CVE-2018-12373 Information disclosure in Thunderbird
Attackers can leak plaintext from encrypted S/MIME emails by hiding decrypted parts with CSS or HTML tags in replies or forwards.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2018-12373?
CVE-2018-12373 is a medium-severity vulnerability in Canonical Ubuntu Linux, published on 18 Oct 2018. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
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.
Weakness: CWE-200
Which versions are affected by CVE-2018-12373?
It affects 7 products.
Products include Canonical Ubuntu Linux, Debian Debian Linux, Mozilla Thunderbird, Redhat Enterprise Linux, Redhat Enterprise Linux Desktop, Redhat Enterprise Linux Server and 1 more.
How do I fix CVE-2018-12373?
Upgrade to a fixed version.
Is CVE-2018-12373 being exploited?
There is no known exploitation of CVE-2018-12373 in the wild and no public exploit code.
Other vulnerabilities in Canonical Ubuntu Linux
Sources
Also known as DEBIAN-CVE-2018-12373, GHSA-6x9p-vcwr-3q9w, UBUNTU-CVE-2018-12373.