LIBPNG is a reference library for use in applications that process PNG (Portable Network Graphics) raster image files. In version 1.8.0, three inter-frame chunk discard paths in the push-mode APNG parser clear the chunk-header flag without consuming the chunk body and CRC, allowing attacker-controlled bytes inside an ignored ancillary chunk to be reinterpreted as a fresh chunk header on the next call to `png_process_data`. Commit faf06924688b62d7c1654b5ceddedbde66ffadb4 fixes the issue.
| Vendor | Product | Versions |
|---|---|---|
| libpng | libpng | = 1.8.0, >= 1.6.49, <= 1.6.57 |
Downstream vendors/products affected by this vulnerability
| Vendor | Product | Source | Confidence |
|---|---|---|---|
| open source | libpng | cert_advisory | 90% |
Updated description with details about Denial of Service and changed severity to HIGH.
Updated severity to CRITICAL and corrected exploit availability to false.
Initial creation
