Prometheus through 3.15.1 contains a credential leak vulnerability that allows attackers to capture Azure AD or Google IAM bearer tokens by redirecting remote_write requests to another host. Attackers controlling the remote-write endpoint or a redirecting server can return a 3xx to their host and replay the token, for example to write metrics to the victim's backend.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
High
Difficult to exploit
Attack Requirements
Present
Additional conditions required
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
Low
Partial data leak
Integrity
Low
Partial data modification
Availability
None
No disruption
CVSS Vector v4.0
Weakness Type (CWE)
Vulnerable Products 1
| Configuration | From (including) | Up to (excluding) |
|---|---|---|
|
Prometheus Prometheus
cpe:2.3:a:prometheus:prometheus:*:*:*:*:*:*:*:*
|
— |
<= 3.15.1
|
References 6
https://abraxaslabs.tech/research/prometheus-bearer-redirect
disclosure@vulncheck.com
https://github.com/prometheus/common/pull/901
disclosure@vulncheck.com
https://github.com/prometheus/prometheus
disclosure@vulncheck.com
https://github.com/prometheus/prometheus/blob/v3.15.1/storage/remote/azuread/az…
disclosure@vulncheck.com
https://github.com/prometheus/prometheus/blob/v3.15.1/storage/remote/client.go#…
disclosure@vulncheck.com
https://www.vulncheck.com/advisories/prometheus-through-3.15.1-credential-leak-…
disclosure@vulncheck.com