KnowBe4 Phish Alert Button for Outlook certificate validation

Summaryinfo

A vulnerability, which was classified as critical, has been found in KnowBe4 Phish Alert Button for Outlook, Second Chance Client and PasswordIQ Client. Affected is an unknown function. This manipulation causes certificate validation. This vulnerability appears as CVE-2024-29209. The attack may be initiated remotely. There is no available exploit. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in KnowBe4 Phish Alert Button for Outlook, Second Chance Client and PasswordIQ Client (affected version unknown). It has been declared as critical. Affected by this vulnerability is an unknown functionality. The manipulation with an unknown input leads to a certificate validation vulnerability. The CWE definition for the vulnerability is CWE-295. The product does not validate, or incorrectly validates, a certificate. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

A medium severity vulnerability has been identified in the update mechanism of the Phish Alert Button for Outlook, which could allow an attacker to remotely execute arbitrary code on the host machine. The vulnerability arises from the application's failure to securely verify the authenticity and integrity of the update server. The application periodically checks for updates by querying a specific URL. However, this process does not enforce strict SSL/TLS verification, nor does it validate the digital signature of the received update files. An attacker with the capability to perform DNS spoofing can exploit this weakness. By manipulating DNS responses, the attacker can redirect the application's update requests to a malicious server under their control. Once the application queries the spoofed update URL, the malicious server can respond with a crafted update package. Since the application fails to properly verify the authenticity of the update file, it will accept and execute the package, leading to arbitrary code execution on the host machine. Impact: Successful exploitation of this vulnerability allows an attacker to execute code with elevated privileges, potentially leading to data theft, installation of further malware, or other malicious activities on the host system. Affected Products: Phish Alert Button (PAB) for Outlook versions 1.10.0-1.10.11 Second Chance Client versions 2.0.0-2.0.9 PIQ Client versions 1.0.0-1.0.15 Remediation: Automated updates will be pushed to address this issue. Users of affected versions should verify the latest version is applied and, if not, apply the latest updates provided by KnowBe4, which addresses this vulnerability by implementing proper SSL/TLS checks of the update server. It is also recommended to ensure DNS settings are secure to prevent DNS spoofing attacks. Workarounds: Use secure corporate networks or VPN services to secure network communications, which can help mitigate the risk of DNS spoofing. Credits: This vulnerability was discovered by Ceri Coburn at Pen Test Partners, who reported it responsibly to the vendor.

It is possible to read the advisory at support.knowbe4.com. This vulnerability is known as CVE-2024-29209 since 03/19/2024. The exploitation appears to be difficult. The attack can be launched remotely. The exploitation doesn't need any form of authentication. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1587.003 according to MITRE ATT&CK.

Upgrading eliminates this vulnerability.

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Productinfo

Vendor

• KnowBe4

Name

• PasswordIQ Client
• Phish Alert Button for Outlook
• Second Chance Client

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