Medium severity · published May 16, 2018
CVE-2017-17689
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
4.1%
EPSS
No
On KEV
Description
The S/MIME specification allows a Cipher Block Chaining (CBC) malleability-gadget attack that can indirectly lead to plaintext exfiltration, aka EFAIL.
CVSS vector
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)4.1% · higher than 91% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
OU
Outlook · Microsoft
2007; 2010; 2013; 2016 · source: NVD
AI
Airmail · Bloop
All versions, or not specified · source: NVD
EM
Emclient · Emclient
All versions, or not specified · source: NVD
EV
Evolution · Gnome
All versions, or not specified · source: NVD
GM
Gmail · Google
All versions, or not specified · source: NVD
HI
Horde Imp · Horde
All versions, or not specified · source: NVD
KM
Kmail · Kde
All versions, or not specified · source: NVD
MA
Mail · Apple
All versions, or not specified · source: NVD
MA
Maildroid · Flipdogsolutions
All versions, or not specified · source: NVD
MA
Mailmate · Freron
All versions, or not specified · source: NVD
NI
Nine · 9folders
All versions, or not specified · source: NVD
NO
Notes · Ibm
All versions, or not specified · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2017-17689
CVE.org
https://www.cve.org/CVERecord?id=CVE-2017-17689
Third Party Advisory
http://www.securityfocus.com/bid/104165
Exploit
https://efail.de
Issue Tracking
https://news.ycombinator.com/item?id=17066419
Third Party Advisory
https://pastebin.com/gNCc8aYm
Third Party Advisory
https://twitter.com/matthew_d_green/status/996371541591019520
Third Party Advisory
https://www.synology.com/support/security/Synology_SA_18_22
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