CVE-2021-29622 - CVE House

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Status published Medium CVE-2021-29622

Arbitrary redirects under /new endpoint

6.5 CVSS

Vulnerability 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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

No credits recorded in the NVD database.

References

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Affected Vendor

prometheus

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Affected Software

prometheus

Vulnerable Versions:

>= 2.23.0, < 2.27.1

Timeline

Official Publish: May 19th, 2021

Last Modified: August 3rd, 2024

Added to House: July 21st, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

Weaknesses (CWE)

MITRE ATT&CK TTPs

T1204 User Execution

T1071 Application Layer Protocol

Command and Control

T1189 Drive-by Compromise

T1036 Masquerading

Defense Evasion