CVE-2023-27997 (GCVE-0-2023-27997)

Vulnerability from cvelistv5 – Published: 2023-06-13 08:41 – Updated: 2025-10-21 23:05
VLAI? CISA KEV EUVD KEV
Summary
A heap-based buffer overflow vulnerability [CWE-122] in FortiOS version 7.2.4 and below, version 7.0.11 and below, version 6.4.12 and below, version 6.0.16 and below and FortiProxy version 7.2.3 and below, version 7.0.9 and below, version 2.0.12 and below, version 1.2 all versions, version 1.1 all versions SSL-VPN may allow a remote attacker to execute arbitrary code or commands via specifically crafted requests.
CWE
  • CWE-122 - Execute unauthorized code or commands
Assigner
Impacted products
Vendor Product Version
Fortinet FortiOS-6K7K Affected: 7.0.10
Affected: 7.0.5
Affected: 6.4.12
Affected: 6.4.10
Affected: 6.4.8
Affected: 6.4.6
Affected: 6.4.2
Affected: 6.2.9 , ≤ 6.2.13 (semver)
Affected: 6.2.6 , ≤ 6.2.7 (semver)
Affected: 6.2.4
Affected: 6.0.12 , ≤ 6.0.16 (semver)
Affected: 6.0.10
Create a notification for this product.
    Fortinet FortiProxy Affected: 7.2.0 , ≤ 7.2.3 (semver)
Affected: 7.0.0 , ≤ 7.0.9 (semver)
Affected: 2.0.0 , ≤ 2.0.12 (semver)
Affected: 1.2.0 , ≤ 1.2.13 (semver)
Affected: 1.1.0 , ≤ 1.1.6 (semver)
Create a notification for this product.
    Fortinet FortiOS Affected: 7.2.0 , ≤ 7.2.4 (semver)
Affected: 7.0.0 , ≤ 7.0.11 (semver)
Affected: 6.4.0 , ≤ 6.4.12 (semver)
Affected: 6.2.0 , ≤ 6.2.13 (semver)
Affected: 6.0.0 , ≤ 6.0.16 (semver)
Create a notification for this product.
CISA KEV
Known Exploited Vulnerability - GCVE BCP-07 Compliant

Vulnerability ID: CVE-2023-27997

Status: Confirmed

Status Updated: 2023-06-13 00:00 UTC

Exploited: Yes


Timestamps
First Seen: 2023-06-13
Asserted: 2023-06-13

Scope
Notes: KEV entry: Fortinet FortiOS and FortiProxy SSL-VPN Heap-Based Buffer Overflow Vulnerability | Affected: Fortinet / FortiOS and FortiProxy SSL-VPN | Description: Fortinet FortiOS and FortiProxy SSL-VPN contain a heap-based buffer overflow vulnerability which can allow an unauthenticated, remote attacker to execute code or commands via specifically crafted requests. | Required action: Apply updates per vendor instructions. | Due date: 2023-07-04 | Known ransomware campaign use (KEV): Known | Notes (KEV): https://www.fortiguard.com/psirt/FG-IR-23-097; https://nvd.nist.gov/vuln/detail/CVE-2023-27997

Evidence

Type: Vendor Report

Signal: Successful Exploitation

Confidence: 80%

Source: cisa-kev


Details
Cwes CWE-122
Feed CISA Known Exploited Vulnerabilities Catalog
Product FortiOS and FortiProxy SSL-VPN
Due Date 2023-07-04
Date Added 2023-06-13
Vendorproject Fortinet
Vulnerabilityname Fortinet FortiOS and FortiProxy SSL-VPN Heap-Based Buffer Overflow Vulnerability
Knownransomwarecampaignuse Known

References

Created: 2026-02-02 12:26 UTC | Updated: 2026-02-06 07:17 UTC
EUVD KEV
Known Exploited Vulnerability - GCVE BCP-07 Compliant

Vulnerability ID: CVE-2023-27997

Status: Confirmed

Status Updated: 2025-01-23 00:00 UTC

Exploited: Yes


Timestamps
First Seen: 2025-01-23
Asserted: 2025-01-23

Scope
Notes: Affected: Fortinet / FortiOS and FortiProxy | Exploitation type: ransomware | Origin source: cnw

Evidence

Type: Csirt Report

Signal: Confirmed Compromise

Confidence: 75%

Source: enisa-cnw-kev


Details
Cwes -
Euvd EUVD-2023-31722
Notes -
Catalog ENISA / EU CSIRTs Network (CNW) KEV CSV
Product FortiOS and FortiProxy
Datereported 23/01/25
Originsource cnw
Vendorproject Fortinet
Exploitationtype ransomware
Vulnerabilityname -
Threatactorsexploiting -

References

Created: 2026-02-02 12:25 UTC | Updated: 2026-02-06 07:17 UTC
Show details on NVD website

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    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://fortiguard.com/psirt/FG-IR-23-097\", \"name\": \"https://fortiguard.com/psirt/FG-IR-23-097\", \"tags\": [\"x_transferred\"]}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-02T12:23:30.864Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2023-27997\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"active\"}, {\"Automatable\": \"yes\"}, {\"Technical Impact\": \"total\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-10-23T13:18:08.089433Z\"}}}, {\"other\": {\"type\": \"kev\", \"content\": {\"dateAdded\": \"2023-06-13\", \"reference\": \"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-27997\"}}}], \"timeline\": [{\"lang\": \"en\", \"time\": \"2023-06-13T00:00:00+00:00\", 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\"https://fortiguard.com/psirt/FG-IR-23-097\"}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"A heap-based buffer overflow vulnerability [CWE-122] in FortiOS version 7.2.4 and below, version 7.0.11 and below, version 6.4.12 and below, version 6.0.16 and below and FortiProxy version 7.2.3 and below, version 7.0.9 and below, version 2.0.12 and below, version 1.2 all versions, version 1.1 all versions SSL-VPN may allow a remote attacker to execute arbitrary code or commands via specifically crafted requests.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-122\", \"description\": \"Execute unauthorized code or commands\"}]}], \"providerMetadata\": {\"orgId\": \"6abe59d8-c742-4dff-8ce8-9b0ca1073da8\", \"shortName\": \"fortinet\", \"dateUpdated\": \"2023-06-13T08:41:47.415Z\"}}}",
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      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


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Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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Detection rules are retrieved from Rulezet.

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