CVE-2018-18509

Reference Links

• http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00043.html
• http://packetstormsecurity.com/files/152703/Johnny-You-Are-Fired.html
• http://seclists.org/fulldisclosure/2019/Apr/38
• http://www.openwall.com/lists/oss-security/2019/04/30/4
• https://access.redhat.com/errata/RHSA-2019:1144
• https://bugzilla.mozilla.org/show_bug.cgi?id=1507218
• https://github.com/RUB-NDS/Johnny-You-Are-Fired
• https://github.com/RUB-NDS/Johnny-You-Are-Fired/blob/master/paper/johnny-fired.pdf
• https://www.mozilla.org/security/advisories/mfsa2019-06/
• https://www.mozilla.org/en-US/security/advisories/mfsa2019-06/
• https://launchpad.net/bugs/cve/CVE-2018-18509
• https://www.mozilla.org/en-US/security/advisories/mfsa2019-06/#CVE-2018-18511
• https://security-tracker.debian.org/tracker/CVE-2018-18509
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-18509
• https://nvd.nist.gov/vuln/detail/CVE-2018-18509
• https://ubuntu.com/security/CVE-2018-18509

Parent vulnerabilities

(Appears in the following advisories)

• MFSA2019-06

Peer vulnerabilities

(Found alongside the following vulnerabilities)

• CVE-2018-18356
• CVE-2019-5785
• CVE-2018-18335
• CVE-2018-18509

Frequently Asked Questions

• What is CVE-2018-18509?

  CVE-2018-18509 is a vulnerability in Thunderbird that allows an attacker to reuse a valid S/MIME signature to craft an email message with arbitrary contents.

• How does CVE-2018-18509 impact Thunderbird?

  CVE-2018-18509 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.

• What is the severity of CVE-2018-18509?

  The severity of CVE-2018-18509 is high, with a CVSS (Common Vulnerability Scoring System) score of 5.3.

• How can I fix CVE-2018-18509 in Thunderbird?

  To fix CVE-2018-18509 in Thunderbird, you should update Thunderbird to version 60.5.1 or later.

• Where can I find more information about CVE-2018-18509?

  You can find more information about CVE-2018-18509 in the following references: [Bugzilla](https://bugzilla.mozilla.org/show_bug.cgi?id=1507218), [Mozilla Security Advisory](https://www.mozilla.org/en-US/security/advisories/mfsa2019-06/), [Full Disclosure Mailing List](http://seclists.org/fulldisclosure/2019/Apr/38)