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TI-2021-12983 Aliases CVE-2021-33600GHSA-453r-cx7v-94wr

Denial of Service Vulnerability in Web Interface of F-Secure Internet Gatekeeper

Priority LOW 34CWE-617Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-617.

Summary

A denial-of-service (DoS) vulnerability was discovered in the web user interface of F-Secure Internet Gatekeeper. The vulnerability occurs because of an attacker can trigger assertion via malformed HTTP packet to web interface. An unauthenticated attacker could exploit this vulnerability by sending a large username parameter. A successful exploitation could lead to a denial-of-service of the product.

Why it matters now

EPSS 0.00607 49th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
F-SecureF-Secure Internet Gatekeeper5 Series All Version—No fix listedCNA
  • F-Secure Internet Gatekeeper VendorF-Secure Affected 5 Series All Version Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:f-secure:internet_gatekeeper:*:*:*:*:*:*:*:*5.10 – 5.50.47VulnerableF-Secure
  • cpe:2.3:a:f-secure:internet_gatekeeper:*:*:*:*:*:*:*:* Versions 5.10 – 5.50.47 Vulnerable ·F-Secure

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-33600
  2. 2026-10-03 Alias added: GHSA-453r-cx7v-94wr

References

Advisory 2

  • TI-2004-00203 Multiple stack-based buffer overflows in the get_header function in header.c for LHA… CVSS 2.0HIGH 10.0
  • TI-2007-02873 Multiple F-Secure anti-virus products for Microsoft Windows and Linux before 20070522… CVSS 2.0HIGH 10.0
  • TI-2007-03195 Multiple F-Secure anti-virus products for Microsoft Windows and Linux before 20070619… CVSS 2.0HIGH 9.3
  • TI-2006-02746 Buffer overflow in the web console in F-Secure Anti-Virus for Microsoft Exchange 6.40… CVSS 2.0HIGH 7.6
  • TI-2006-00326 Buffer overflow in multiple F-Secure Anti-Virus products and versions for Windows and… CVSS 2.0HIGH 7.5
  • TI-2007-02872 Buffer overflow in the LHA decompression component in F-Secure anti-virus products for… CVSS 2.0HIGH 7.5
See all 45 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences