PT-2021-4730 · F Secure · F-Secure Internet Gatekeeper

Published 2021-09-28 · Updated 2021-10-08 · CVE-2021-33600

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions F-Secure Internet Gatekeeper (affected versions not specified)

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

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

RCE

Assertion Failure

Weakness Enumeration

CWE-20

CWE-617

Related Identifiers

BDU:2021-05436

CVE-2021-33600

Affected Products

F-Secure Internet Gatekeeper

References · 9

• https://osv.dev/vulnerability/CVE-2021-33600 · Vendor Advisory
• https://f-secure.com/en/business/support-and-downloads/security-advisories/cve-2021-33600 · Vendor Advisory
• https://f-secure.com/en/business/programs/vulnerability-reward-program/hall-of-fame · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-33600 · Security Note
• https://bdu.fstec.ru/vul/2021-05436 · Security Note
• https://t.me/cibsecurity/29539 · Telegram Post
• https://cybersecurity-help.cz/vdb/SB2021092906 · Note
• https://t.me/cvenotify/22153 · Telegram Post
• https://t.me/cvenotify/21560 · Telegram Post