7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.1 High
AI Score
Confidence
Low
0.001 Low
EPSS
Percentile
38.0%
The grpc Unary Server Interceptor opentelemetry-go-contrib/instrumentation/google.golang.org/grpc/otelgrpc/interceptor.go
// UnaryServerInterceptor returns a grpc.UnaryServerInterceptor suitable
// for use in a grpc.NewServer call.
func UnaryServerInterceptor(opts ...Option) grpc.UnaryServerInterceptor {
out of the box adds labels
net.peer.sock.addr
net.peer.sock.port
that have unbound cardinality. It leads to the server’s potential memory exhaustion when many malicious requests are sent.
An attacker can easily flood the peer address and port for requests.
Apply the attached patch to the example and run the client multiple times. Observe how each request will create a unique histogram and how the memory consumption increases during it.
In order to be affected, the program has to configure a metrics pipeline, use UnaryServerInterceptor, and does not filter any client IP address and ports via middleware or proxies, etc.
It is similar to already reported vulnerabilities.
As a workaround to stop being affected, a view removing the attributes can be used.
The other possibility is to disable grpc metrics instrumentation by passing otelgrpc.WithMeterProvider
option with noop.NewMeterProvider
.
In PR #4322, to be released with v0.46.0, the attributes were removed.
CPE | Name | Operator | Version |
---|---|---|---|
go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc | lt | 0.46.0 |
github.com/open-telemetry/opentelemetry-go-contrib
github.com/open-telemetry/opentelemetry-go-contrib/blob/9d4eb7e7706038b07d33f83f76afbe13f53d171d/instrumentation/google.golang.org/grpc/otelgrpc/interceptor.go#L327
github.com/open-telemetry/opentelemetry-go-contrib/blob/instrumentation/google.golang.org/grpc/otelgrpc/v0.45.0/instrumentation/google.golang.org/grpc/otelgrpc/config.go#L138
github.com/open-telemetry/opentelemetry-go-contrib/commit/b44dfc9092b157625a5815cb437583cee663333b
github.com/open-telemetry/opentelemetry-go-contrib/pull/4322
github.com/open-telemetry/opentelemetry-go-contrib/security/advisories/GHSA-8pgv-569h-w5rw
nvd.nist.gov/vuln/detail/CVE-2023-47108
pkg.go.dev/go.opentelemetry.io/otel/metric/noop#NewMeterProvider
7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.1 High
AI Score
Confidence
Low
0.001 Low
EPSS
Percentile
38.0%