20446

Affected Products

Cisco Nx-Os

Cisco Nexus

References · 10

• https://bdu.fstec.ru/vul/2024-06551 · Security Note
• https://safe-surf.ru/specialists/bulletins-nkcki/711987 · Security Note
• https://safe-surf.ru/specialists/bulletins-nkcki/711317 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2024-20446 · Security Note
• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nxos-dhcp6-relay-dos-znEAA6xn · Vendor Advisory
• https://t.me/cvenotify/92528 · Telegram Post
• https://twitter.com/cracbot/status/1830123568669344244 · Twitter Post
• https://twitter.com/CVEnew/status/1828836201131897222 · Twitter Post
• https://t.me/cvedetector/4343 · Telegram Post
• https://twitter.com/CveFindCom/status/1828840502319268290 · Twitter Post