fix CVE-2023-45288

This commit is contained in:
bwzhang 2024-04-17 14:52:25 +08:00
parent d3651b4372
commit ecd59e3330
2 changed files with 97 additions and 1 deletions

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@ -0,0 +1,88 @@
From 8ad98662ed31e6b3ae98a9df57355bebddfcf0d6 Mon Sep 17 00:00:00 2001
From: bwzhang <zhangbowei@kylinos.cn>
Date: Wed, 17 Apr 2024 14:45:01 +0800
Subject: [PATCH] fix CVE-2023-45288
http2: close connections when receiving too many headers
Maintaining HPACK state requires that we parse and process
all HEADERS and CONTINUATION frames on a connection.
When a request's headers exceed MaxHeaderBytes, we don't
allocate memory to store the excess headers but we do
parse them. This permits an attacker to cause an HTTP/2
endpoint to read arbitrary amounts of data, all associated
with a request which is going to be rejected.
Set a limit on the amount of excess header frames we
will process before closing a connection.
Thanks to Bartek Nowotarski for reporting this issue.
Fixes CVE-2023-45288
Fixes golang/go#65051
Change-Id: I15df097268df13bb5a9e9d3a5c04a8a141d850f6
Reviewed-on: https://team-review.git.corp.google.com/c/golang/go-private/+/2130527
Reviewed-by: Roland Shoemaker <bracewell@google.com>
Reviewed-by: Tatiana Bradley <tatianabradley@google.com>
Reviewed-on: https://go-review.googlesource.com/c/net/+/576155
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Auto-Submit: Dmitri Shuralyov <dmitshur@golang.org>
Reviewed-by: Than McIntosh <thanm@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
---
vendor/golang.org/x/net/http2/frame.go | 31 ++++++++++++++++++++++++++
1 file changed, 31 insertions(+)
diff --git a/vendor/golang.org/x/net/http2/frame.go b/vendor/golang.org/x/net/http2/frame.go
index 514c126..37f3e0e 100644
--- a/vendor/golang.org/x/net/http2/frame.go
+++ b/vendor/golang.org/x/net/http2/frame.go
@@ -1521,6 +1521,7 @@ func (fr *Framer) readMetaFrame(hf *HeadersFrame) (*MetaHeadersFrame, error) {
if size > remainSize {
hdec.SetEmitEnabled(false)
mh.Truncated = true
+ remainSize = 0
return
}
remainSize -= size
@@ -1533,6 +1534,36 @@ func (fr *Framer) readMetaFrame(hf *HeadersFrame) (*MetaHeadersFrame, error) {
var hc headersOrContinuation = hf
for {
frag := hc.HeaderBlockFragment()
+
+ // Avoid parsing large amounts of headers that we will then discard.
+ // If the sender exceeds the max header list size by too much,
+ // skip parsing the fragment and close the connection.
+ //
+ // "Too much" is either any CONTINUATION frame after we've already
+ // exceeded the max header list size (in which case remainSize is 0),
+ // or a frame whose encoded size is more than twice the remaining
+ // header list bytes we're willing to accept.
+ if int64(len(frag)) > int64(2*remainSize) {
+ if VerboseLogs {
+ log.Printf("http2: header list too large")
+ }
+ // It would be nice to send a RST_STREAM before sending the GOAWAY,
+ // but the struture of the server's frame writer makes this difficult.
+ return nil, ConnectionError(ErrCodeProtocol)
+ }
+
+ // Also close the connection after any CONTINUATION frame following an
+ // invalid header, since we stop tracking the size of the headers after
+ // an invalid one.
+ if invalid != nil {
+ if VerboseLogs {
+ log.Printf("http2: invalid header: %v", invalid)
+ }
+ // It would be nice to send a RST_STREAM before sending the GOAWAY,
+ // but the struture of the server's frame writer makes this difficult.
+ return nil, ConnectionError(ErrCodeProtocol)
+ }
+
if _, err := hdec.Write(frag); err != nil {
return nil, ConnectionError(ErrCodeCompression)
}
--
2.20.1

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@ -31,7 +31,7 @@ system.}
%global gosupfiles integration/fixtures/* etcdserver/api/v2http/testdata/*
Name: etcd
Release: 5
Release: 6
Summary: Distributed reliable key-value store for the most critical data of a distributed system
# Upstream license specification: Apache-2.0
@ -47,6 +47,7 @@ Source10: genmanpages.sh
Patch1: 0001-Convert-int-to-string-using-strconv.Itoa.patch
Patch2: 0002-Etcd-on-unsupported-platform-without-ETCD_UNSUPPORTED_ARCH=arm64-set.patch
Patch3: 0003-etcd-Add-sw64-architecture.patch
Patch4: 0004-fix-CVE-2023-45288.patch
BuildRequires: golang
BuildRequires: python3-devel
@ -64,6 +65,7 @@ Requires(pre): shadow-utils
%forgesetup
%patch1 -p1
%patch2 -p1
%patch4 -p1
%ifarch sw_64
%patch3 -p1
%endif
@ -152,6 +154,12 @@ getent passwd %{name} >/dev/null || useradd -r -g %{name} -d %{_sharedstatedir}/
%endif
%changelog
* Wed Apr 17 2024 zhangbowei <zhangbowei@kylinos.cn> -3.4.14-6
- Type:bugfix
- CVE:NA
- SUG:NA
- DESC: fix CVE-2023-45288
* Wed Oct 19 2022 wuzx<wuzx1226@qq.com> - 3.4.14-5
- add sw64 patch