National Vulnerability Database

National Vulnerability Database

National Vulnerability
Database

CVE-2017-17688 Detail

Current Description

** DISPUTED ** 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.

Source:  MITRE
Description Last Modified:  05/16/2018
View Analysis Description

Impact

CVSS v3.0 Severity and Metrics:

Base Score: 5.9 MEDIUM
Vector: AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N (V3 legend)
Impact Score: 3.6
Exploitability Score: 2.2


Attack Vector (AV): Network
Attack Complexity (AC): High
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): None
Availability (A): None

CVSS v2.0 Severity and Metrics:

Base Score: 4.3 MEDIUM
Vector: (AV:N/AC:M/Au:N/C:P/I:N/A:N) (V2 legend)
Impact Subscore: 2.9
Exploitability Subscore: 8.6


Access Vector (AV): Network
Access Complexity (AC): Medium
Authentication (AU): None
Confidentiality (C): Partial
Integrity (I): None
Availability (A): None
Additional Information:
Allows unauthorized disclosure of information

References to Advisories, Solutions, and Tools

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Hyperlink Resource
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
http://www.securitytracker.com/id/1040904 Third Party Advisory VDB Entry
https://efail.de Exploit Mitigation Third Party Advisory
https://lists.gnupg.org/pipermail/gnupg-users/2018-May/060334.html Third Party Advisory
https://news.ycombinator.com/item?id=17066419 Issue Tracking Third Party Advisory
https://protonmail.com/blog/pgp-vulnerability-efail Issue Tracking Third Party Advisory
https://twitter.com/matthew_d_green/status/995996706457243648 Third Party Advisory
https://www.patreon.com/posts/cybersecurity-15-18814817 Issue Tracking Third Party Advisory
https://www.synology.com/support/security/Synology_SA_18_22 Third Party Advisory

Technical Details

Vulnerability Type (View All)

Change History

2 change records found - show changes

Quick Info

CVE Dictionary Entry:
CVE-2017-17688
NVD Published Date:
05/16/2018
NVD Last Modified:
06/27/2018