| commit | bacbc33439b124ffd7392c91a5f5d96eca8c0c0b | [log] [tgz] |
|---|---|---|
| author | Roland Shoemaker <roland@golang.org> | Wed Aug 18 11:49:29 2021 -0700 |
| committer | Roland Shoemaker <roland@golang.org> | Fri Aug 20 16:49:35 2021 +0000 |
| tree | b0bc71b1dfd2a1d99dfd360173fc2a7773bfc512 | |
| parent | 700743137462471189f58ee85fe64754cd340322 [diff] |
archive/zip: prevent preallocation check from overflowing If the indicated directory size in the archive header is so large that subtracting it from the archive size overflows a uint64, the check that the indicated number of files in the archive can be effectively bypassed. Prevent this from happening by checking that the indicated directory size is less than the size of the archive. Thanks to the OSS-Fuzz project for discovering this issue and to Emmanuel Odeke for reporting it. Fixes #47801 Fixes CVE-2021-39293 Change-Id: Ifade26b98a40f3b37398ca86bd5252d12394dd24 Reviewed-on: https://go-review.googlesource.com/c/go/+/343434 Trust: Roland Shoemaker <roland@golang.org> Run-TryBot: Roland Shoemaker <roland@golang.org> TryBot-Result: Go Bot <gobot@golang.org> Reviewed-by: Russ Cox <rsc@golang.org>
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