The S/MIME specification allows a Cipher Block Chaining (CBC) malleability-gadget attack…
Priority LOW 33Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- High
- Impact type
- —
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- Will not fix Red Hat: no fix planned
Attack profile from CVSS 3.0 · NVD. Fix status from CNA and Red Hat.
Summary
The S/MIME specification allows a Cipher Block Chaining (CBC) malleability-gadget attack that can indirectly lead to plaintext exfiltration, aka EFAIL.
Why it matters now
EPSS 0.04144 90th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Will not fix Red Hat: no fix planned
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 21
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:9folders:nine:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | 9folders |
| cpe:2.3:a:apple:mail:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Apple |
| cpe:2.3:a:apple:mail:-:*:*:*:*:iphone_os:*:* | not specified by NVD | Vulnerable | Apple |
| cpe:2.3:a:bloop:airmail:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Bloop |
| cpe:2.3:a:emclient:emclient:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Emclient |
| cpe:2.3:a:flipdogsolutions:maildroid:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Flipdogsolutions |
| cpe:2.3:a:freron:mailmate:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Freron |
| cpe:2.3:a:gnome:evolution:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | GNOME |
| cpe:2.3:a:google:gmail:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | |
| cpe:2.3:a:horde:horde_imp:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Horde |
- cpe:2.3:a:9folders:nine:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·9folders
- cpe:2.3:a:apple:mail:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Apple
- cpe:2.3:a:apple:mail:-:*:*:*:*:iphone_os:*:* Versions not specified by NVD Vulnerable ·Apple
- cpe:2.3:a:bloop:airmail:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Bloop
- cpe:2.3:a:emclient:emclient:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Emclient
- cpe:2.3:a:flipdogsolutions:maildroid:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Flipdogsolutions
- cpe:2.3:a:freron:mailmate:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Freron
- cpe:2.3:a:gnome:evolution:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·GNOME
- cpe:2.3:a:google:gmail:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Google
- cpe:2.3:a:horde:horde_imp:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Horde
Show 11 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:ibm:notes:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | IBM |
| cpe:2.3:a:kde:kmail:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | KDE |
| cpe:2.3:a:kde:trojita:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | KDE |
| cpe:2.3:a:microsoft:outlook:2007:*:*:*:*:*:*:* | 2007 | Vulnerable | Microsoft |
| cpe:2.3:a:microsoft:outlook:2010:*:*:*:*:*:*:* | 2010 | Vulnerable | Microsoft |
| cpe:2.3:a:microsoft:outlook:2013:*:*:*:*:*:*:* | 2013 | Vulnerable | Microsoft |
| cpe:2.3:a:microsoft:outlook:2016:*:*:*:*:*:*:* | 2016 | Vulnerable | Microsoft |
| cpe:2.3:a:mozilla:thunderbird:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Mozilla |
| cpe:2.3:a:postbox-inc:postbox:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Postbox |
| cpe:2.3:a:r2mail2:r2mail2:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | R2mail2 |
| cpe:2.3:a:ritlabs:the_bat:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | maximmasiutin |
- cpe:2.3:a:ibm:notes:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·IBM
- cpe:2.3:a:kde:kmail:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·KDE
- cpe:2.3:a:kde:trojita:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·KDE
- cpe:2.3:a:microsoft:outlook:2007:*:*:*:*:*:*:* Versions 2007 Vulnerable ·Microsoft
- cpe:2.3:a:microsoft:outlook:2010:*:*:*:*:*:*:* Versions 2010 Vulnerable ·Microsoft
- cpe:2.3:a:microsoft:outlook:2013:*:*:*:*:*:*:* Versions 2013 Vulnerable ·Microsoft
- cpe:2.3:a:microsoft:outlook:2016:*:*:*:*:*:*:* Versions 2016 Vulnerable ·Microsoft
- cpe:2.3:a:mozilla:thunderbird:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Mozilla
- cpe:2.3:a:postbox-inc:postbox:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Postbox
- cpe:2.3:a:r2mail2:r2mail2:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·R2mail2
- cpe:2.3:a:ritlabs:the_bat:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·maximmasiutin
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Will not fix |
| Red Hat Enterprise Linux 7 | Affected | No fix planned: Will not fix |
Not affected: 3 products
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
Timeline
- 2026-10-02 Threatist record created from CVE-2017-17689
- 2026-10-03 Alias added: GHSA-xv45-9768-g2mm
References
Sources
- CVE-2017-17689 · CVE Program
- CVE-2017-17689 · NVD
- FIRST EPSS
- GHSA-xv45-9768-g2mm · GitHub Advisory Database · CC BY 4.0
- CVE-2017-17689 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences