CVE-2025-59729
MediumCVSS 5.7Exploitation Probability (EPSS)
Low risk5th percentile - higher than 5% of all known CVEs
Summary
When parsing the header for a DHAV file, an integer underflow in offset calculation leads to reading the duration from before the start of the allocated buffer when the file is larger than MAX_DURATION_BUFFER_SIZE.
Risk Assessment
This could allow an attacker to read sensitive memory data or cause a denial of service by providing a crafted DHAV file.
Recommendation
Upgrade to version 8.0 or later, which includes the fix for this issue.
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Original NVD description (English source)
When parsing the header for a DHAV file, there's an integer underflow in offset calculation that leads to reading the duration from before the start of the allocated buffer. If we load a DHAV file that is larger than MAX_DURATION_BUFFER_SIZE bytes (0x100000) for example 0x101000 bytes, then at [0] we have size = 0x101000. At [1] we have end_buffer_size = 0x100000, and at [2] we have end_buffer_pos = 0x1000. The loop then scans backwards through the buffer looking for the dhav tag; when it is found, we'll calculate end_pos based on a 32-bit offset read from the buffer. There is subsequently a check [3] that end_pos is within the section of the file that has been copied into end_buffer, but it only correctly handles the cases where end_pos is before the start of the file or after the section copied into end_buffer, and not the case where end_pos is within the the file, but before the section copied into end_buffer. If we provide such an offset, (end_pos - end_buffer_pos) can underflow, resulting in the subsequent access at [4] occurring before the beginning of the allocation. We recommend upgrading to version 8.0 or beyond.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS