8.8 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
0.007 Low
EPSS
Percentile
80.2%
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.
The exporter-toolkit v0.7.3 and v0.8.2 have been released to address this issue.
There is no workaround but attacker must have access to the hashed password, stored in disk, to bypass the authentication.
We want to thank Lei Wan reporting this security issue.
CPE | Name | Operator | Version |
---|---|---|---|
github.com/prometheus/exporter-toolkit | lt | 0.7.2 | |
github.com/prometheus/exporter-toolkit | lt | 0.8.2 |
www.openwall.com/lists/oss-security/2022/11/29/1
www.openwall.com/lists/oss-security/2022/11/29/2
www.openwall.com/lists/oss-security/2022/11/29/4
github.com/advisories/GHSA-7rg2-cxvp-9p7p
github.com/prometheus/exporter-toolkit/commit/25288779bc59d00c41b4a1706c6b87f0561ef2d7
github.com/prometheus/exporter-toolkit/commit/5b1eab34484ddd353986bce736cd119d863e4ff5
github.com/prometheus/exporter-toolkit/security/advisories/GHSA-7rg2-cxvp-9p7p
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JRSHISR64L6QGSMDFZDNPHHIXSCAKK26/
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UH24VXIB25OGHF4VGY4PLZMTGTI3BHCA/
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ULVDTAI76VATRAHTKCE2SUJ4NC3PQZ6Y/
lists.fedoraproject.org/archives/list/[email protected]/message/JRSHISR64L6QGSMDFZDNPHHIXSCAKK26/
lists.fedoraproject.org/archives/list/[email protected]/message/UH24VXIB25OGHF4VGY4PLZMTGTI3BHCA/
lists.fedoraproject.org/archives/list/[email protected]/message/ULVDTAI76VATRAHTKCE2SUJ4NC3PQZ6Y/
nvd.nist.gov/vuln/detail/CVE-2022-46146
security.gentoo.org/glsa/202401-15