CVE-2022-46146: Prometheus Exporter Toolkit vulnerable to basic authentication bypass
First published: Tue Nov 29 2022(Updated: )
### Impact Prometheus and its exporters 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 The exporter-toolkit v0.7.3 and v0.8.2 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 reporting this security issue.
Credit: security-advisories@github.com security-advisories@github.com security-advisories@github.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| go/github.com/prometheus/exporter-toolkit | <0.7.2 | 0.7.2 |
| go/github.com/prometheus/exporter-toolkit | >=0.8.0<0.8.2 | 0.8.2 |
| <0.7.2 | ||
| >=0.8.0<0.8.2 | ||
| Prometheus Exporter Toolkit | <0.7.2 | |
| Prometheus Exporter Toolkit | >=0.8.0<0.8.2 | |
| redhat/exporter-toolkit | <0.7.2 | 0.7.2 |
| redhat/exporter-toolkit | <0.8.2 | 0.8.2 |
Remedy
https://github.com/prometheus/exporter-toolkit/commit/5b1eab34484ddd353986bce736cd119d863e4ff5
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Reference Links
- https://github.com/prometheus/exporter-toolkit/security/advisories/GHSA-7rg2-cxvp-9p7p
- https://nvd.nist.gov/vuln/detail/CVE-2022-46146
- https://github.com/prometheus/exporter-toolkit/commit/5b1eab34484ddd353986bce736cd119d863e4ff5
- http://www.openwall.com/lists/oss-security/2022/11/29/1
- http://www.openwall.com/lists/oss-security/2022/11/29/2
- http://www.openwall.com/lists/oss-security/2022/11/29/4
- https://github.com/prometheus/exporter-toolkit/commit/25288779bc59d00c41b4a1706c6b87f0561ef2d7
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/JRSHISR64L6QGSMDFZDNPHHIXSCAKK26/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UH24VXIB25OGHF4VGY4PLZMTGTI3BHCA/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ULVDTAI76VATRAHTKCE2SUJ4NC3PQZ6Y/
- https://github.com/advisories/GHSA-7rg2-cxvp-9p7p (Advisory)
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ULVDTAI76VATRAHTKCE2SUJ4NC3PQZ6Y/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JRSHISR64L6QGSMDFZDNPHHIXSCAKK26/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UH24VXIB25OGHF4VGY4PLZMTGTI3BHCA/
- https://security.gentoo.org/glsa/202401-15
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2149437
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2149439
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2149440
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2149438
- https://access.redhat.com/errata/RHSA-2023:2110
- https://access.redhat.com/errata/RHSA-2023:1326
- https://access.redhat.com/security/cve/cve-2022-46146
- https://access.redhat.com/errata/RHSA-2023:5001
- https://bugzilla.redhat.com/show_bug.cgi?id=2149436
- https://www.cve.org/CVERecord?id=CVE-2022-46146 https://nvd.nist.gov/vuln/detail/CVE-2022-46146 http://www.openwall.com/lists/oss-security/2022/11/29/1 http://www.openwall.com/lists/oss-security/2022/11/29/2 https://github.com/prometheus/exporter-toolkit/commit/5b1eab34484ddd353986bce736cd119d863e4ff5 https://github.com/prometheus/exporter-toolkit/security/advisories/GHSA-7rg2-cxvp-9p7p
Parent vulnerabilities
(Appears in the following advisories)
Frequently Asked Questions
What is CVE-2022-46146?
CVE-2022-46146 is a vulnerability in the Prometheus Exporter Toolkit that allows an attacker to forge a request and poison the internal cache.
How does CVE-2022-46146 affect the software?
CVE-2022-46146 affects exporter-toolkit versions up to 0.7.2 and 0.8.2.
What is the severity of CVE-2022-46146?
CVE-2022-46146 has a severity score of 8.8 (high).
How can I fix CVE-2022-46146?
To fix CVE-2022-46146, update exporter-toolkit to version 0.7.2 or 0.8.2, depending on the affected version.
Where can I find more information about CVE-2022-46146?
You can find more information about CVE-2022-46146 in the following references: [Reference 1](https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2149437), [Reference 2](https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2149439), [Reference 3](https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2149440).
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