Improper Verification of Cryptographic Signature Affecting thunderbird package, versions <1:60.5.1-1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-DEBIANUNSTABLE-THUNDERBIRD-337374
- published15 Feb 2019
- disclosed26 Apr 2019
Introduced: 15 Feb 2019
CVE-2018-18509 (opens in a new tab)How to fix?
Upgrade Debian:unstable thunderbird to version 1:60.5.1-1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream thunderbird package and not the thunderbird package as distributed by Debian.
See How to fix? for Debian:unstable relevant fixed versions and status.
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.
References
- https://security-tracker.debian.org/tracker/CVE-2018-18509
- http://packetstormsecurity.com/files/152703/Johnny-You-Are-Fired.html
- 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/
- http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00043.html
- http://www.openwall.com/lists/oss-security/2019/04/30/4
- https://bugzilla.mozilla.org/show_bug.cgi?id=1507218
- https://access.redhat.com/errata/RHSA-2019:1144
- http://seclists.org/fulldisclosure/2019/Apr/38
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2018-18509