CVE Vulnerability

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.

5 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 10 / Impact : 2.9

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact NONE

Integrity Impact PARTIAL

Availability Impact NONE

Scope

5.3 /10

CVSS v3.0 : MEDIUM

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

References
Link Resource
https://www.mozilla.org/security/advisories/mfsa2019-06/ Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1507218 Issue Tracking Permissions Required
http://www.openwall.com/lists/oss-security/2019/04/30/4 Mailing List Third Party Advisory
http://seclists.org/fulldisclosure/2019/Apr/38 Mailing List Third Party Advisory
http://packetstormsecurity.com/files/152703/Johnny-You-Are-Fired.html Third Party Advisory VDB Entry
https://github.com/RUB-NDS/Johnny-You-Are-Fired/blob/master/paper/johnny-fired.pdf
https://github.com/RUB-NDS/Johnny-You-Are-Fired
http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00043.html
https://access.redhat.com/errata/RHSA-2019:1144
Configurations

Configuration 1

cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
Information

Published : 2019-04-26 05:29

Updated : 2019-06-03 07:29

NVD link : CVE-2018-18509

Mitre link : CVE-2018-18509

Products Affected
No products.
CWE
CWE-347

Improper Verification of Cryptographic Signature