Bug 2374247 (CVE-2025-6499)

Summary: CVE-2025-6499 libucl: Libucl Heap Overflow
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
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Priority: low    
Version: unspecifiedKeywords: Security
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OS: Linux   
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A flaw was found in libucl. The `ucl_parse_multiline_string` function in `src/ucl_parser.c` is vulnerable to a heap-based buffer overflow due to improper bounds checking during multiline string parsing. This flaw allows a local attacker to trigger this overflow by providing a specially crafted input file, leading to a denial of service.
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Bug Depends On: 2374251, 2374252    
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Description OSIDB Bzimport 2025-06-23 03:01:08 UTC 
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.