Bug 1790323 - enigmail: Unsigned MIME parts displayed as signed
Summary: enigmail: Unsigned MIME parts displayed as signed
Keywords:
Status: CLOSED UPSTREAM
Alias: None
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1790324 1790325
Blocks:
TreeView+ depends on / blocked
 
Reported: 2020-01-13 06:37 UTC by Pedro Sampaio
Modified: 2020-01-13 08:09 UTC (History)
1 user (show)

Fixed In Version: enigmail 2.1.5
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Clone Of:
Environment:
Last Closed: 2020-01-13 08:09:32 UTC

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Description Pedro Sampaio 2020-01-13 06:37:00 UTC 
Using Content-Type = multipart/alternative, it is possible to trick Enigmail into displaying a valid signature status for a MIME part that is actually not signed.

Such messages have the following structrure (or similar):

multipart/alternative
|- multipart/signed
|  |- text/plain
|
|- text/html

Fixed in 2.1.5.

Reproducer:

https://sourceforge.net/p/enigmail/bugs/1044/attachment/Sample%20Message.eml
https://sourceforge.net/p/enigmail/bugs/_discuss/thread/90e18ceedb/e1d4/attachment/Pubkey.asc

References:

https://sourceforge.net/p/enigmail/bugs/1044/
Comment 1 Pedro Sampaio 2020-01-13 06:37:21 UTC 
Created thunderbird-enigmail tracking bugs for this issue:

Affects: epel-7 [bug 1790325]
Affects: fedora-all [bug 1790324]
Comment 2 Product Security DevOps Team 2020-01-13 08:09:32 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.
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