Bug 1677613 (CVE-2018-18509)

Summary: CVE-2018-18509 thunderbird: flaw in verification of S/MIME signature resulting in signature spoofing
Product: [Other] Security Response Reporter: msiddiqu
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED ERRATA QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: cschalle, gecko-bugs-nobody, gecko-bugs-nobody, jhorak, john.j5live, kengert, pjasicek, rhughes, rstrode, sandmann, stransky
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: thunderbird 60.5.1 Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2020-03-13 10:31:43 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 1677614, 1690494, 1690495, 1690496, 1703893, 1703894    
Bug Blocks: 1677002    

Description msiddiqu 2019-02-15 11:18:24 UTC 
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.

External References: 
https://www.mozilla.org/en-US/security/advisories/mfsa2019-06/#CVE-2018-18509
Comment 1 msiddiqu 2019-02-15 11:18:40 UTC 
Created thunderbird tracking bugs for this issue:

Affects: fedora-all [bug 1677614]
Comment 2 msiddiqu 2019-02-15 11:20:26 UTC 
Reference: 
https://bugzilla.mozilla.org/show_bug.cgi?id=1507218
Comment 3 Product Security DevOps Team 2020-03-13 10:31:43 UTC 
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2018-18509