GHSA-4v48-4q5m-8vx4
Suggest an improvement- Source
- https://github.com/advisories/GHSA-4v48-4q5m-8vx4
- Import Source
- https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2022/12/GHSA-4v48-4q5m-8vx4/GHSA-4v48-4q5m-8vx4.json
- JSON Data
- https://api.osv.dev/v1/vulns/GHSA-4v48-4q5m-8vx4
- Published
- 2022-12-05T22:01:08Z
- Modified
- 2026-04-15T21:19:00Z
- Severity
-
- 7.2 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
- Summary
- Prometheus vulnerable to basic authentication bypass
- Details
-
Impact
Prometheus can be secured by a web.yml file that specifies usernames and hashed passwords for basic authentication.
Passwords are hashed with bcrypt, which means that even if you have access to the hash, it is very hard to find the original password back.
However, a flaw in the way this mechanism was implemented in the exporter toolkit makes it possible with people who know the hashed password to authenticate against Prometheus.
A request can be forged by an attacker to poison the internal cache used to cache the computation of hashes and make subsequent requests successful. This cache is used in both happy and unhappy scenarios in order to limit side channel attacks that could tell an attacker if a user is present in the file or not.
Patches
Prometheus 2.37.4 (LTS) and 2.40.4 have been released to address this issue.
Workarounds
There is no workaround but attacker must have access to the hashed password, stored in disk, to bypass the authentication.
Credit
We want to thank Lei Wan for reporting this security issue.
- Database specific
{ "cwe_ids": [ "CWE-303" ], "github_reviewed": true, "github_reviewed_at": "2022-12-05T22:01:08Z", "nvd_published_at": null, "severity": "HIGH" }- References
-
- https://github.com/prometheus/prometheus/security/advisories/GHSA-4v48-4q5m-8vx4
- https://github.com/prometheus/prometheus/commit/31a2db3ae9c0f4b486b6895973beabc1d1beac93
- https://github.com/prometheus/prometheus/releases/tag/v2.37.4
- https://github.com/prometheus/prometheus/releases/tag/v2.40.4
- github.com/prometheus/prometheus
Affected packages
Go
github.com/prometheus/prometheus
Package
- Name
- github.com/prometheus/prometheus
- View open source insights on deps.dev
- Purl
- pkg:golang/github.com/prometheus/prometheus
github.com/prometheus/prometheus
Package
- Name
- github.com/prometheus/prometheus
- View open source insights on deps.dev
- Purl
- pkg:golang/github.com/prometheus/prometheus
github.com/prometheus/prometheus/v2
Package
- Name
- github.com/prometheus/prometheus/v2
- View open source insights on deps.dev
- Purl
- pkg:golang/github.com/prometheus/prometheus/v2
github.com/prometheus/prometheus/v2
Package
- Name
- github.com/prometheus/prometheus/v2
- View open source insights on deps.dev
- Purl
- pkg:golang/github.com/prometheus/prometheus/v2