Cisco IOS XE up to 17.12.1w IPv4 DHCP Request Packet heap-based overflow

Summaryinfo

A vulnerability described as critical has been identified in Cisco IOS XE. Affected is an unknown function of the component IPv4 DHCP Request Packet Handler. The manipulation results in heap-based overflow. This vulnerability is reported as CVE-2024-20259. The attack can be launched remotely. No exploit exists. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability, which was classified as critical, was found in Cisco IOS XE. Affected is an unknown code block of the component IPv4 DHCP Request Packet Handler. The manipulation with an unknown input leads to a heap-based overflow vulnerability. CWE is classifying the issue as CWE-122. A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc(). This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

A vulnerability in the DHCP snooping feature of Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause an affected device to reload unexpectedly, resulting in a denial of service (DoS) condition. This vulnerability is due to a crafted IPv4 DHCP request packet being mishandled when endpoint analytics are enabled. An attacker could exploit this vulnerability by sending a crafted DHCP request through an affected device. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition. Note: The attack vector is listed as network because a DHCP relay anywhere on the network could allow exploits from networks other than the adjacent one.

The advisory is shared for download at sec.cloudapps.cisco.com. This vulnerability is traded as CVE-2024-20259 since 11/08/2023. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $5k-$25k (estimation calculated on 03/27/2024).

Upgrading eliminates this vulnerability.

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Productinfo

Type

• Router Operating System

Vendor

• Cisco

Name

• IOS XE

Version

• 17.1.1
• 17.1.1a
• 17.1.1s
• 17.1.1t
• 17.1.3
• 17.2.1
• 17.2.1a
• 17.2.1r
• 17.2.1v
• 17.2.2
• 17.2.3
• 17.3.1
• 17.3.1a
• 17.3.1w
• 17.3.1x
• 17.3.1z
• 17.3.2
• 17.3.2a
• 17.3.3
• 17.3.4
• 17.3.4a
• 17.3.4b
• 17.3.4c
• 17.3.5
• 17.3.5a
• 17.3.5b
• 17.3.6
• 17.3.7
• 17.3.8
• 17.3.8a
• 17.4.1
• 17.4.1a
• 17.4.1b
• 17.4.2
• 17.4.2a
• 17.5.1
• 17.5.1a
• 17.6.1
• 17.6.1a
• 17.6.1w
• 17.6.1x
• 17.6.1y
• 17.6.1z
• 17.6.1z1
• 17.6.2
• 17.6.3
• 17.6.3a
• 17.6.4
• 17.6.5
• 17.6.5a
• 17.6.6
• 17.6.6a
• 17.7.1
• 17.7.1a
• 17.7.1b
• 17.7.2
• 17.8.1
• 17.8.1a
• 17.9.1
• 17.9.1a
• 17.9.1w
• 17.9.1x
• 17.9.1x1
• 17.9.1y
• 17.9.1y1
• 17.9.2
• 17.9.2a
• 17.9.3
• 17.9.3a
• 17.9.4
• 17.9.4a
• 17.10.1
• 17.10.1a
• 17.10.1b
• 17.11.1
• 17.11.1a
• 17.11.99SW
• 17.12.1
• 17.12.1a
• 17.12.1w

License

• commercial

Website

• Vendor: https://www.cisco.com/

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