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Vulnerability Details : CVE-2018-18509

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.
Publish Date : 2019-04-26 Last Update Date : 2019-06-03
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- CVSS Scores & Vulnerability Types

CVSS Score
5.0
Confidentiality Impact None (There is no impact to the confidentiality of the system.)
Integrity Impact Partial (Modification of some system files or information is possible, but the attacker does not have control over what can be modified, or the scope of what the attacker can affect is limited.)
Availability Impact None (There is no impact to the availability of the system.)
Access Complexity Low (Specialized access conditions or extenuating circumstances do not exist. Very little knowledge or skill is required to exploit. )
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s)
CWE ID 347

- Related OVAL Definitions

Title Definition Id Class Family
RHSA-2019:0680: thunderbird security update (Important) oval:com.redhat.rhsa:def:20190680 unix
RHSA-2019:0681: thunderbird security update (Important) oval:com.redhat.rhsa:def:20190681 unix
RHSA-2019:1144: thunderbird security update (Important) oval:com.redhat.rhsa:def:20191144 unix
OVAL (Open Vulnerability and Assessment Language) definitions define exactly what should be done to verify a vulnerability or a missing patch. Check out the OVAL definitions if you want to learn what you should do to verify a vulnerability.

- Products Affected By CVE-2018-18509

# Product Type Vendor Product Version Update Edition Language
1 Application Mozilla Thunderbird * * * * Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Mozilla Thunderbird 1

- References For CVE-2018-18509

https://access.redhat.com/errata/RHSA-2019:1144
REDHAT RHSA-2019:1144
http://seclists.org/fulldisclosure/2019/Apr/38
FULLDISC 20190430 OpenPGP and S/MIME signature forgery attacks in multiple email clients
https://github.com/RUB-NDS/Johnny-You-Are-Fired/blob/master/paper/johnny-fired.pdf
http://packetstormsecurity.com/files/152703/Johnny-You-Are-Fired.html
https://github.com/RUB-NDS/Johnny-You-Are-Fired
http://www.openwall.com/lists/oss-security/2019/04/30/4
MLIST [oss-security] 20190430 Spoofing OpenPGP and S/MIME Signatures in Emails (multiple clients)
http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00043.html
SUSE openSUSE-SU-2019:1162
https://www.mozilla.org/security/advisories/mfsa2019-06/
https://bugzilla.mozilla.org/show_bug.cgi?id=1507218

- Metasploit Modules Related To CVE-2018-18509

There are not any metasploit modules related to this CVE entry (Please visit www.metasploit.com for more information)


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