CVE-2025-6499

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.

CVSS v3.1 Score

3.3

LOW

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

Weakness Type (CWE)

CWE-119 Buffer Overflow

CWE-122 CWE-122

CWE-787 Out-of-bounds Write

Affected Products

Vendor	Product	Versions
vstakhov	libucl	< 0.9.2

References

Exploits

https://github.com/user-attachments/files/19825399/libucl_crash.txt https://github.com/vstakhov/libucl/issues/319 https://github.com/vstakhov/libucl/issues/319

Other References

https://vuldb.com/?ctiid.313615 https://vuldb.com/?id.313615 https://vuldb.com/?submit.601011

Frequently Asked Questions

What is CVE-2025-6499? +

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. It has a CVSS v3.1 base score of 3.3 (LOW).

How severe is CVE-2025-6499? +

CVE-2025-6499 has a CVSS v3.1 score of 3.3 out of 10, rated LOW. This is a low-severity vulnerability with limited impact.

What products are affected by CVE-2025-6499? +

CVE-2025-6499 affects products from vstakhov, specifically: libucl. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-6499? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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