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AUSCERT Security Bulletin
Security vulnerabilities fixed in Firefox ESR 52.7
14 March 2018
AusCERT Security Bulletin Summary
Product: Firefox Extended Support Release
Operating System: Windows
Impact/Access: Execute Arbitrary Code/Commands -- Remote with User Interaction
Increased Privileges -- Remote with User Interaction
Denial of Service -- Remote with User Interaction
Unauthorised Access -- Existing Account
CVE Names: CVE-2018-5145 CVE-2018-5144 CVE-2018-5131
CVE-2018-5130 CVE-2018-5129 CVE-2018-5127
Member content until: Friday, April 13 2018
Security vulnerabilities have been fixed in Firefox ESR 52.7. 
Mozilla have provided the following information:
CVE-2018-5127: Buffer overflow manipulating SVG animatedPathSegList
A buffer overflow can occur when manipulating the SVG animatedPathSegList
through script. This results in a potentially exploitable crash.
CVE-2018-5129: Out-of-bounds write with malformed IPC messages
A lack of parameter validation on IPC messages results in a potential
out-of-bounds write through malformed IPC messages. This can potentially allow
for sandbox escape through memory corruption in the parent process.
CVE-2018-5130: Mismatched RTP payload type can trigger memory corruption
When packets with a mismatched RTP payload type are sent in WebRTC connections,
in some circumstances a potentially exploitable crash is triggered.
CVE-2018-5131: Fetch API improperly returns cached copies of no-store/no-cache
Under certain circumstances the fetch() API can return transient local copies
of resources that were sent with a no-store or no-cache cache header instead of
downloading a copy from the network as it should. This can result in previously
stored, locally cached data of a website being accessible to users if they
share a common profile while browsing.
CVE-2018-5144: Integer overflow during Unicode conversion
An integer overflow can occur during conversion of text to some Unicode
character sets due to an unchecked length parameter.
CVE-2018-5125: Memory safety bugs fixed in Firefox 59 and Firefox ESR 52.7
Mozilla developers and community members Bob Clary, Olli Pettay, Christian
Holler, Nils Ohlmeier, Randell Jesup, Tyson Smith, Ralph Giles, and Philipp
reported memory safety bugs present in Firefox 58 and Firefox ESR 52.6. 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.
CVE-2018-5145: Memory safety bugs fixed in Firefox ESR 52.7
Mozilla developers Jet Villegas and Randell Jesup reported memory safety bugs
present in Firefox ESR 52.6. 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.
Mozilla recommends updating to Firefox ESR 52.7. 
 Security vulnerabilities fixed in Firefox ESR 52.7
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.
Australian Computer Emergency Response Team
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