CVE-2018-18509
Published: 31 December 2018
A flaw during verification of certain S/MIME signatures causes emails to be shown in Thunderbird as having a valid digital signature, even if the shown message contents aren't covered by the signature. The flaw allows an attacker to reuse a valid S/MIME signature to craft an email message with arbitrary content. This vulnerability affects Thunderbird < 60.5.1.
Priority
Status
| Package | Release | Status |
|---|---|---|
|
thunderbird Launchpad, Ubuntu, Debian |
bionic |
Released
(1:60.5.1+build2-0ubuntu0.18.04.1)
|
| cosmic |
Released
(1:60.5.1+build2-0ubuntu0.18.10.1)
|
|
| trusty |
Released
(1:60.5.1+build2-0ubuntu0.14.04.1)
|
|
| upstream |
Released
(60.5.1)
|
|
| xenial |
Released
(1:60.5.1+build2-0ubuntu0.16.04.1)
|
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 5.3 |
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | None |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | None |
| Integrity impact | Low |
| Availability impact | None |
| Vector | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N |