A vulnerability, which was classified as critical, has been found in Fortinet FortiOS up to 5.4.9/6.0.1 (Firewall Software). Affected by this issue is an unknown part of the component RSA PKCS #1 v1.5. The manipulation with an unknown input leads to a cryptographic issues vulnerability. Using CWE to declare the problem leads to CWE-310. Impacted is confidentiality, integrity, and availability. CVE summarizes:

A plaintext recovery of encrypted messages or a Man-in-the-middle (MiTM) attack on RSA PKCS #1 v1.5 encryption may be possible without knowledge of the server's private key. Fortinet FortiOS 5.4.6 to 5.4.9, 6.0.0 and 6.0.1 are vulnerable by such attack under VIP SSL feature when CPx being used.

The weakness was shared 09/05/2018 as confirmed advisory (CERT.org). The advisory is shared for download at kb.cert.org. This vulnerability is handled as CVE-2018-9194 since 04/02/2018. The attack may be launched remotely. No form of authentication is required for exploitation. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1600.

The commercial vulnerability scanner Qualys is able to test this issue with plugin 43661 (Fortigate FortiOS Information Exposure Through Discrepancy Vulnerability (FG-IR-17-302)).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The entries 110662, 110663 and 123643 are related to this item.

Productinfo

Type

• Firewall Software

Vendor

• Fortinet

Name

• FortiOS

Version

• 5.0.2
• 5.0.3
• 5.0.4
• 5.0.5
• 5.0.6
• 5.0.7
• 5.0.8
• 5.0.9
• 5.2.0
• 5.2.1
• 5.2.2
• 5.2.3
• 5.2.4
• 5.2.5
• 5.2.6
• 5.2.8
• 5.2.9
• 5.2.10
• 5.2.11
• 5.2.12
• 5.4.0
• 5.4.1
• 5.4.2
• 5.4.3
• 5.4.4
• 5.4.5
• 5.4.6
• 5.4.7
• 5.4.8
• 5.4.9
• 6.0.0
• 6.0.1

License

• commercial

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

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