74242baa41
Since the number of files in the EOCD record isn't validated, it isn't safe to preallocate Reader.Files using that field. A malformed archive can indicate it contains up to 1 << 128 - 1 files. We can still safely preallocate the slice by checking if the specified number of files in the archive is reasonable, given the size of the archive. Thanks to the OSS-Fuzz project for discovering this issue and to Emmanuel Odeke for reporting it. Fixes #46242 Fixes CVE-2021-33196 Change-Id: I3c76d8eec178468b380d87fdb4a3f2cb06f0ee76 Reviewed-on: https://go-review.googlesource.com/c/go/+/318909 Trust: Roland Shoemaker <roland@golang.org> Trust: Katie Hockman <katie@golang.org> Trust: Joe Tsai <thebrokentoaster@gmail.com> Run-TryBot: Roland Shoemaker <roland@golang.org> TryBot-Result: Go Bot <gobot@golang.org> Reviewed-by: Katie Hockman <katie@golang.org> Reviewed-by: Joe Tsai <thebrokentoaster@gmail.com> |
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