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             AUSCERT External Security Bulletin Redistribution

                               ESB-2020.1970
     MFSA 2020-22 Security Vulnerabilities fixed in Thunderbird 68.9.0
                                5 June 2020

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           thunderbird
Publisher:         Mozilla
Operating System:  Windows
                   UNIX variants (UNIX, Linux, OSX)
Impact/Access:     Execute Arbitrary Code/Commands -- Remote with User Interaction
                   Denial of Service               -- Remote with User Interaction
                   Access Confidential Data        -- Remote with User Interaction
                   Reduced Security                -- Remote with User Interaction
Resolution:        Patch/Upgrade
CVE Names:         CVE-2020-12410 CVE-2020-12406 CVE-2020-12405
                   CVE-2020-12399 CVE-2020-12398 

Reference:         ESB-2020.1934
                   ESB-2020.1929
                   ESB-2020.1920
                   ESB-2020.1919

Original Bulletin: 
   https://www.mozilla.org/en-US/security/advisories/mfsa2020-22/

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Mozilla Foundation Security Advisory 2020-22

Security Vulnerabilities fixed in Thunderbird 68.9.0

Announced
    June 2, 2020
Impact
    high
Products
    Thunderbird
Fixed in
       Thunderbird 68.9

# CVE-2020-12399: Timing attack on DSA signatures in NSS library

Reporter
    Cesar Pereida Garcia and the Network and Information Security Group (NISEC)
    at Tampere University
Impact
    high

Description

NSS has shown timing differences when performing DSA signatures, which was
exploitable and could eventually leak private keys.

References

  o Bug 1631576

# CVE-2020-12405: Use-after-free in SharedWorkerService

Reporter
    Marcin 'Icewall' Noga of Cisco Talos
Impact
    high

Description

When browsing a malicious page, a race condition in our SharedWorkerService
could occur and lead to a potentially exploitable crash.

References

  o Bug 1631618

# CVE-2020-12406: JavaScript Type confusion with NativeTypes

Reporter
    Iain Ireland
Impact
    high

Description

Mozilla developer Iain Ireland discovered a missing type check during unboxed
objects removal, resulting in a crash. We presume that with enough effort that
it could be exploited to run arbitrary code.

References

  o Bug 1639590

# CVE-2020-12410: Memory safety bugs fixed in Thunderbird 68.9.0

Reporter
    Mozilla developers
Impact
    high

Description

Mozilla developers Tom Tung and Karl Tomlinson reported memory safety bugs
present in Firefox 68.8. Some of these bugs showed evidence of memory
corruption and we presume that with enough effort some of these could have been
exploited to run arbitrary code.

References

  o Memory safety bugs fixed in Thunderbird 68.9.0

# CVE-2020-12398: Security downgrade with IMAP STARTTLS leads to information
leakage

Reporter
    Damian Poddebniak
Impact
    high

Description

If Thunderbird is configured to use STARTTLS for an IMAP server, and the server
sends a PREAUTH response, then Thunderbird will continue with an unencrypted
connection, causing email data to be sent without protection.

References

  o Bug 1613623

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