ArchLinux: 202105-25: prometheus: open redirect
Summary
A security issue has been found in Prometheus before version 2.27.1. 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
(e.g.
Note: Users who use a --web.external-url= flag with a path (e.g.
--web.external-url=) are not affected.
Resolution
Upgrade to 2.27.1-1.
# pacman -Syu "prometheus>=2.27.1-1"
The problem has been fixed upstream in version 2.27.1.
References
https://github.com/prometheus/prometheus/security/advisories/GHSA-vx57-7f4q-fpc7 https://github.com/prometheus/prometheus/commit/db7f0bcec27bd8aeebad6b08ac849516efa9ae02 https://security.archlinux.org/CVE-2021-29622
Workaround
The issue can be mitigated by using the --web.external-url= flag with apath (e.g. --web.external-url=).