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CWE

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CVE-2025-6499

Published: Jun 23, 2025

Modified: Jun 23, 2025

PUBLISHED

CVSS v3.1

3.3

LOW

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.

Vendor	Product	Versions
vstakhov	libucl	affected `0.9.0` affected `0.9.1` affected `0.9.2`

Weaknesses (CWE)

CVSS v3.1 Details

CVSS v3.1 Vector

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

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

Low

References

VDB-313615 | vstakhov libucl ucl_parser.c ucl_parse_multiline_string heap-based overflow

vdb-entry

technical-description

VDB-313615 | CTI Indicators (IOB, IOC, IOA)

signature

permissions-required

Submit #601011 | vstakhov libucl libucl 0.9.2 (commit 3e7f023) Heap-based Buffer Overflow

third-party-advisory

https://github.com/vstakhov/libucl/issues/319

issue-tracking

https://github.com/user-attachments/files/19825399/libucl_crash.txt

exploit

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