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Date: Sat, 8 Aug 2020 14:17:04 -0400
From: Jeffrey Walton <>
To: Bastian Blank <>
Subject: Re: Voiding CVE-2020-16248

On Sat, Aug 8, 2020 at 1:46 PM Bastian Blank <> wrote:
> Hi Richard
> On Sat, Aug 08, 2020 at 10:49:14AM +0200, Richard Hartmann wrote:
> > the Prometheus project[1] has received a public "vulnerability"
> > report[2] against what the reporter called SSRF, but what is the core
> > functionality of blackbox_exporter[3]: The ability to trigger network
> > probes over the network to monitor a target's availability.
> Could you please explain yourself why you think this is not a
> vulnerability?  Even wanted functuality can constitute a vulnerability
> if looked on closer.
> The software allows to send pre-defined requests to arbitrary targets
> and extract at least parts of the response.  This is a typical SSRF.
> Would you require to specify the allowed targets, noone would ask.

ICMP and the root user requirement makes blackbox_exporter a good target.

It also looks like a confused deputy to me, which also makes it a
privilege escalation.

Naively, it looks like a feature that provides an attacker
reconnaissance capabilities and allows network enumeration.


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