CVE-2024-28110 – github.com/cloudevents/sdk-go/v2

Package

Manager: go
Name: github.com/cloudevents/sdk-go/v2
Vulnerable Version: >=0 <2.15.2

Severity

Level: Medium

CVSS v3.1: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C

CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

EPSS: 0.00067 pctl0.21017

Details

Go SDK for CloudEvents's use of WithRoundTripper to create a Client leaks credentials ### 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](https://github.com/cloudevents/sdk-go/blob/67e389964131d55d65cd14b4eb32d57a47312695/v2/protocol/http/protocol.go#L104-L110) (also inline, emphasis added): <pre>if p.Client == nil { p.Client = **http.DefaultClient** } if p.roundTripper != nil { p.Client.**Transport = p.roundTripper** } </pre> When the transport is populated with an authenticated transport such as: - [oauth2.Transport](https://pkg.go.dev/golang.org/x/oauth2#Transport) - [idtoken.NewClient(...).Transport](https://pkg.go.dev/google.golang.org/api/idtoken#NewClient) ... 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

Metadata

Created: 2024-03-06T20:11:59Z
Modified: 2024-03-12T15:22:22Z
Source: https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2024/03/GHSA-5pf6-2qwx-pxm2/GHSA-5pf6-2qwx-pxm2.json
CWE IDs: []
Alternative ID: GHSA-5pf6-2qwx-pxm2
Finding: F017
Auto approve: 1