Fortinet Issues Patches for 40 Flaws Affecting FortiWeb, FortiOS, FortiNAC, and FortiProxy

Feb 19, 2023

Feb 19, 2023Ravie LakshmananNetwork Security / Firewall

Fortinet has released security updates to address 40 vulnerabilities ^[1] in its software lineup,
including FortiWeb, FortiOS, FortiNAC, and FortiProxy, among
others.

Two of the 40 flaws are rated Critical, 15 are rated High, 22
are rated Medium, and one is rated Low in severity.

Top of the list is a severe bug residing in the FortiNAC network
access control solution (CVE-2022-39952, CVSS score: 9.8) that
could lead to arbitrary code execution.

“An external control of file name or path vulnerability [CWE-73] in FortiNAC web server may allow an unauthenticated attacker to
perform arbitrary write on the system,” Fortinet said ^[2]
in an advisory earlier this week.

The products impacted by the vulnerability are as follows –

FortiNAC version 9.4.0
FortiNAC version 9.2.0 through 9.2.5
FortiNAC version 9.1.0 through 9.1.7
FortiNAC 8.8 all versions
FortiNAC 8.7 all versions
FortiNAC 8.6 all versions
FortiNAC 8.5 all versions, and
FortiNAC 8.3 all versions

Patches have been released in FortiNAC versions 7.2.0, 9.1.8,
9.1.8, and 9.1.8. Penetration testing firm Horizon3.ai said ^[3]
it plans to release a proof-of-concept (PoC) code for the flaw
“soon,” making it imperative that users move quickly to apply the
updates.

The second flaw of note is a set of stack-based buffer overflow
in FortiWeb’s proxy daemon (CVE-2021-42756 ^[4], CVSS score: 9.3) that
could enable an unauthenticated remote attacker to achieve
arbitrary code execution via specifically crafted HTTP
requests.

CVE-2021-42756 affects the below versions of FortiWeb, with
fixes available in versions FortiWeb 6.0.8, 6.1.3, 6.2.7, 6.3.17,
and 7.0.0 –

FortiWeb versions 6.4 all versions
FortiWeb versions 6.3.16 and below
FortiWeb versions 6.2.6 and below
FortiWeb versions 6.1.2 and below
FortiWeb versions 6.0.7 and below, and
FortiWeb versions 5.x all versions

Both the flaws were internally discovered and reported by its
product security team, Fortinet said. Interestingly, CVE-2021-42756
also appears to have been identified in 2021 but not publicly
disclosed until now.

Found this article interesting? Follow us on Twitter ^[5]
and LinkedIn ^[6]
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References

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(www.linkedin.com)

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OWASP TOP !0

Injection. Injection flaws, such as SQL, NoSQL, OS, and LDAP injection, occur when untrusted data is sent to an interpreter as part of a command or query. The attacker’s hostile data can trick the interpreter into executing unintended commands or accessing data without proper authorization. Broken Authentication. Application functions related to authentication and session management are often implemented incorrectly, allowing attackers to compromise passwords, keys, or session tokens, or to exploit other implementation flaws to assume other users’ identities temporarily or permanently. Sensitive Data Exposure. Many web applications and APIs do not properly protect sensitive data, such as financial, healthcare, and PII. Attackers may steal or modify such weakly protected data to conduct credit card fraud, identity theft, or other crimes. Sensitive data may be compromised without extra protection, such as encryption at rest or in transit, and requires special precautions when exchanged with the browser. XML External Entities (XXE). Many older or poorly configured XML processors evaluate external entity references within XML documents. External entities can be used to disclose internal files using the file URI handler, internal file shares, internal port scanning, remote code execution, and denial of service attacks. Broken Access Control. Restrictions on what authenticated users are allowed to do are often not properly enforced. Attackers can exploit these flaws to access unauthorized functionality and/or data, such as access other users’ accounts, view sensitive files, modify other users’ data, change access rights, etc. Security Misconfiguration. Security misconfiguration is the most commonly seen issue. This is commonly a result of insecure default configurations, incomplete or ad hoc configurations, open cloud storage, misconfigured HTTP headers, and verbose error messages containing sensitive information. Not only must all operating systems, frameworks, libraries, and applications be securely configured, but they must be patched/upgraded in a timely fashion. Cross-Site Scripting XSS. XSS flaws occur whenever an application includes untrusted data in a new web page without proper validation or escaping, or updates an existing web page with user-supplied data using a browser API that can create HTML or JavaScript. XSS allows attackers to execute scripts in the victim’s browser which can hijack user sessions, deface web sites, or redirect the user to malicious sites. Insecure Deserialization. Insecure deserialization often leads to remote code execution. Even if deserialization flaws do not result in remote code execution, they can be used to perform attacks, including replay attacks, injection attacks, and privilege escalation attacks. Using Components with Known Vulnerabilities. Components, such as libraries, frameworks, and other software modules, run with the same privileges as the application. If a vulnerable component is exploited, such an attack can facilitate serious data loss or server takeover. Applications and APIs using components with known vulnerabilities may undermine application defenses and enable various attacks and impacts. Insufficient Logging & Monitoring. Insufficient logging and monitoring, coupled with missing or ineffective integration with incident response, allows attackers to further attack systems, maintain persistence, pivot to more systems, and tamper, extract, or destroy data. Most breach studies show time to detect a breach is over 200 days, typically detected by external parties rather than internal processes or monitoring.

Fortinet Issues Patches for 40 Flaws Affecting FortiWeb, FortiOS, FortiNAC, and FortiProxy

References

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