CVE-2009-3976Proftp Memory Corruption
Buffer overflow in Labtam ProFTP 2.9 allows remote FTP servers to cause a denial of service (application crash) or execute arbitrary code via a long 220 reply (aka connection greeting or welcome message).
Published Nov 18, 2009 · Updated Apr 22, 2026
Key Facts
Patch immediately- CVE-2009-3976 is a critical-severity vulnerability (CVSS 9.3 v2) affecting Proftp (Labtam-Inc).
- It is not listed in any known-exploited vulnerabilities catalog. Public exploit code is available.
- EPSS estimates a 28% probability of exploitation in the next 30 days.
- No fixed version is listed yet; check the vendor advisory for mitigations.
- Brandefense priority: patch immediately, because public exploit code exists for a high-severity flaw.
Scores
CVSS v2
9.3
AV:N/AC:M/Au:N/C:C/I:C/A:C
EPSS (30-day exploit likelihood)
28%
Higher than 98.1% of all scored CVEs
Exploit maturity
Weaponized
ATLAS score
56/100
Publication score, see How it works
Exploitation Verdict
KEV listed
Not listed
Federal due date
None
No federal due date
Ransomware use
Not reported
Attributed actors
None named
Exploit & Defence Guidance
Exploit maturity
Weaponized
Public exploit code
3
Proof-of-concept links
In-the-wild evidence
1
Reports of active use
Advisories And Exploit References
- advisoryADV-2009-2414
Description
Buffer overflow in Labtam ProFTP 2.9 allows remote FTP servers to cause a denial of service (application crash) or execute arbitrary code via a long 220 reply (aka connection greeting or welcome message).
Affected Products
1 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| ProftpLabtam-Inc | 2.9 | n/a |
Timeline
Publicly disclosed
Nov 18, 2009
Last updated
Apr 22, 2026
Weakness Type
- CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
References
- advisoryADV-2009-2414
- exploitMSF proftp_banner.rb
- exploitExploitDB-16709
- exploitExploitDB-9508
- exploit36128
FAQ
Common Questions.
Buffer overflow in Labtam ProFTP 2.9 allows remote FTP servers to cause a denial of service (application crash) or execute arbitrary code via a long 220 reply (aka connection greeting or welcome message).
Affected: Proftp (Labtam-Inc) versions 2.9. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
No fixed version is listed yet; check the vendor advisory for mitigations.
Brandefense priority: patch immediately, because public exploit code exists for a high-severity flaw.
Is CVE-2009-3976 On Your Attack Surface?
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