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No exploitation reportedFix available

CVE-2017-17689

No exploitation reported by the sources we read.

  • Published2018-05-16

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

The S/MIME specification allows a Cipher Block Chaining (CBC) malleability-gadget attack that can indirectly lead to plaintext exfiltration, aka EFAIL.

Timeline

dates in UTC
  1. 2018-05-1619:29CVE publishedNVD

Versions per branch

NVD
Microsoft outlook
BranchAffectedFixed in
2007.x= 2007no fix published
2010.x= 2010no fix published
2013.x= 2013no fix published
2016.x= 2016no fix published
9folders nine
BranchAffectedFixed in
—all versionsno fix published
Apple mail
BranchAffectedFixed in
—all versionsno fix published

14 more products in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • enigmailSUSE:Package Hub 12all versions · fixed in 2.0.4-9.1
  • enigmailopenSUSE:Tumbleweedall versions · fixed in 2.2.4-1.4
  • evolutionDebian:14all versions · no fixed version listed
  • evolutionDebian:13all versions · no fixed version listed
  • evolutionDebian:12all versions · no fixed version listed
  • kdepimUbuntu:Pro:16.04:LTSall versions · fixed in 4:15.12.3-0ubuntu1.1+esm1
  • kdepimUbuntu:Pro:14.04:LTSall versions · fixed in 4:4.13.3-0ubuntu0.2+esm1
  • kf5-messagelibUbuntu:Pro:18.04:LTSall versions · fixed in 4:17.12.3-0ubuntu3+esm1

6 more package ranges on OSV.dev

Vendor advisories

  • CVE-2017-17689 Red Hat Product Security6 known affected

    S/MIME: CBC gadget attacks allows to exfiltrate plaintext out of encrypted emails

    kdepim-devel as a component of Red Hat Enterprise Linux 6 · kdepim-libs as a component of Red Hat Enterprise Linux 6 · kdepim.src as a component of Red Hat Enterprise Linux 6 · +3 more

Full record on NVD

Fix

  1. Workaround from the vendor Red Hat Product Security CVE-2017-17689 · 6 productsThe easiest way to mitigate this vulnerability is not to use HTML emails. If you really need to use them ensure that MUA clients disable external links embedded in HTML emails. For example in thunderbird email client, Edit->Preferences->Privacy->Disable "Allow remote content in messages".
  2. No fix planned, says the vendor Red Hat Product Security CVE-2017-17689 · 6 productsWill not fix

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Published
2018-05-16
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-xv45-9768-g2mm

Frequently asked questions

What is 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.

Is CVE-2017-17689 actively exploited?

Active exploitation of CVE-2017-17689 has not been confirmed. Its EPSS score was 4.1% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2017-17689?

CVE-2017-17689 has a CVSS v3 base score of 5.9 (MEDIUM severity), with vector string CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N.

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Sources for this record