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Go SDK for CloudEvents's use of WithRoundTripper to create a Client leaks credentials

Moderate severity GitHub Reviewed Published Mar 6, 2024 in cloudevents/sdk-go • Updated Mar 12, 2024

Package

gomod github.com/cloudevents/sdk-go/v2 (Go)

Affected versions

<= 2.15.1

Patched versions

2.15.2

Description

Impact

What kind of vulnerability is it? Who is impacted?
Using cloudevents.WithRoundTripper to create a cloudevents.Client with an authenticated http.RoundTripper causes the go-sdk to leak credentials to arbitrary endpoints.

The relevant code is here (also inline, emphasis added):

if p.Client == nil {
  p.Client = **http.DefaultClient**
}

if p.roundTripper != nil {
  p.Client.**Transport = p.roundTripper**
}

When the transport is populated with an authenticated transport such as:

... then http.DefaultClient is modified with the authenticated transport and will start to send Authorization tokens to
any endpoint it is used to contact!

Found and patched by: @tcnghia and @mattmoor

Patches

v.2.15.2

References

@duglin duglin published to cloudevents/sdk-go Mar 6, 2024
Published to the GitHub Advisory Database Mar 6, 2024
Reviewed Mar 6, 2024
Published by the National Vulnerability Database Mar 6, 2024
Last updated Mar 12, 2024

Severity

Moderate

EPSS score

0.045%
(17th percentile)

Weaknesses

No CWEs

CVE ID

CVE-2024-28110

GHSA ID

GHSA-5pf6-2qwx-pxm2

Source code

Credits

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