Impact

send_email in graphite-web/webapp/graphite/composer/views.py in Graphite through 1.1.5 is vulnerable to SSRF. The vulnerable SSRF endpoint can be used by an attacker to have the Graphite web server request any resource. The response to this SSRF request is encoded into an image file and then sent to an e-mail address that can be supplied by the attacker. Thus, an attacker can exfiltrate any information. Email will be send through SMTP server configured in Graphite, by default it's 'localhost'

Patches

Problem was patched in Graphite-web 1.1.6. Also patches was released for graphite-web 1.0.x and 0.9.x, and we'll discuss releases of non-supported branches later.

Workarounds

You can manually remove function send_email from file webapp/graphite/composer/views.py. This function are not in use and will not affect your Graphite installation.

References

For more information check this graphite-web Github issue #2008

For more information

If you have any questions or comments about this advisory:

• Add comment in issue #2008

References

• GHSA-vfj6-275q-4pvm
• graphite-project/graphite-web#2008
• graphite-project/graphite-web#2499
• graphite-project/graphite-web@71726a0
• https://nvd.nist.gov/vuln/detail/CVE-2017-18638
• https://blog.orange.tw/2017/07/how-i-chained-4-vulnerabilities-on.html#second-bug-internal-graphite-ssrf
• https://lists.debian.org/debian-lts-announce/2019/10/msg00030.html
• https://www.youtube.com/watch?v=ds4Gp4xoaeA