Information disclosure in Cisco Systems, Inc products - CVE-2016-6415

Vulnerability details

The vulnerability allows a remote user to access potentially sensitive information on the target system.

The weakness exists due to insufficient checks of IKE packats when handling ISAKMP requests. By sending specially crafted IKEv1 packets  to the IKE service via IPv4 or IPv6 a malicious user can obtain memory contents.

Successful exploitation of the vulnerability leads to confidential information disclosure on the vulnerable system.

Note: this vulnerability was being actively exploited in the wild. It was disclosed as part of Equation Group Leak and is reffered as BENIGNCERTAIN exploit.

Affected software

How to mitigate CVE-2016-6415

Links to Public Exploits and PoC-codes

• Exploit #6329 - Cisco IOS 12.2 < 12.4 / 15.0 < 15.6 - Security Association Negotiation Request Device Memory (June 17, 2021)
• Exploit #8 - Cisco IKE Information Disclosure (March 18, 2020)
• Exploit #105 - labs (Vulnerability Labs for security analysis) (March 18, 2020)

External References

• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160916-ikev1

Related Security Bulletins

• Information disclosure when handling IKEv1 packets in Cisco products