CVE-2021-43074 : Exploit Details and Defense Strategies

CVE-2021-43074 is an improper verification of cryptographic signature vulnerability affecting multiple Fortinet products. An attacker could potentially decrypt portions of the administrative session management cookie.

Understanding CVE-2021-43074

This CVE involves an improper verification of cryptographic signature vulnerability across various Fortinet products, potentially leading to information disclosure.

What is CVE-2021-43074?

This vulnerability may allow attackers to decrypt parts of the administrative session management cookie if they can intercept it. It affects several Fortinet products, including FortiWeb, FortiOS, FortiSwitch, and FortiProxy.

The Impact of CVE-2021-43074

The vulnerability could result in the decryption of sensitive information from the administrative session management cookie, potentially leading to unauthorized access and information disclosure.

Technical Details of CVE-2021-43074

This section provides technical details about the vulnerability.

Vulnerability Description

An improper verification of cryptographic signature vulnerability exists in multiple versions of FortiWeb, FortiOS, FortiSwitch, and FortiProxy, allowing potential decryption of the administrative session management cookie.

Affected Systems and Versions

FortiWeb: 6.4 all versions, 6.3.16 and below, 6.2 all versions, 6.1 all versions, 6.0 all versions
FortiOS: 7.0.3 and below, 6.4.8 and below, 6.2 all versions, 6.0 all versions
FortiSwitch: 7.0.3 and below, 6.4.10 and below, 6.2 all versions, 6.0 all versions
FortiProxy: 7.0.1 and below, 2.0.7 and below, 1.2 all versions, 1.1 all versions, 1.0 all versions

Exploitation Mechanism

The vulnerability could be exploited by intercepting the administrative session management cookie to decrypt sensitive information.

Mitigation and Prevention

Protect systems from CVE-2021-43074 through these measures.

Immediate Steps to Take

Upgrade to the recommended versions of affected products provided below.

Long-Term Security Practices

Regularly update and patch Fortinet products to the latest secure versions.

Patching and Updates

FortiOS: Upgrade to version 7.0.7 or above, 6.4.9 or above
FortiWeb: Upgrade to version 7.0.0 or above, 6.3.17 or above
FortiProxy: Upgrade to version 7.0.7 or above, 2.0.8 or above
FortiSwitch: Upgrade to version 7.2.0 or above, 7.0.4 or above, 6.4.11 or above.