CVE-2017-17689

Publication date 16 May 2018

Last updated 21 July 2025

Ubuntu priority

Cvss 3 Severity Score

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

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
kmail	25.04 plucky	Not affected
	24.10 oracular	Ignored end of life, was needs-triage
	24.04 LTS noble	Not affected
	23.10 mantic	Ignored end of life, was needs-triage
	23.04 lunar	Ignored end of life, was needs-triage
	22.10 kinetic	Ignored end of life, was needs-triage
	22.04 LTS jammy	Not affected
	21.10 impish	Ignored end of life
	21.04 hirsute	Ignored end of life
	20.10 groovy	Ignored end of life
	20.04 LTS focal	Not affected
	19.10 eoan	Ignored end of life
	19.04 disco	Ignored end of life
	18.10 cosmic	Ignored end of life
	18.04 LTS bionic	Vulnerable
	17.10 artful	Ignored end of life
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release
thunderbird	25.04 plucky	Fixed 1:60.2.1+build1-0ubuntu1
	24.10 oracular	Fixed 1:60.2.1+build1-0ubuntu1
	24.04 LTS noble	Fixed 1:60.2.1+build1-0ubuntu1
	23.10 mantic	Fixed 1:60.2.1+build1-0ubuntu1
	23.04 lunar	Fixed 1:60.2.1+build1-0ubuntu1
	22.10 kinetic	Fixed 1:60.2.1+build1-0ubuntu1
	22.04 LTS jammy	Fixed 1:60.2.1+build1-0ubuntu1
	21.10 impish	Fixed 1:60.2.1+build1-0ubuntu1
	21.04 hirsute	Fixed 1:60.2.1+build1-0ubuntu1
	20.10 groovy	Fixed 1:60.2.1+build1-0ubuntu1
	20.04 LTS focal	Fixed 1:60.2.1+build1-0ubuntu1
	19.10 eoan	Fixed 1:60.2.1+build1-0ubuntu1
	19.04 disco	Fixed 1:60.2.1+build1-0ubuntu1
	18.10 cosmic	Fixed 1:60.2.1+build1-0ubuntu1
	18.04 LTS bionic	Fixed 1:52.8.0+build1-0ubuntu0.18.04.1
	17.10 artful	Fixed 1:52.8.0+build1-0ubuntu0.17.10.1
	16.04 LTS xenial	Fixed 1:52.8.0+build1-0ubuntu0.16.04.1
	14.04 LTS trusty	Fixed 1:52.8.0+build1-0ubuntu0.14.04.1
evolution	25.04 plucky	Not affected
	24.10 oracular	Not affected
	24.04 LTS noble	Not affected
	23.10 mantic	Not affected
	23.04 lunar	Not affected
	22.10 kinetic	Not affected
	22.04 LTS jammy	Not affected
	21.10 impish	Not affected
	21.04 hirsute	Not affected
	20.10 groovy	Not affected
	20.04 LTS focal	Not affected
	19.10 eoan	Not affected
	19.04 disco	Not affected
	18.10 cosmic	Not affected
	18.04 LTS bionic	Not affected
	17.10 artful	Ignored end of life
	16.04 LTS xenial	Not affected
	14.04 LTS trusty	Not in release
kf5-messagelib	25.04 plucky	Not in release
	24.04 LTS noble	Not affected
	22.04 LTS jammy	Not affected
	20.04 LTS focal	Not affected
	18.04 LTS bionic	Vulnerable
kdepim	25.04 plucky	Not in release
	24.04 LTS noble	Not in release
	22.04 LTS jammy	Not in release
	16.04 LTS xenial	Vulnerable
	14.04 LTS trusty	Vulnerable

Notes

mdeslaur

evolution upstream doesn’t belive this is an issue, marking as not-affected in thunderbird, this was called CVE-2018-5162

ej7367

In bionic, the patch for kmail depends on the two patches for kf5-messagelib. In xenial and trusty, the vulnerable code for kmail and kf5-messagelib is in the kdepim package.

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
kmail	Upstream: https://phabricator.kde.org/R206:88558f6273650a03d2828027e04116564ca18f20
kf5-messagelib	Upstream: https://phabricator.kde.org/R94:5a57b15ed2ab77fb0e6c193432e3736b5666a0b9 Upstream: https://phabricator.kde.org/R94:0bb1c5b12745b801f1aa4d6c630911845409e8ee
kdepim	Upstream: https://phabricator.kde.org/R94:5a57b15ed2ab77fb0e6c193432e3736b5666a0b9 Upstream: https://phabricator.kde.org/R94:0bb1c5b12745b801f1aa4d6c630911845409e8ee Upstream: https://phabricator.kde.org/R206:88558f6273650a03d2828027e04116564ca18f20

Severity score breakdown

Parameter	Value
Base score	5.9 · Medium
Attack vector	Network
Attack complexity	High
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	High
Integrity impact	None
Availability impact	None
Vector	CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N