CVE-2017-17689

Public Exploit

Description

The S/MIME specification allows a Cipher Block Chaining (CBC) malleability-gadget attack that can indirectly lead to plaintext exfiltration, aka EFAIL.

5.9

CVSS

Severity: Medium

CVSS 3.0 •

CVSS 2.0 •

EPSS 0.55%

Third-Party Advisory securityfocus.com Third-Party Advisory efail.de Third-Party Advisory ycombinator.com Third-Party Advisory pastebin.com Third-Party Advisory twitter.com Third-Party Advisory synology.com

Affected: n/a n/a

References

Link	Tags
https://news.ycombinator.com/item?id=17066419	issue tracking third party advisory
https://pastebin.com/gNCc8aYm	third party advisory
http://www.securityfocus.com/bid/104165	vdb entry third party advisory
https://twitter.com/matthew_d_green/status/996371541591019520	third party advisory
https://efail.de	exploit third party advisory mitigation
https://www.synology.com/support/security/Synology_SA_18_22	third party advisory

Frequently Asked Questions

What is the severity of CVE-2017-17689?: CVE-2017-17689 has been scored as a medium severity vulnerability.
How to fix CVE-2017-17689?: To fix CVE-2017-17689, 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-2017-17689 being actively exploited in the wild?: It is possible that CVE-2017-17689 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.

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