LibreDWG: const-input mutation and crash in bit_TV_to_utf8 error handling
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
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| LibreDWG | libredwg | affected |
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| Libredwg | Libredwg |
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No CVSS v4.0
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.118% probability within 30 days)
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ssvc
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| First Time appeared |
Libredwg
Libredwg libredwg |
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| Vendors & Products |
Libredwg
Libredwg libredwg |
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| Description | LibreDWG is a free C library to read and write DWG files. Prior to 0.14, `bit_TV_to_utf8()` in `src/bits.c` can write to the caller-provided `src` buffer despite accepting const input. On an `iconv()` error other than `E2BIG`, the function frees its output buffer and passes the original input alias to `bit_u_expand()`, which expands or shrinks Unicode and multibyte escape sequences in place. If the input is a string literal, read-only mapping, or other immutable buffer, the write can cause a segmentation fault and denial of service; mutable caller-owned input can be unexpectedly modified before being returned. This affects applications that expose the conversion API to untrusted input under those conditions. Direct file-triggered exploitability through normal DWG decode/export paths remains unconfirmed because many TV strings are heap allocated by bit_read_TV(). This issue is fixed in version 0.14. | |
| Title | LibreDWG: const-input mutation and crash in bit_TV_to_utf8 error handling | |
| Weaknesses | CWE-471 CWE-703 |
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| References |
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| Metrics |
cvssV3_1
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