Heap-Based Buffer Overflow in bftpd Configuration File Handler
CVE-2025-11947

2LOW

Key Information:

Vendor

bftpd

Status
Bftpd
Vendor
CVE Published:
19 October 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-11947?

A critical vulnerability has been identified in the bftpd FTP Server software, specifically within the expand_groups function of the options.c file. This flaw can lead to a heap-based buffer overflow, providing an opportunity for local attackers to manipulate the memory allocation. The complexity of executing such an attack is considered to be high, and although the technical exploit is publicly available, proper safeguards are necessary to mitigate exploitation risks. Despite early notification to the vendor, there has been no response regarding this security issue.

Affected Version(s)

bftpd 6.0

bftpd 6.1

bftpd 6.2

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2025-11947 - Proof of Concept

References

https://vuldb.com/?id.329027
vdb-entrytechnical-description
https://vuldb.com/?ctiid.329027
signaturepermissions-required
https://vuldb.com/?submit.673133
third-party-advisory

CVSS V4

Score:
2
Severity:
LOW
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Local
Attack Complexity:
High
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

zh_vul (VulDB User)
JSON
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CVE-2025-11947 : Heap-Based Buffer Overflow in bftpd Configuration File Handler