CVE-2017-17688

Public Exploit

Description

The OpenPGP specification allows a Cipher Feedback Mode (CFB) malleability-gadget attack that can indirectly lead to plaintext exfiltration, aka EFAIL. NOTE: third parties report that this is a problem in applications that mishandle the Modification Detection Code (MDC) feature or accept an obsolete packet type, not a problem in the OpenPGP specification

5.9

CVSS

Severity: Medium

CVSS 3.0 •

CVSS 2.0 •

EPSS 1.65% Top 20%

Third-Party Advisory sockpuppet.org Third-Party Advisory securityfocus.com Third-Party Advisory securitytracker.com Third-Party Advisory efail.de Third-Party Advisory gnupg.org Third-Party Advisory ycombinator.com Third-Party Advisory protonmail.com Third-Party Advisory twitter.com Third-Party Advisory patreon.com Third-Party Advisory synology.com

Affected: n/a n/a

References

Link	Tags
https://protonmail.com/blog/pgp-vulnerability-efail	third party advisory issue tracking
https://news.ycombinator.com/item?id=17066419	third party advisory issue tracking
https://www.patreon.com/posts/cybersecurity-15-18814817	third party advisory issue tracking
http://flaked.sockpuppet.org/2018/05/16/a-unified-timeline.html	third party advisory
http://www.securityfocus.com/bid/104162	third party advisory vdb entry
https://lists.gnupg.org/pipermail/gnupg-users/2018-May/060334.html	third party advisory
https://efail.de	mitigation third party advisory exploit
https://twitter.com/matthew_d_green/status/995996706457243648	third party advisory
https://www.synology.com/support/security/Synology_SA_18_22	third party advisory
http://www.securitytracker.com/id/1040904	third party advisory vdb entry

Frequently Asked Questions

What is the severity of CVE-2017-17688?: CVE-2017-17688 has been scored as a medium severity vulnerability.
How to fix CVE-2017-17688?: To fix CVE-2017-17688, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2017-17688 being actively exploited in the wild?: It is possible that CVE-2017-17688 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~2% probability that this vulnerability will be exploited by malicious actors in the next 30 days.