CVE-2002-1623

CVE-2002-1623 is a medium-severity vulnerability in Checkpoint Vpn-1 Firewall-1 with a CVSS 2.0 base score of 5.0. Its EPSS exploit-prediction score of 49% places it in the 99th percentile, indicating an elevated likelihood of exploitation.

Key facts

Description

The design of the Internet Key Exchange (IKE) protocol, when using Aggressive Mode for shared secret authentication, does not encrypt initiator or responder identities during negotiation, which may allow remote attackers to determine valid usernames by (1) monitoring responses before the password is supplied or (2) sniffing, as originally reported for FireWall-1 SecuRemote.

Frequently asked questions

What is CVE-2002-1623?
The design of the Internet Key Exchange (IKE) protocol, when using Aggressive Mode for shared secret authentication, does not encrypt initiator or responder identities during negotiation, which may allow remote attackers to determine valid usernames by (1) monitoring responses before the password is supplied or (2) sniffing, as originally reported for FireWall-1 SecuRemote.
How severe is CVE-2002-1623?
CVE-2002-1623 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2002-1623 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 49% (99th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2002-1623?
CVE-2002-1623 primarily affects Checkpoint Vpn-1 Firewall-1. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2002-1623?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2002-1623 published?
CVE-2002-1623 was published on 2002-12-31 and last updated on 2026-06-16.

References

Affected products (2)

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