Spoofing attack in Mozilla Thunderbird - CVE-2018-18509

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Main Vulnerability Database Vulnerabilities #VU17703

Spoofing attack in Mozilla Thunderbird - CVE-2018-18509

Published: February 14, 2019


Vulnerability identifier: #VU17703
CSH Severity: Low
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2018-18509
CWE-ID: CWE-451
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to conduct spoofing attack.

The vulnerability exists due to a flaw during verification of certain S/MIME signatures causes emails can be shown in Thunderbird as having a valid digital signature, even if the shown message contents aren't covered by the signature. A remote attacker can reuse a valid S/MIME signature to craft an email message with arbitrary content.


Affected software

Mozilla Thunderbird
Arch Linux
Slackware Linux
Opensuse
SUSE Package Hub for SUSE Linux Enterprise
thunderbird (Ubuntu package)
thunderbird (Debian package)

How to mitigate CVE-2018-18509

Update to version 60.5.1.

Mozilla Thunderbird - update to 60.5.1
thunderbird (Ubuntu package) - addressed in versions 1:60.5.1+build2-0ubuntu0.14.04.1, 1:60.5.1+build2-0ubuntu0.16.04.1, 1:60.5.1+build2-0ubuntu0.18.04.1, 1:60.5.1+build2-0ubuntu0.18.10.1
thunderbird (Debian package) - update to 1:60.5.1-1~deb9u1

External References

Related Security Bulletins