7.3

CVSS Score

3.1

-

CVSS Score

Basic Information

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CVE-2025-2176

CVE-2025-2176: A vulnerability classified as critical has been found in libzvbi up to 0.2.43. This affects the...

A vulnerability classified as critical has been found in libzvbi up to 0.2.43. This affects the function vbi_capture_sim_load_caption of the file src/io-sim.c. The manipulation leads to integer overflow. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used. Upgrading to version 0.2.44 is able to address this issue. The identifier of the patch is ca1672134b3e2962cd392212c73f44f8f4cb489f. It is recommended to upgrade the affected component. The code maintainer was informed beforehand about the issues. She reacted very fast and highly professional.

(GitHub Advisory)

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CVE-2025-2176

CVE-2025-2176:

7.3

CVSS Score

3.1

-

CVSS Score

Basic Information

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Technical Details

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Root Cause Analysis

The vulnerability description explicitly mentioned vbi_capture_sim_load_caption in src/io-sim.c as being affected by an integer overflow. The provided commit ca1672134b3e2962cd392212c73f44f8f4cb489f contains patches for this function, as well as for strndup_identity and strndup_utf8_ucs2 in src/conv.c, and vbi_search_new in src/search.c. All these patches introduce checks to prevent integer overflows before memory allocation (e.g., b->capacity + 256, src_size + 4, src_length * 3 + 1, sizeof(ucs2_t) * pat_len * 2). These checks involve comparing the original size component with the calculated allocation size; if the original component is larger, it implies an overflow occurred during the calculation of the allocation size. This indicates that these functions were indeed vulnerable to integer overflows that could lead to heap-based buffer overflows due to undersized memory allocations. The commit message 'src/conv.c, src/io-sim.c, src/search.c: Avoid integer overflow leading to heap overflow' further confirms that these changes are security mitigations for integer overflow vulnerabilities.

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WAF Rule

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Reasoning

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