Authenticated code execution via buffer size miscalculation
Published Jul 9, 2021 · Updated Oct 25, 2024
Buffer overflow in FortiMail before 6.4.5 allows remote authenticated users with regular webmail access to execute unauthorized code via crafted HTTP requests. The webmail and administrative interfaces miscalculate buffer sizes when copying request data, allowing an oversized value to overwrite adjacent memory. Regular webmail authentication is required, and successful exploitation can compromise confidentiality, integrity, and availability of the appliance.
Summary
What happened
Buffer overflow in FortiMail before 6.4.5 allows remote authenticated users with regular webmail access to execute unauthorized code via crafted HTTP requests. The webmail and administrative interfaces miscalculate buffer sizes when copying request data, allowing an oversized value to overwrite adjacent memory. Regular webmail authentication is required, and successful exploitation can compromise confidentiality, integrity, and availability of the appliance.
The record
- CVE
- CVE-2021-22129
- Published
- Jul 9, 2021
- Updated
- Oct 25, 2024
- Vendor
- Fortinet
- Product
- FortiMail
- Classifications
- CWE-120, T1210
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Jul 9, 2021CVE publishedPublication date reported by the CVE source.
- Oct 25, 2024Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=FortiMail before 6.4.5
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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