CVE-2018-18509
3Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackepss 1.7%
exploitation probability
1.7%top 24% of all CVEs
observed exploitation
nono source reports it
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.
Affected products
Mozilla · ThunderbirdReferences
http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00043.htmlhttp://packetstormsecurity.com/files/152703/Johnny-You-Are-Fired.htmlhttps://access.redhat.com/errata/RHSA-2019:1144https://bugzilla.mozilla.org/show_bug.cgi?id=1507218http://seclists.org/fulldisclosure/2019/Apr/38https://github.com/RUB-NDS/Johnny-You-Are-Firedhttps://github.com/RUB-NDS/Johnny-You-Are-Fired/blob/master/paper/johnny-fired.pdfhttps://www.mozilla.org/security/advisories/mfsa2019-06/http://www.openwall.com/lists/oss-security/2019/04/30/4