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docker-compose: patch CVE-2024-45337 (#11819)
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Signed-off-by: Muhammad Falak R Wani <[email protected]>
Co-authored-by: jslobodzian <[email protected]>
(cherry picked from commit 0158d9e)
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mfrw authored and CBL-Mariner-Bot committed Jan 9, 2025
1 parent db2fd14 commit a73e7c7
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80 changes: 80 additions & 0 deletions SPECS/docker-compose/CVE-2024-45337.patch
Original file line number Diff line number Diff line change
@@ -0,0 +1,80 @@
From 66fd5d19c5ea8c7f4f7ff69bcc93a7c8231ce4cf Mon Sep 17 00:00:00 2001
From: Roland Shoemaker <[email protected]>
Date: Tue, 3 Dec 2024 09:03:03 -0800
Subject: [PATCH] ssh: make the public key cache a 1-entry FIFO cache

Users of the the ssh package seem to extremely commonly misuse the
PublicKeyCallback API, assuming that the key passed in the last call
before a connection is established is the key used for authentication.
Some users then make authorization decisions based on this key. This
property is not documented, and may not be correct, due to the caching
behavior of the package, resulting in users making incorrect
authorization decisions about the connection.

This change makes the cache a one entry FIFO cache, making the assumed
property, that the last call to PublicKeyCallback represents the key
actually used for authentication, actually hold.

Thanks to Damien Tournoud, Patrick Dawkins, Vince Parker, and
Jules Duvivier from the Platform.sh / Upsun engineering team
for reporting this issue.

Fixes golang/go#70779
Fixes CVE-2024-45337

Change-Id: Ife7c7b4045d8b6bcd7e3a417bdfae370c709797f
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/635315
Reviewed-by: Roland Shoemaker <[email protected]>
Auto-Submit: Gopher Robot <[email protected]>
Reviewed-by: Damien Neil <[email protected]>
Reviewed-by: Nicola Murino <[email protected]>
LUCI-TryBot-Result: Go LUCI <[email protected]>
Signed-off-by: Muhammad Falak R Wani <[email protected]>
---
vendor/golang.org/x/crypto/ssh/server.go | 15 +++++++++++----
1 file changed, 11 insertions(+), 4 deletions(-)

diff --git a/vendor/golang.org/x/crypto/ssh/server.go b/vendor/golang.org/x/crypto/ssh/server.go
index c2dfe32..39dcc09 100644
--- a/vendor/golang.org/x/crypto/ssh/server.go
+++ b/vendor/golang.org/x/crypto/ssh/server.go
@@ -149,7 +149,7 @@ func (s *ServerConfig) AddHostKey(key Signer) {
}

// cachedPubKey contains the results of querying whether a public key is
-// acceptable for a user.
+// acceptable for a user. This is a FIFO cache.
type cachedPubKey struct {
user string
pubKeyData []byte
@@ -157,7 +157,13 @@ type cachedPubKey struct {
perms *Permissions
}

-const maxCachedPubKeys = 16
+// maxCachedPubKeys is the number of cache entries we store.
+//
+// Due to consistent misuse of the PublicKeyCallback API, we have reduced this
+// to 1, such that the only key in the cache is the most recently seen one. This
+// forces the behavior that the last call to PublicKeyCallback will always be
+// with the key that is used for authentication.
+const maxCachedPubKeys = 1

// pubKeyCache caches tests for public keys. Since SSH clients
// will query whether a public key is acceptable before attempting to
@@ -179,9 +185,10 @@ func (c *pubKeyCache) get(user string, pubKeyData []byte) (cachedPubKey, bool) {

// add adds the given tuple to the cache.
func (c *pubKeyCache) add(candidate cachedPubKey) {
- if len(c.keys) < maxCachedPubKeys {
- c.keys = append(c.keys, candidate)
+ if len(c.keys) >= maxCachedPubKeys {
+ c.keys = c.keys[1:]
}
+ c.keys = append(c.keys, candidate)
}

// ServerConn is an authenticated SSH connection, as seen from the
--
2.34.1

6 changes: 5 additions & 1 deletion SPECS/docker-compose/docker-compose.spec
Original file line number Diff line number Diff line change
@@ -1,7 +1,7 @@
Summary: Define and run multi-container applications with Docker
Name: docker-compose
Version: 2.27.0
Release: 1%{?dist}
Release: 2%{?dist}
License: ASL 2.0
Vendor: Microsoft Corporation
Distribution: Azure Linux
Expand All @@ -12,6 +12,7 @@ Source0: https://github.com/docker/compose/archive/refs/tags/v%{version}.
# NOTE: govendor-v1 format is for inplace CVE updates so that we do not have to overwrite in the blob-store.
# After fixing any possible CVE for the vendored source, we must bump v1 -> v2
Source1: %{name}-%{version}-govendor-v1.tar.gz
Patch0: CVE-2024-45337.patch
BuildRequires: golang
Requires: docker-cli
Obsoletes: moby-compose < %{version}-%{release}
Expand Down Expand Up @@ -44,6 +45,9 @@ install -D -m0755 bin/build/docker-compose %{buildroot}/%{_libexecdir}/docker/cl
%{_libexecdir}/docker/cli-plugins/docker-compose

%changelog
* Wed Jan 08 2025 Muhammad Falak <[email protected]> - 2.27.0-2
- Patch CVE-2024-45337

* Thu May 02 2024 CBL-Mariner Servicing Account <[email protected]> - 2.27.0-1
- Auto-upgrade to 2.27.0 - address CVE-2024-23653

Expand Down

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