Update module google.golang.org/grpc to v1.56.3 [SECURITY] #167
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This PR contains the following updates:
v1.43.0
->v1.56.3
GitHub Vulnerability Alerts
GHSA-m425-mq94-257g
Impact
In affected releases of gRPC-Go, it is possible for an attacker to send HTTP/2 requests, cancel them, and send subsequent requests, which is valid by the HTTP/2 protocol, but would cause the gRPC-Go server to launch more concurrent method handlers than the configured maximum stream limit.
Patches
This vulnerability was addressed by #6703 and has been included in patch releases: 1.56.3, 1.57.1, 1.58.3. It is also included in the latest release, 1.59.0.
Along with applying the patch, users should also ensure they are using the
grpc.MaxConcurrentStreams
server option to apply a limit to the server's resources used for any single connection.Workarounds
None.
References
#6703
CVE-2023-44487
HTTP/2 Rapid reset attack
The HTTP/2 protocol allows clients to indicate to the server that a previous stream should be canceled by sending a RST_STREAM frame. The protocol does not require the client and server to coordinate the cancellation in any way, the client may do it unilaterally. The client may also assume that the cancellation will take effect immediately when the server receives the RST_STREAM frame, before any other data from that TCP connection is processed.
Abuse of this feature is called a Rapid Reset attack because it relies on the ability for an endpoint to send a RST_STREAM frame immediately after sending a request frame, which makes the other endpoint start working and then rapidly resets the request. The request is canceled, but leaves the HTTP/2 connection open.
The HTTP/2 Rapid Reset attack built on this capability is simple: The client opens a large number of streams at once as in the standard HTTP/2 attack, but rather than waiting for a response to each request stream from the server or proxy, the client cancels each request immediately.
The ability to reset streams immediately allows each connection to have an indefinite number of requests in flight. By explicitly canceling the requests, the attacker never exceeds the limit on the number of concurrent open streams. The number of in-flight requests is no longer dependent on the round-trip time (RTT), but only on the available network bandwidth.
In a typical HTTP/2 server implementation, the server will still have to do significant amounts of work for canceled requests, such as allocating new stream data structures, parsing the query and doing header decompression, and mapping the URL to a resource. For reverse proxy implementations, the request may be proxied to the backend server before the RST_STREAM frame is processed. The client on the other hand paid almost no costs for sending the requests. This creates an exploitable cost asymmetry between the server and the client.
Multiple software artifacts implementing HTTP/2 are affected. This advisory was originally ingested from the
swift-nio-http2
repo advisory and their original conent follows.swift-nio-http2 specific advisory
swift-nio-http2 is vulnerable to a denial-of-service vulnerability in which a malicious client can create and then reset a large number of HTTP/2 streams in a short period of time. This causes swift-nio-http2 to commit to a large amount of expensive work which it then throws away, including creating entirely new
Channel
s to serve the traffic. This can easily overwhelm anEventLoop
and prevent it from making forward progress.swift-nio-http2 1.28 contains a remediation for this issue that applies reset counter using a sliding window. This constrains the number of stream resets that may occur in a given window of time. Clients violating this limit will have their connections torn down. This allows clients to continue to cancel streams for legitimate reasons, while constraining malicious actors.
Release Notes
grpc/grpc-go (google.golang.org/grpc)
v1.56.3
: Release 1.56.3Compare Source
Security
server: prohibit more than MaxConcurrentStreams handlers from running at once (CVE-2023-44487)
In addition to this change, applications should ensure they do not leave running tasks behind related to the RPC before returning from method handlers, or should enforce appropriate limits on any such work.
