CVE-2025-6499
vstakhov libucl ucl_parser.c ucl_parse_multiline_string heap-based overflow
- State
- Published
- Severity
- 4.8 Medium
- Published
- Jun 23, 2025
- Updated
- Jun 23, 2025
- Reserved
- Jun 22, 2025
Description
A vulnerability classified as problematic was found in vstakhov libucl up to 0.9.2. Affected by this vulnerability is the function ucl_parse_multiline_string of the file src/ucl_parser.c. The manipulation leads to heap-based buffer overflow. The attack needs to be approached locally. The exploit has been disclosed to the public and may be used.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 4.8 Medium | CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P | VulDB |
| 3.1 | 3.3 Low | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R | VulDB |
| 3.0 | 3.3 Low | CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R | VulDB |
| 2.0 | 1.7 Low | AV:L/AC:L/Au:S/C:N/I:N/A:P/E:POC/RL:ND/RC:UR | VulDB |
Weaknesses
Affected Products
| Product | Versions |
|---|---|
libuclvstakhov |
|
References
- VDB-313615 | vstakhov libucl ucl_parser.c ucl_parse_multiline_string heap-based overflowvdb-entrytechnical-description
- VDB-313615 | CTI Indicators (IOB, IOC, IOA)signaturepermissions-required
- Submit #601011 | vstakhov libucl libucl 0.9.2 (commit 3e7f023) Heap-based Buffer Overflowthird-party-advisory
- https://github.com/vstakhov/libucl/issues/319issue-tracking
- https://github.com/user-attachments/files/19825399/libucl_crash.txtexploit
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