CVE-2025-66877
Buffer Overflow in libming 0.4.8 dcputchar Function
Publication date: 2025-12-29
Last updated on: 2025-12-29
Assigner: MITRE
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| libming | libming | 0.4.8 |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-UNKNOWN |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability is a buffer overflow in the function dcputchar within the decompile.c file of libming version 0.4.8. A buffer overflow occurs when more data is written to a buffer than it can hold, potentially leading to unexpected behavior or security issues.
How can this vulnerability impact me? :
The buffer overflow vulnerability could allow an attacker to cause a crash, execute arbitrary code, or corrupt data when the vulnerable function processes input. This can lead to system instability or compromise.
How can this vulnerability be detected on my network or system? Can you suggest some commands?
This vulnerability can be detected by monitoring for crashes or abnormal behavior in the swftophp utility when processing SWF files, especially malformed ones with incorrect file size headers. Using AddressSanitizer (ASAN) during fuzz testing or runtime can help detect heap-buffer-overflow errors related to this issue. A practical approach is to run swftophp on suspicious SWF files and observe for crashes or ASAN reports. Example command to test a file: `ASAN_OPTIONS=detect_stack_use_after_return=1 ./swftophp suspicious.swf`. Additionally, fuzz testing tools targeting swftophp can help identify triggering inputs. [1]
What immediate steps should I take to mitigate this vulnerability?
Immediate mitigation steps include avoiding the use of libming version 0.4.8 or the swftophp utility on untrusted or malformed SWF files. If possible, update to a patched version of libming once available. In the meantime, implement input validation to reject SWF files with suspiciously large or inconsistent file size headers before processing. Running swftophp in a sandboxed or isolated environment can also reduce risk from potential exploitation. [1]