6446af942e
The chunked transfer encoding adds some overhead to the content transferred. When writing one byte per chunk, for example, there are five bytes of overhead per byte of data transferred: "1\r\nX\r\n" to send "X". Chunks may include "chunk extensions", which we skip over and do not use. For example: "1;chunk extension here\r\nX\r\n". A malicious sender can use chunk extensions to add about 4k of overhead per byte of data. (The maximum chunk header line size we will accept.) Track the amount of overhead read in chunked data, and produce an error if it seems excessive. Updates #64433 Fixes #64434 Fixes CVE-2023-39326 Change-Id: I40f8d70eb6f9575fb43f506eb19132ccedafcf39 Reviewed-on: https://team-review.git.corp.google.com/c/golang/go-private/+/2076135 Reviewed-by: Tatiana Bradley <tatianabradley@google.com> Reviewed-by: Roland Shoemaker <bracewell@google.com> (cherry picked from commit 3473ae72ee66c60744665a24b2fde143e8964d4f) Reviewed-on: https://team-review.git.corp.google.com/c/golang/go-private/+/2095407 Run-TryBot: Roland Shoemaker <bracewell@google.com> TryBot-Result: Security TryBots <security-trybots@go-security-trybots.iam.gserviceaccount.com> Reviewed-by: Damien Neil <dneil@google.com> Reviewed-on: https://go-review.googlesource.com/c/go/+/547355 Reviewed-by: Dmitri Shuralyov <dmitshur@google.com> LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com> |
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The Go Programming Language
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