VulnerabilityModified
CVE-2018-18509
The flaw allows an attacker to reuse a valid S/MIME signature to craft an email message with arbitrary content.
MEDIUM 5.3EPSS 1.68%
Does this matter?
Lower severity and a low EPSS score (1.68%). Track it; it rarely justifies an emergency change on its own.
Description
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.
- CVSS 3.0
- 5.3 MEDIUMCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
- EPSS
- 1.68% probability · 76th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-347
- Affected
- mozilla/thunderbird
- Source
- security@mozilla.org
References
- http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00043.html
- http://packetstormsecurity.com/files/152703/Johnny-You-Are-Fired.htmlThird Party Advisory, VDB Entry
- http://seclists.org/fulldisclosure/2019/Apr/38Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2019/04/30/4Mailing List, Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:1144
- https://bugzilla.mozilla.org/show_bug.cgi?id=1507218Issue Tracking, Permissions Required, Vendor Advisory
- 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/Vendor Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00043.html
- http://packetstormsecurity.com/files/152703/Johnny-You-Are-Fired.htmlThird Party Advisory, VDB Entry
- http://seclists.org/fulldisclosure/2019/Apr/38Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2019/04/30/4Mailing List, Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:1144
- https://bugzilla.mozilla.org/show_bug.cgi?id=1507218Issue Tracking, Permissions Required, Vendor Advisory
- 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/Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.