CVE-2018-12373

moderate-risk

Published 2018-10-18

dDecrypted S/MIME parts hidden with CSS or the plaintext HTML tag can leak plaintext when included in a HTML reply/forward. This vulnerability affects Thunderbird < 52.9.

Do I need to act?

1.1% chance of exploitation in next 30 days

EPSS score — moderate exploit probability

Not on CISA KEV list

No confirmed active exploitation reported to CISA

Patch status unknown

Check vendor advisories for fix availability and mitigation guidance

CVSS 6.5/10 Medium

NETWORK / LOW complexity

Affected Products (17)

Thunderbird

Enterprise Linux

Enterprise Linux Desktop

Enterprise Linux Server

Enterprise Linux Workstation

Debian Linux

Ubuntu Linux

Affected Vendors

Debian Redhat Mozilla Canonical

References (20)

Third Party Advisory http://www.securityfocus.com/bid/104613

Third Party Advisory https://access.redhat.com/errata/RHSA-2018:2251

Third Party Advisory https://access.redhat.com/errata/RHSA-2018:2252

Issue Tracking https://bugzilla.mozilla.org/show_bug.cgi?id=1464056

Issue Tracking https://bugzilla.mozilla.org/show_bug.cgi?id=1464667

Mailing List https://lists.debian.org/debian-lts-announce/2018/07/msg00013.html

Third Party Advisory https://security.gentoo.org/glsa/201811-13

Third Party Advisory https://usn.ubuntu.com/3714-1/

Third Party Advisory https://www.debian.org/security/2018/dsa-4244

Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2018-18/