Raw vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HCVSS and EPSS are reproduced from their sources (NVD, FIRST EPSS). Risk Priority is our own derived reading, not an NVD score.
Summary
CVE-2023-33308 is a critical-severity Stack-based Buffer Overflow (CWE-121) vulnerability in Fortinet Fortiproxy. Its CVSS base score is 9.8 (Critical).
Operationally, exploitation aligns with the MITRE ATT&CK technique Security Account Manager (T1003.002); ranked in the top 18% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
Deeper analysis AI-assisted summary
Synthesised by an AI model from the NVD description and linked references — a reading aid, not an authoritative source.
A stack-based buffer overflow vulnerability exists in Fortinet FortiOS versions 7.0.0 through 7.0.10 and 7.2.0 through 7.2.3, as well as FortiProxy versions 7.0.0 through 7.0.9 and 7.2.0 through 7.2.2. The flaw, tracked under CWE-121 and CWE-787, is triggered when specially crafted packets reach proxy policies or firewall policies configured for proxy mode with deep or full packet inspection enabled.
An unauthenticated remote attacker can send malicious packets over the network to exploit the issue, achieving arbitrary code or command execution with no user interaction required. The vulnerability carries a CVSS v3.1 score of 9.8, reflecting its critical severity due to network accessibility and full impact on confidentiality, integrity, and availability.
The vendor advisory FG-IR-23-183, published on the FortiGuard PSIRT site, provides official details and should be consulted for mitigation steps such as applying available patches or configuration changes. The associated EPSS score has remained stable at 0.0760 with no observed increase following disclosure.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2023-37471
Vulnerability Data
A stack-based overflow vulnerability [CWE-124] in Fortinet FortiOS version 7.0.0 through 7.0.10 and 7.2.0 through 7.2.3 and FortiProxy version 7.0.0 through 7.0.9 and 7.2.0 through 7.2.2 allows a remote unauthenticated attacker to execute arbitrary code or command via crafted packets…
more
reaching proxy policies or firewall policies with proxy mode alongside deep or full packet inspection.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise Techniques
CVEs Like This One
Affected Assets
Mitigating Controls
Control response
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- 2 hardening rules · 2 OS baselines
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Likely Mitigating Controls AI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Out-of-bounds writes that corrupt control flow or inject shellcode are rendered non-executable by the same memory protections.
Mitigating Controls (NIST CSF 2.0) AI
Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.
Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI
Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.
Hardening callouts derived
Configuration rules from DISA STIG baselines that bear on weaknesses of the type cited by this CVE. Each rule is shown with the relationship its mapping actually records, against the CWE it was authored against. Derived via CVE→CWE over `controls_xwalks` (higher-evidence rows only; rows rated `none` are excluded).
Oracle Linux 8 (1 rule)
- V-248594 OL 8 must implement address space layout randomization (ASLR) to protect its memory from unauthorized code execution. blocks CWE-121
Oracle Linux 9 (1 rule)
- V-271452 OL 9 must use a Linux Security Module configured to enforce limits on system services. blocks CWE-121