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CVE-2023-42789

Fortinet FortiOS buffer overflow

9.8 CRITICALEPSS 3.31%
  1. Published12 Mar 2024

Description

A out-of-bounds write vulnerability in Fortinet FortiOS 7.4.0 through 7.4.1, FortiOS 7.2.0 through 7.2.5, FortiOS 7.0.0 through 7.0.12, FortiOS 6.4.0 through 6.4.14, FortiOS 6.2.0 through 6.2.15, FortiProxy 7.4.0, FortiProxy 7.2.0 through 7.2.6, FortiProxy 7.0.0 through 7.0.12, FortiProxy 2.0.0 through 2.0.13, FortiSASE 23.2.b allows attacker to execute unauthorized code or commands via specially crafted HTTP requests.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Fortinet FortiProxy≥ 2.0.0 ≤ 2.0.13 · ≥ 7.0.0 ≤ 7.0.12 · ≥ 7.2.0 ≤ 7.2.6 · 7.4.0
Fortinet FortiOS≥ 6.2.0 ≤ 6.2.15 · ≥ 6.4.0 ≤ 6.4.14 · ≥ 7.0.0 ≤ 7.0.12 · ≥ 7.2.0 ≤ 7.2.5

Remediation

No fixed version is recorded in the NVD data. Check the vendor advisory for the latest guidance.

References

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Frequently asked

Is CVE-2023-42789 being actively exploited?

CVE-2023-42789 is not in the CISA KEV catalog. Its EPSS exploit probability is 3.31%.

How severe is CVE-2023-42789?

CVE-2023-42789 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 3.31% probability of exploitation.

Which products are affected by CVE-2023-42789?

Affected products include Fortinet FortiProxy, Fortinet FortiOS.

How do I fix CVE-2023-42789?

Apply the vendor's patch or advisory guidance, then verify no affected versions remain across your devices.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2023-42789 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.