Published:2024/03/25  Last Updated:2024/03/25

ffBull vulnerable to OS command injection


ffBull contains an OS command injection vulnerability.

Vendor Information

Fortunefield (according to the original report submitted by the reporter)

ffBull ver.4.11


ffBull <> (according to the original report submitted by the reporter) provided by Fortunefield is a bulletin board system (BBS).
ffBull contains an OS command injection vulnerability (CWE-78).


A remote unauthenticated attacker may execute an arbitrary OS command with the privilege of the running web server.


Consider stop using ffBull ver.4.11
Since the developer was unreachable, existence of any mitigations is unknown.

Vendor Opinion

None provided

JPCERT/CC Addendum

During the meeting of Committee for authorizing the disclosure of unresolved vulnerabilities held on December 20, 2023, it was judged that an advisory for this vulnerability shall be disclosed since all the criteria and conditions described below which are stated in Standards for Handling Vulnerability related Information of Software Products and Other and Information Security Early Warning Partnership Guideline have been satisfied.

  1. The developer of the product is unreachable:
    JPCERT/CC had tried to reach the developer for a period of time (more than 6 months) however there were no responses from the developer. Therefore the committee reached the conclusion that it is reasonable and appropriate to judge the developer is unreachable.

    - No response to disclosure of the developer's name (listed on September 29, 2011) in "List of unreachable developers" and to the disclosure of the product name and its version (listed on December 16, 2011) in “Information Request” on JVN
  2. Existence of vulnerability has been verified:
    It was verified by IPA that the product allows execution of an arbitrary program on the server, which violates the "Confidentiality", "Integrity", and "Availability" of the product. For verification details, refer to the "Verification" section.

  3. Not disclosing this case may result in the risk that product users will have no means to know of the existence of the vulnerability in the product:
    The developer either has not published an advisory for this vulnerability or it is not confirmed that the developer knows all the product users, therefore, it was judged there is a risk that the product users who do not know of the existence of the vulnerability exist.

  4. There are no particular reasons that would make disclosure inappropriate:
    After considering the developer’s stance and the risk to product users, the committee has judged that there are no particular reasons that would make disclosure inappropriate or that disclosure may cause any other issues.

Vulnerability Analysis by JPCERT/CC

Base Score: 9.8
Attack Vector(AV) Physical (P) Local (L) Adjacent (A) Network (N)
Attack Complexity(AC) High (H) Low (L)
Privileges Required(PR) High (H) Low (L) None (N)
User Interaction(UI) Required (R) None (N)
Scope(S) Unchanged (U) Changed (C)
Confidentiality Impact(C) None (N) Low (L) High (H)
Integrity Impact(I) None (N) Low (L) High (H)
Availability Impact(A) None (N) Low (L) High (H)
Base Score: 7.5
Access Vector(AV) Local (L) Adjacent Network (A) Network (N)
Access Complexity(AC) High (H) Medium (M) Low (L)
Authentication(Au) Multiple (M) Single (S) None (N)
Confidentiality Impact(C) None (N) Partial (P) Complete (C)
Integrity Impact(I) None (N) Partial (P) Complete (C)
Availability Impact(A) None (N) Partial (P) Complete (C)


The vulnerability was reported to IPA and its existence was confirmed by IPA.

Date of validation

  • September 13, 2023
Validation environment (Server/Product version)
  • OS: Microsoft Windows 10 Pro (64-bit) 22H2/19045.3155
  • Middleware: Apache 2.4.56
  • Software: ffBull v.4.11
Validation environment (Client)
  • OS: Microsoft Windows 10 Pro (64-bit) 22H2/19045.3155
  • Web browser: Microsoft Edge 90.0.818.56
Validation result
  • It was confirmed that an arbitrary program was executed on the server by sending a specially crafted request to the product. Therefore, the reproduction of an OS command injection vulnerability was confirmed.


Other Information

JPCERT Reports
CERT Advisory
CPNI Advisory
CVE CVE-2024-28048
JVN iPedia JVNDB-2024-000906