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AUSCERT Security Bulletin
ASB-2019.0043
Mozilla Foundation Security Advisory 2019-03
30 January 2019
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AusCERT Security Bulletin Summary
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Product: Mozilla Thunderbird
Operating System: UNIX variants (UNIX, Linux, OSX)
Windows
Impact/Access: Execute Arbitrary Code/Commands -- Remote with User Interaction
Increased Privileges -- Remote with User Interaction
Denial of Service -- Remote with User Interaction
Resolution: Patch/Upgrade
CVE Names: CVE-2018-18505 CVE-2018-18501 CVE-2018-18500
CVE-2016-5824
Member content until: Friday, March 1 2019
Reference: ASB-2019.0042
OVERVIEW
A vulnerability has been identified in Mozilla Thunderbird prior to
version 60.5. [1]
IMPACT
Mozilla has given the following information regarding these
vulnerabilities:
"CVE-2016-5824: DoS (use-after-free) via a crafted ics file
Reporter Brandon Perry
Impact low
Description
A vulnerability in the Libical libary used by Thunderbird can allow
remote attackers to cause a denial of service (use-after-free) via a
crafted ICS calendar file." [1]
"CVE-2018-18500: Use-after-free parsing HTML5 stream
Reporter Yaniv Frank with SophosLabs
Impact critical
Description
A use-after-free vulnerability can occur while parsing an HTML5 stream
in concert with custom HTML elements. This results in the stream
parser object being freed while still in use, leading to a potentially
exploitable crash." [1]
"CVE-2018-18501: Memory safety bugs fixed in Firefox 65, Firefox ESR
60.5, and Thunderbird 60.5
Reporter Mozilla developers and community
Impact critical
Description
Mozilla developers and community members Alex Gaynor, Christoph Diehl,
Steven Crane, Jason Kratzer, Gary Kwong, and Christian Holler reported
memory safety bugs present in Firefox 64, Firefox ESR 60.4, and
Thunderbird 60.4. Some of these bugs showed evidence of memory
corruption and we presume that with enough effort that some of these
could be exploited to run arbitrary code." [1]
"CVE-2018-18505: Privilege escalation through IPC channel messages
Reporter Jed Davis
Impact high
Description
An earlier fix for an Inter-process Communication (IPC) vulnerability,
CVE-2011-3079, added authentication to communication between IPC
endpoints and server parents during IPC process creation. This
authentication is insufficient for channels created after the IPC
process is started, leading to the authentication not being correctly
applied to later channels. This could allow for a sandbox escape
through IPC channels due to lack of message validation in the listener
process." [1]
MITIGATION
Mozilla recommends upgrading Thunderbird to the latest
version - Thunderbird 60.5. [1]
REFERENCES
[1] Security vulnerabilities fixed in Thunderbird 60.5
https://www.mozilla.org/en-US/security/advisories/mfsa2019-03/
AusCERT has made every effort to ensure that the information contained
in this document is accurate. However, the decision to use the information
described is the responsibility of each user or organisation. The decision to
follow or act on information or advice contained in this security bulletin is
the responsibility of each user or organisation, and should be considered in
accordance with your organisation's site policies and procedures. AusCERT
takes no responsibility for consequences which may arise from following or
acting on information or advice contained in this security bulletin.
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Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072
Internet Email: auscert@auscert.org.au
Facsimile: (07) 3365 7031
Telephone: (07) 3365 4417 (International: +61 7 3365 4417)
AusCERT personnel answer during Queensland business hours
which are GMT+10:00 (AEST).
On call after hours for member emergencies only.
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