v1.56.2
: Release 1.56.2Compare Source
status.FromError
now returns an error withcodes.Unknown
when the error implements theGRPCStatus()
method, and callingGRPCStatus()
returnsnil
. (#6374)v1.56.1
: Release 1.56.1Compare Source
v1.56.0
: Release 1.56.0Compare Source
New Features
WithIdleTimeout
dial option (#6263)Bug Fixes
API Changes
v1.55.1
: Release 1.55.1Compare Source
status.FromError
now returns an error withcodes.Unknown
when the error implements theGRPCStatus()
method, and callingGRPCStatus()
returnsnil
. (#6374)v1.55.0
: Release 1.55.0Compare Source
Behavior Changes
status.Code
andstatus.FromError
handle wrapped errors (#6031 and #6150)New Features
ignore_resource_deletion
server feature as per gRFC A53 (#6035)Bug Fixes
Performance Improvements
NumStreamWorkers
is used (#6004)v1.54.1
: Release 1.54.1Compare Source
Bug Fixes
v1.54.0
: Release 1.54.0Compare Source
Behavior Changes
New Features
SetSendCompressor
API to set send compressor name (#5744)Node
proto only in the first discovery request message, to improve performance (#6078)Bug Fixes
AppendToOutgoingContext
(#6001)Documentation
Resolver.Scheme()
docstring to mention requirement of lowercase scheme names (#6014)UpdateState
errors (#6002)v1.53.0
: Release 1.53.0Compare Source
API Changes
resolver.Target.Endpoint
and replace withresolver.Target.Endpoint()
(#5852)New Features
GRPC_RING_HASH_CAP
environment variable to override the maximum ring size. (#5884)Bug Fixes
Documentation
NewOauthAccess
as deprecated (#5882)v1.52.3
: Release 1.52.3Compare Source
Bug Fixes
v1.52.1
: Release 1.52.1Compare Source
Bug Fixes
v1.52.0
: Release 1.52.0Compare Source
New Features
max_ring_size
to reduce possibility of OOMs (#5801)Behavior Changes
Dial
if an empty target is passed and no custom dialer is present; the ClientConn would otherwise be unable to connect and perform RPCs (#5732)Bug Fixes
:authority
header matches server name used in TLS handshake when the latter is overridden by the name resolver (#5748)Documentation
v1.51.0
: Release 1.51.0Compare Source
Behavior Changes
New Features
TRANSIENT_FAILURE
(#5711)Bug Fixes
v1.50.1
: Release 1.50.1Compare Source
New Features
v1.50.0
: Release 1.50.0Compare Source
Behavior Changes
client: use proper "@" semantics for connecting to abstract unix sockets. (#5678)
New Features
ValueFromIncomingContext
to more efficiently retrieve a single value (#5596)HandleConn
context (#5589)Bug Fixes
cluster_specifier_plugin
set to be NACKed when GRPC_EXPERIMENTAL_XDS_RLS_LB was off (#5670)config_source_specifier
inlrs_server
is notself
(#5613)IDLE
instead of falling back on the default channel behavior of connecting to all addresses (#5614)IDLE
(#5656)WaitForReady
on handshaker service RPCs, thereby delaying fallback when required (#5620)v1.49.0
: Release 1.49.0Compare Source
New Features
GRPC_CONFIG_OBSERVABILITY_JSON
(#5525)Behavior Changes
Bug Fixes
nil
stats handler togrpc.WithStatsHandler
orgrpc.StatsHandler
(#5543)IDLE
overTRANSIENT_FAILURE
when aggregating connectivity state (#5473)GRPC_EXPERIMENTAL_ENABLE_OUTLIER_DETECTION
is set to true (#5537)v1.48.0
: Release 1.48.0Compare Source
Bug Fixes
New Features
v1.47.0
: Release 1.47.0Compare Source
New Features
Bug Fixes
Behavior Changes
Documentation
v1.46.2
Compare Source
Bug Fixes
v1.46.1
Compare Source
v1.46.0
: Release 1.46.0Compare Source
New Features
TCP_USER_TIMEOUT
ongrpc.Server
connections usingkeepalive.ServerParameters.Time
(#5219)ClientConn
by default (#5285)API Changes
WithBalancerName()
API, deprecated over 4 years ago in #1697 (#5232)Behavior Changes
TransientFailure
inpick_first
LB policy when all addresses are removed (#5274)Bug Fixes
Dependencies
v1.45.0
: Release 1.45.0Compare Source
Bug Fixes
Performance Improvements
Behavior Changes
Canceled
orDeadlineExceeded
), instead ofUnknown
(#5156)New Features
NewServer(ServerOptions)
for creating a reflection server with advanced customizations (#5197)v1.44.0
: Release 1.44.0Compare Source
New Features
Bug Fixes
Documentation
map
s) must implement Equal (#5109)Configuration
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