Vulnerability Details

Internet Key Exchange (IKE) Aggressive Mode Information Disclosure Vulnerability (CVE-2002-1623)

Published: 2021-07-23 09:03:46
CVE Author: NIST National Vulnerability Database

CVSS Base Vector:
AV:N/AC:L/Au:N/C:P/I:N/A:N

Summary:
Internet Key Exchange (IKE) protocol enabled services running in / supporting the aggressive mode are prone to an information disclosure vulnerability.

Detection Method:
Sends IKE aggressive mode connection requests with Pre-Shared Key (PSK) authentication enabled and checks the response.

Technical Details:
The design of the IKE protocol, when using Aggressive Mode for shared secret authentication (PSK), does not encrypt initiator or responder identities during negotiation. Please see the references for more technical / background info.

Impact:
The flaw may allow remote attackers to determine valid usernames by monitoring responses before the password is supplied or sniffing.

Affected Versions:
Internet Key Exchange (IKE) protocol enabled services running in / supporting the aggressive mode with Pre-Shared Key (PSK) authentication enabled might be affected.

Recommendations:
Use an alternative mode and authentication method. The IKE protocol provides many options for both connection mode and authentication method, several combinations provide identity protection. For example, both Main Mode with shared secret authentication and Aggressive Mode with public key authentication provide identity protection.

Detection Type:
Remote Banner

Solution Type:
Mitigation

NIST (National Institute of Standards and Technology) NVD (National Vulnerability Database)

https://nvd.nist.gov/vuln/detail/CVE-2002-1623

References:

https://www.kb.cert.org/vuls/id/886601
https://web.archive.org/web/20120203011907/http://www.nta-monitor.com/posts/2003/01/checkpoint-main.html
https://marc.info/?l=bugtraq&m=103124812629621&w=2
https://marc.info/?l=bugtraq&m=103176164729351&w=2
https://www.securityfocus.com/bid/7423

Severity
Medium
CVSS Score
5.0
Published
2021-07-23
Modified
2021-09-03
Category
General

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