| Package | Affected versions | Patched versions |
|---|---|---|
| fflate | ≤ 0.8.2 | |
| fflate | ≥ 0.4.5, < 0.4.9≥ 0.5.0, < 0.5.4≥ 0.6.0, < 0.6.11≥ 0.7.0, < 0.7.5≥ 0.8.0, < 0.8.3 | 0.4.90.5.40.6.110.7.50.8.3 |
fflate through 0.8.2 is vulnerable to denial of service via an infinite loop in unzipSync(). A crafted ZIP archive with a central directory entry declaring compressed_size=0xFFFFFFFF (ZIP64 sentinel) but missing the required ZIP64 extra field tag 0x0001 causes z64e() to loop indefinitely due to out-of-bounds reads returning undefined, which coerces to 0, keeping the loop condition permanently true.
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