Bug 1749210 (CVE-2019-14664)

Summary: CVE-2019-14664 thunderbird-enigmail: information leak in response to encrypted mail
Product: [Other] Security Response Reporter: Dhananjay Arunesh <darunesh>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED UPSTREAM QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: extras-orphan, lupinix.fedora
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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Last Closed: 2019-09-05 13:07:19 UTC Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 1749211, 1749213    
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Description Dhananjay Arunesh 2019-09-05 07:12:26 UTC 
In Enigmail below 2.1, an attacker in possession of PGP encrypted emails can wrap them as sub-parts within a crafted multipart email. The encrypted part(s) can further be hidden using HTML/CSS or ASCII newline characters. This modified multipart email can be re-sent by the attacker to the intended receiver. If the receiver replies to this (benign looking) email, he unknowingly leaks the plaintext of the encrypted message part(s) back to the attacker. This attack variant bypasses protection mechanisms implemented after the "EFAIL" attacks.

Reference:
https://sourceforge.net/p/enigmail/bugs/984/
https://www.enigmail.net/index.php/en/download/changelog
Comment 1 Dhananjay Arunesh 2019-09-05 07:14:36 UTC 
Created thunderbird-enigmail tracking bugs for this issue:

Affects: epel-7 [bug 1749213]
Affects: fedora-all [bug 1749211]
Comment 2 Product Security DevOps Team 2019-09-05 13:07:19 UTC 
This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.