Arbitrary redirects under /new endpoint
CVE-2021-29622

6.5MEDIUM

Key Information:

Vendor

Prometheus

Status
Prometheus
Vendor
CVE Published:
19 May 2021

What is CVE-2021-29622?

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.

Affected Version(s)

prometheus >= 2.23.0, < 2.27.1

References

https://github.com/prometheus/prometheus/security/advisor...
x_refsource_CONFIRM
https://github.com/prometheus/prometheus/releases/tag/v2....
x_refsource_MISC
https://github.com/prometheus/prometheus/releases/tag/v2....
x_refsource_MISC

EPSS Score

86% chance of being exploited in the next 30 days.

CVSS V3.1

Score:
6.5
Severity:
MEDIUM
Confidentiality:
None
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.