Bug 1677613 (CVE-2018-18509) - CVE-2018-18509 thunderbird: flaw in verification of S/MIME signature resulting in signature spoofing
Summary: CVE-2018-18509 thunderbird: flaw in verification of S/MIME signature resultin...
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2018-18509
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1677614 1690494 1690495 1690496 1703893 1703894
Blocks: 1677002
TreeView+ depends on / blocked
 
Reported: 2019-02-15 11:18 UTC by msiddiqu
Modified: 2020-03-13 10:31 UTC (History)
11 users (show)

Fixed In Version: thunderbird 60.5.1
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Last Closed: 2020-03-13 10:31:43 UTC
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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
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