CVE-2021-43074 Weak cryptography in FortiOS

What is CVE-2021-43074?

CVE-2021-43074 is a medium-severity vulnerability in Fortinet Fortios, published on 16 Feb 2023. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

An improper verification of cryptographic signature vulnerability [CWE-347] in 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 may allow an attacker to decrypt portions of the administrative session management cookie if able to intercept the latter.

Weakness: CWE-347

Which versions are affected by CVE-2021-43074?

It affects 4 products.

Products include Fortinet Fortios, Fortinet Fortiproxy, Fortinet Fortiswitch, Fortinet Fortiweb.

How do I fix CVE-2021-43074?

No fix has been published for CVE-2021-43074 yet. Limit exposure of the affected software until one is available.

Is CVE-2021-43074 being exploited?

There is no known exploitation of CVE-2021-43074 in the wild and no public exploit code.

Other vulnerabilities in Fortinet Fortios

• CVE-2024-23113 Fortinet Multiple Products Format String Exploited Critical 9.8
• CVE-2022-40684 Fortinet Multiple Products Authentication Bypass Exploited Critical 9.8
• CVE-2024-55591 Fortinet FortiOS and FortiProxy Authentication Bypass Exploited Critical 9.6
• CVE-2024-21762 Fortinet FortiOS Out-of-Bound Write Exploited Critical 9.6
• CVE-2022-42475 Fortinet FortiOS Heap-Based Buffer Overflow Exploited Critical 9.3

All Fortinet Fortios vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-wcqx-g82p-992c.