Known exploited vulnerability
CVE-2023-27997
The short answer
CVE-2023-27997 affects Fortinet FortiOS-6K7K and is rated critical (CVSS 9.8). CISA added it to the Known Exploited Vulnerabilities catalog on 2023-06-13: attackers are using it, so patch it first.
What it is
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.
Severity
9.8 critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Exploited (CISA KEV)
Yes, since Jun 13, 2023
Federal due date Jul 4, 2023
EPSS, next 30 days
87%
Higher than 100% of scored CVEs
How it can be exploited
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
What CISA says to do
Apply updates per vendor instructions.
Affected products
FortiOS-6K7K, FortiProxy, FortiOS. NVD's record lists the exact affected versions.
References
- fortiguard.com/psirt/FG-IR-23-097 Vendor Advisory
- fortiguard.com/psirt/FG-IR-23-097 Vendor Advisory
- www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-27997 US Government Resource
Questions
Is CVE-2023-27997 being exploited?
Yes. CISA added CVE-2023-27997 to its Known Exploited Vulnerabilities catalog on 2023-06-13, with a federal remediation due date of 2023-07-04. CISA lists it as used in ransomware campaigns.
How do I fix CVE-2023-27997?
CISA's required action: Apply updates per vendor instructions.
From NVD, CISA KEV, FIRST EPSS and OSV.dev, checked . Status on NVD: Analyzed. The description is NVD's text, quoted as published.
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