| パッケージ | 影響を受けるバージョン | 修正済みバージョン |
|---|---|---|
| pillow | ≥ 4.2.0, < 12.2.0 | 12.2.0 |
| pillow | ≥ 4.2.0, < 12.2.0 | 12.2.0 |
An attacker can supply a malicious PDF that causes the process to hang indefinitely, consuming 100% CPU and making the application unresponsive.
Patched version: 12.2.0.
PdfParser (introduced in Pillow 4.2.0) follows Prev pointers in PDF trailers to read cross-reference sections. If a trailer's Prev pointer references an offset that has already been processed — either pointing to itself or forming a longer cycle — the parser enters an infinite loop. Pillow now tracks previously processed trailer offsets and raises an error if a cycle is detected.
Use any version but the affected versions: >= 4.2.0, < 12.2.0
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