High severity · published Sep 28, 2021
CVE-2021-33600
A denial-of-service (DoS) vulnerability was discovered in the web user interface of F-Secure Internet Gatekeeper
7.5
CVSS
0.6%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 49% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
IG
Internet Gatekeeper · F-secure
5.10 through 5.50.47 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-33600
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-33600
Vendor Advisory
https://www.f-secure.com/en/business/programs/vulnerability-reward-program/hall-of-fame
Vendor Advisory
https://www.f-secure.com/en/business/support-and-downloads/security-advisories/cve-2021-33600
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