Home/CVE/The OpenPGP specification allows a Cipher Feedback Mode (CFB) malleability-gadget attack that can indirectly lead to pla
CVE

CVE-2017-17688

The OpenPGP specification allows a Cipher Feedback Mode (CFB) malleability-gadget attack that can indirectly lead to pla

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.

MEDIUM · CVSS 5.9 EPSS 0.02845
Schedule remediation
  • Public exploit or PoC is available
Sigma rules8 YARA rules0
▤

Affected Products & Versions

11
apple mailall versions
bloop airmailall versions
emclientall versions
flipdogsolutions maildroidall versions
freron mailmateall versions
horde impall versions
microsoft outlookall versions
mozilla thunderbirdall versions
⚠

Public Exploits & PoCs

1
pocefail.deefail.de
◈

Sigma Hunt Rules

8
Exact rules name this CVE ID. Product rules name an affected product in their title. Related rules cover techniques used by actors who exploited this CVE. Showing the most relevant matches; the complete related set is on the full drill-down.
producthighSuspicious File Created in Outlook Temporary Directory
producthighSuspicious Outlook Macro Created
producthighPotential Persistence Via Outlook Form
producthighSuspicious Execution From Outlook Temporary Folder
producthighSuspicious Remote Child Process From Outlook
producthighSuspicious Outlook Child Process
▣

Scoring & Timeline

5.9
MEDIUM · CVSS v3.0 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD16 May 2018 · 07:29 PM
CVSS VectorCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
⚑

Vendor Advisories

3
suse-csafopenSUSE-SU-2024:10736-1
suse-csafopenSUSE-SU-2018:1329-1
suse-csafopenSUSE-SU-2018:1330-1
🔗

References & Sources

9
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://flaked.sockpuppet.org/2018/05/16/a-unified-timeline.htmlThird Party Advisory
http://www.securityfocus.com/bid/104162Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1040904Third Party AdvisoryVDB Entry
https://lists.gnupg.org/pipermail/gnupg-users/2018-May/060334.htmlThird Party Advisory
https://news.ycombinator.com/item?id=17066419Issue TrackingThird Party Advisory
https://protonmail.com/blog/pgp-vulnerability-efailIssue TrackingThird Party Advisory
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