Bug 1762818 (CVE-2019-11755)

Summary: CVE-2019-11755 thunderbird: spoofing a message author via a crafted S/MIME
Product: [Other] Security Response Reporter: kat <kbost>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED WONTFIX QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: cschalle, dmoppert, gecko-bugs-nobody, gecko-bugs-nobody, jhorak, john.j5live, kengert, kyoshida, pjasicek, rhughes, rstrode, sandmann, stransky
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Fixed In Version: thunderbird 68.1.1 Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2019-10-21 06:51:11 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Bug Depends On: 1762985    
Bug Blocks: 1762820    

Description kat 2019-10-17 14:58:35 UTC
A crafted S/MIME message consisting of an inner encryption layer and an outer SignedData layer was shown as having a valid digital signature, although the signer might have had no access to the contents of the encrypted message, and might have stripped a different signature from the encrypted message. Previous versions had only suppressed showing a digital signature for messages with an outer multipart/signed layer.

External References:

Comment 2 Sam Fowler 2019-10-18 00:17:10 UTC
Created thunderbird tracking bugs for this issue:

Affects: fedora-all [bug 1762985]

Comment 3 Doran Moppert 2019-10-21 01:18:52 UTC
This vulnerability was reported in Thunderbird 68.1; Thunderbird 60.9 appears to be not affected.

Comment 4 Doran Moppert 2019-10-21 01:18:55 UTC
External References:


Comment 5 Product Security DevOps Team 2019-10-21 06:51:11 UTC
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):