| Titel | gpac v2.4.0 Out-of-bounds Write |
|---|
| Beschreibung | When MP4Box imports SRT subtitles through the BIFS scene pipeline (-mp4 <scene>.bt with MuxInfo{textNode,fontNode}), gf_text_import_srt_bifs() converts subtitle text into UTF-8-like output but writes into a fixed stack buffer char szText[2048] without bounds checking. With crafted input (many high-bit bytes), the conversion expands the output and triggers an out-of-bounds write.
UBSan reports:
runtime error: index 2048 out of bounds for type 'char [2048]' inside gf_text_import_srt_bifs(). |
|---|
| Quelle | ⚠️ https://github.com/gpac/gpac/issues/3425 |
|---|
| Benutzer | Kery Qi (UID 94424) |
|---|
| Einreichung | 12.01.2026 13:57 (vor 3 Monaten) |
|---|
| Moderieren | 25.01.2026 10:58 (13 days later) |
|---|
| Status | Akzeptiert |
|---|
| VulDB Eintrag | 342807 [GPAC bis 2.4.0 SRT Subtitle Import text_to_bifs.c gf_text_import_srt_bifs Pufferüberlauf] |
|---|
| Punkte | 20 |
|---|