Grafana 6.7.4 and 7.0.2 released with important security fix

Published: 3 Jun 2020 RSS

Today we are releasing Grafana 6.7.4 and 7.0.2. These patch releases include an important security fix for an issue that affects all Grafana versions from 3.0.1 to 7.0.1.

Notice: 2020-06-04 06:21 UTC we removed the part of the timeline that indicated that this is an RCE vulnerability. While SSRF can be very similar to RCE, this exploit does not enable the attacker to execute any code beyond creating the request.

- Categorized as a HIGH risk vulnerability because it’s a remote code execution (RCE) vulnerability that affects all Grafana instances[...]
+ Categorized as a HIGH risk vulnerability because it’s a SSRF without authentication requirement that affects all Grafana instances[...]

Notice: 2020-06-09 10:00 UTC we add a note that the same exploit could also be abused to DOS a Grafana instance by segfaulting it.

+ Furthermore, passing invalid URL objects could be used for DOS'ing Grafana via SegFault.

Latest stable release in 7.x:

Latest stable release in 6.x:

Incorrect access control vulnerability (CVE-2020-13379)

We received a security report to security@grafana.com on May 14, 2020, about a vulnerability in Grafana regarding the avatar feature. It was later identified as affecting Grafana versions from 3.0.1 to 7.0.1. CVE-2020-13379 has been assigned to this vulnerability.

The avatar feature in Grafana 3.0.1 through 7.0.1 has an SSRF Incorrect Access Control issue. This vulnerability allows any unauthenticated user/client to make Grafana send HTTP requests to any URL and return its result to the user/client. This can be used to gain information about the network that Grafana is running on. Furthermore, passing invalid URL objects could be used for DOS’ing Grafana via SegFault.

If for some reason you cannot upgrade, the impact can be mitigated by blocking access to the avatar feature by blocking the /avatar/* URL via a web application firewall, load balancer, reverse proxy, or similar. It can also be mitigated by restricting access to Grafana.

Affected versions

Grafana releases 3.0.1 through 7.0.1

Patched versions

7.x and 6.7.x

Solutions and mitigations

Download and install the appropriate patch for your version of Grafana.

Grafana Cloud instances have already been patched, and Grafana Enterprise customers were provided with updated binaries, under embargo, on May 27.

Timeline and postmortem

Here is a detailed timeline starting from when we originally learned of the issue. All times in UTC.

May 14, 2020

  • 14:10: Received vulnerability report sent to security@grafana.com by Justin Gardner @rhynorater.
  • 22:15: Escalated to Grafana devs who decrypted the message.

May 15, 2020

  • 13:21: Report confirmed valid; the issue could be reproduced on Grafana v3.0.1 to v7.0.1. Categorized as a HIGH risk vulnerability because it’s a SSRF without authentication requirement that affects all Grafana instances, especially those that are exposed to the internet, since anyone who can access the Grafana instance can exploit this vulnerability.
  • 14:30: A release plan was established.

May 19, 2020

  • 15:03: Marcus Efraimsson (@marefr) started working on a fix for the vulnerability in a private mirror.
  • 15:33: Responded to the reporter with confirmation and some notes about what is going to happen next.

May 20, 2020

  • 13:55: Requested a new CVE ID for the vulnerability.

May 22, 2020

May 27, 2020

  • 10:34: Built 7.0.2 with a fix for the vulnerability from our private mirror.
  • 15:40: Built 6.7.4 with a fix for the vulnerability from our private mirror.

May 28, 2020

  • 08:00: Proactively provided Grafana Enterprise customers and partners with details and links to patched versions under embargo.
  • 08:00: Started rolling out patched versions to Grafana Cloud.

June 3, 2020

  • 12:00: Released 7.0.2 and 6.7.4 on grafana.com
  • 12:00: Published this blog post
  • 12:00: The patch will be merged from our private mirror into Grafana master.

Reporting security issues

If you think you have found a security vulnerability, please send a report to security@grafana.com. This address can be used for all of Grafana Labs’s open source and commercial products (including but not limited to Grafana, Grafana Cloud, Grafana Enterprise, and grafana.com). We only accept vulnerability reports at this address. We would prefer that you encrypt your message to us using our PGP key. The key fingerprint is:

F988 7BEA 027A 049F AE8E 5CAA D125 8932 BE24 C5CA

The key is available from keys.gnupg.net by searching for [security@grafana](http://keys.gnupg.net/pks/lookup?search=security@grafana&fingerprint=on&op=index.

Security announcements

We maintain a category on the community site named Security Announcements, where we will post a summary, remediation, and mitigation details for any patch containing security fixes. You can also subscribe to email updates to this category if you have a grafana.com account and sign in to the community site, or via updates from our Security Announcements RSS feed.

Conclusion

If you run a Grafana instance from version 3.0.1 to 7.0.1, please upgrade to Grafana 6.7.4 or 7.0.2 as soon as possible.

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