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TI-2017-12945 Aliases CVE-2017-17688GHSA-87q6-mg5f-mp98

The OpenPGP specification allows a Cipher Feedback Mode (CFB) malleability-gadget attack…

Priority LOW 35Published · 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
No fix listed

Attack profile from CVSS 3.0 · NVD. Fix status from CNA.

Summary

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

Why it matters now

EPSS 0.05443 92nd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 12

CPEVersionsRoleVendor
cpe:2.3:a:apple:mail:-:*:*:*:*:*:*:*not specified by NVDVulnerableApple
cpe:2.3:a:apple:mail:-:*:*:*:*:iphone_os:*:*not specified by NVDVulnerableApple
cpe:2.3:a:bloop:airmail:-:*:*:*:*:*:*:*not specified by NVDVulnerableBloop
cpe:2.3:a:emclient:emclient:-:*:*:*:*:*:*:*not specified by NVDVulnerableEmclient
cpe:2.3:a:flipdogsolutions:maildroid:-:*:*:*:*:*:*:*not specified by NVDVulnerableFlipdogsolutions
cpe:2.3:a:freron:mailmate:-:*:*:*:*:*:*:*not specified by NVDVulnerableFreron
cpe:2.3:a:horde:horde_imp:-:*:*:*:*:*:*:*not specified by NVDVulnerableHorde
cpe:2.3:a:microsoft:outlook:2007:*:*:*:*:*:*:*2007VulnerableMicrosoft
cpe:2.3:a:mozilla:thunderbird:-:*:*:*:*:*:*:*not specified by NVDVulnerableMozilla
cpe:2.3:a:postbox-inc:postbox:-:*:*:*:*:*:*:*not specified by NVDVulnerablePostbox
  • 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:horde:horde_imp:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Horde
  • cpe:2.3:a:microsoft:outlook:2007:*:*:*:*:*:*:* Versions 2007 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
Show 2 more CPE
CPEVersionsRoleVendor
cpe:2.3:a:r2mail2:r2mail2:-:*:*:*:*:*:*:*not specified by NVDVulnerableR2mail2
cpe:2.3:a:roundcube:webmail:-:*:*:*:*:*:*:*not specified by NVDVulnerableRoundcube
  • cpe:2.3:a:r2mail2:r2mail2:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·R2mail2
  • cpe:2.3:a:roundcube:webmail:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Roundcube

Remediation

No fixed version listed by the sources yet.

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

Not affected: 3 products
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8

Timeline

  1. 2026-10-02 Threatist record created from CVE-2017-17688
  2. 2026-10-03 Alias added: GHSA-87q6-mg5f-mp98

References

Exploit 1

Advisory 7

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences