Cisco Adaptive Security Appliance Software IKEv2 out-of-bounds write

Summaryinfo

A vulnerability, which was classified as critical, has been found in Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software. This affects an unknown part of the component IKEv2 Handler. This manipulation causes out-of-bounds write. This vulnerability appears as CVE-2025-20182. The attack may be initiated remotely. There is no available exploit. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability has been found in Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software (affected version unknown) and classified as critical. Affected by this vulnerability is an unknown functionality of the component IKEv2 Handler. The manipulation with an unknown input leads to a out-of-bounds write vulnerability. The CWE definition for the vulnerability is CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. As an impact it is known to affect availability. The summary by CVE is:

A vulnerability in the Internet Key Exchange version 2 (IKEv2) protocol processing of Cisco Adaptive Security Appliance (ASA) Software, Cisco Firepower Threat Defense (FTD) Software, Cisco IOS Software, and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to insufficient input validation when processing IKEv2 messages. An attacker could exploit this vulnerability by sending crafted IKEv2 traffic to an affected device. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition on the affected device.

It is possible to read the advisory at sec.cloudapps.cisco.com. This vulnerability is known as CVE-2025-20182 since 10/10/2024. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 08/01/2025).

Upgrading eliminates this vulnerability.

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Productinfo

Type

• Firewall Software

Vendor

• Cisco

Name

• Adaptive Security Appliance Software
• Firepower Threat Defense Software

License

• commercial

Website

• Vendor: https://www.cisco.com/

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