CVE-2021-29622

Arbitrary redirects under /new endpoint

Description

Prometheus is an open-source monitoring system and time series database. In 2.23.0, Prometheus changed its default UI to the New ui. To ensure a seamless transition, the URL's prefixed by /new redirect to /. Due to a bug in the code, it is possible for an attacker to craft an URL that can redirect to any other URL, in the /new endpoint. If a user visits a prometheus server with a specially crafted address, they can be redirected to an arbitrary URL. The issue was patched in the 2.26.1 and 2.27.1 releases. In 2.28.0, the /new endpoint will be removed completely. The workaround is to disable access to /new via a reverse proxy in front of Prometheus.

Category

6.5
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 86.63% Top 5%
Third-Party Advisory github.com Third-Party Advisory github.com Third-Party Advisory github.com
Affected: prometheus prometheus
Published at:
Updated at:

References

Link Tags
https://github.com/prometheus/prometheus/security/advisories/GHSA-vx57-7f4q-fpc7 third party advisory
https://github.com/prometheus/prometheus/releases/tag/v2.26.1 third party advisory
https://github.com/prometheus/prometheus/releases/tag/v2.27.1 third party advisory

Frequently Asked Questions

What is the severity of CVE-2021-29622?
CVE-2021-29622 has been scored as a medium severity vulnerability.
How to fix CVE-2021-29622?
To fix CVE-2021-29622, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-29622 being actively exploited in the wild?
It is possible that CVE-2021-29622 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~87% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-29622?
CVE-2021-29622 affects prometheus prometheus.
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