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CVE-2016-1931

Multiple unspecified vulnerabilities in the browser engine in Mozilla Firefox before 44.0 allow...

10.0 CriticalFix available

Multiple unspecified vulnerabilities in the browser engine in Mozilla Firefox before 44.0 allow remote attackers to cause a denial of service (memory corruption and application crash) or possibly execute arbitrary code via vectors related to uninitialized memory encountered during brotli data compression, and other vectors.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
High
Availability
High

Exploit likelihood

5.72%Down 1.6 points since Feb 4, 2022
90%50%10%1%

What each source reports

NVD Score used 10.0

Multiple unspecified vulnerabilities in the browser engine in Mozilla Firefox before 44.0 allow remote attackers to cause a denial of service (memory corruption and application crash) or possibly execute arbitrary code via vectors related to uninitialized memory encountered during brotli data compression, and other vectors.

Record
CVE-2016-1931
CVSS 3.0
10.0 CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
CVSS 2.0
10.0 HighAV:N/AC:L/Au:N/C:C/I:C/A:C
Weakness
CWE-119
Updated
2026-11-02
CVE List No score

Multiple unspecified vulnerabilities in the browser engine in Mozilla Firefox before 44.0 allow remote attackers to cause a denial of service (memory corruption and application crash) or possibly execute arbitrary code via vectors related to uninitialized memory encountered during brotli data compression, and other vectors.

Record
CVE-2016-1931
Updated
2026-11-02
EUVDEUVD-2016-3020 No score

Multiple unspecified vulnerabilities in the browser engine in Mozilla Firefox before 44.0 allow remote attackers to cause a denial of service (memory corruption and application crash) or possibly execute arbitrary code via vectors related to uninitialized memory encountered during brotli data compression, and other vectors.

Record
EUVD-2016-3020
Updated
2026-11-03
GitHub AdvisoriesGHSA-x2jf-fqm5-8f5p 10.0

Multiple unspecified vulnerabilities in the browser engine in Mozilla Firefox before 44.0 allow...

Multiple unspecified vulnerabilities in the browser engine in Mozilla Firefox before 44.0 allow remote attackers to cause a denial of service (memory corruption and application crash) or possibly execute arbitrary code via vectors related to uninitialized memory encountered during brotli data compression, and other vectors.

Record
GHSA-x2jf-fqm5-8f5p
CVSS 3.0
10.0 CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Weakness
CWE-119
Updated
2026-11-02
OSVUBUNTU-CVE-2016-1931 10.0

Multiple unspecified vulnerabilities in the browser engine in Mozilla Firefox before 44.0 allow remote attackers to cause a denial of service (memory corruption and application crash) or possibly execute arbitrary code via vectors related to uninitialized memory encountered during brotli data compression, and other vectors.

Record
UBUNTU-CVE-2016-1931
CVSS 3.0
10.0 CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Updated
2026-11-02
OSVopenSUSE-SU-2024:10071-1 No score

MozillaFirefox-50.1.0-1.1 on GA media

These are all security issues fixed in the MozillaFirefox-50.1.0-1.1 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2024:10071-1
Updated
2026-11-02
OSVUSN-2880-1 No score

firefox vulnerabilities

Bob Clary, Christian Holler, Nils Ohlmeier, Gary Kwong, Jesse Ruderman, Carsten Book, Randell Jesup, Nicolas Pierron, Eric Rescorla, Tyson Smith, and Gabor Krizsanits discovered multiple memory safety issues in Firefox. If a user were tricked in to opening a specially crafted website, an attacker could potentially exploit these to cause a denial of service via application crash, or execute arbitrary code with the privileges of the user invoking Firefox. (CVE-2016-1930, CVE-2016-1931)

Gustavo Grieco discovered an out-of-memory crash when loading GIF images in some circumstances. If a user were tricked in to opening a specially crafted website, an attacker could exploit this to cause a denial of service. (CVE-2016-1933)

Aki Helin discovered a buffer overflow when rendering WebGL content in some circumstances. If a user were tricked in to opening a specially crafted website, an attacker could potentially exploit this to cause a denial of service via application crash, or execute arbitrary code with the privileges of the user invoking Firefox. (CVE-2016-1935)

It was discovered that a delay was missing when focusing the protocol handler dialog. If a user were tricked in to opening a specially crafted website, an attacker could potentially exploit this to conduct clickjacking attacks. (CVE-2016-1937)

Hanno Böck discovered that calculations with mp_div and mp_exptmod in NSS produce incorrect results in some circumstances, resulting in cryptographic weaknesses. (CVE-2016-1938)

Nicholas Hurley discovered that Firefox allows for control characters to be set in cookie names. An attacker could potentially exploit this to conduct cookie injection attacks on some web servers. (CVE-2016-1939)

It was discovered that when certain invalid URLs are pasted in to the addressbar, the addressbar contents may be manipulated to show the location of arbitrary websites. An attacker could potentially exploit this to conduct URL spoofing attacks. (CVE-2016-1942)

Ronald Crane discovered three vulnerabilities through code inspection. If a user were tricked in to opening a specially crafted website, an attacker could potentially exploit these to cause a denial of service via application crash, or execute arbitrary code with the privileges of the user invoking Firefox. (CVE-2016-1944, CVE-2016-1945, CVE-2016-1946)

François Marier discovered that Application Reputation lookups didn't work correctly, disabling warnings for potentially malicious downloads. An attacker could potentially exploit this by tricking a user in to downloading a malicious file. Other parts of the Safe Browsing feature were unaffected by this. (CVE-2016-1947)

Record
USN-2880-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
firefox
Ubuntu:14.04:LTS
before 44.0+build3-0ubuntu0.14.04.1, plus listed versions
24.0+build1-0ubuntu125.0+build3-0ubuntu0.13.10.128.0~b2+build1-0ubuntu228.0+build1-0ubuntu128.0+build2-0ubuntu1
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28.0+build2-0ubuntu229.0+build1-0ubuntu0.14.04.230.0+build1-0ubuntu0.14.04.331.0+build1-0ubuntu0.14.04.132.0+build1-0ubuntu0.14.04.132.0.3+build1-0ubuntu0.14.04.133.0+build2-0ubuntu0.14.04.134.0+build2-0ubuntu0.14.04.135.0+build3-0ubuntu0.14.04.235.0.1+build1-0ubuntu0.14.04.136.0+build2-0ubuntu0.14.04.436.0.1+build2-0ubuntu0.14.04.136.0.4+build1-0ubuntu0.14.04.137.0+build2-0ubuntu0.14.04.137.0.1+build1-0ubuntu0.14.04.137.0.2+build1-0ubuntu0.14.04.138.0+build3-0ubuntu0.14.04.139.0+build5-0ubuntu0.14.04.139.0.3+build2-0ubuntu0.14.04.140.0+build4-0ubuntu0.14.04.140.0+build4-0ubuntu0.14.04.440.0.3+build1-0ubuntu0.14.04.141.0+build3-0ubuntu0.14.04.141.0.1+build2-0ubuntu0.14.04.141.0.2+build2-0ubuntu0.14.04.142.0+build2-0ubuntu0.14.04.143.0+build1-0ubuntu0.14.04.143.0.4+build3-0ubuntu0.14.04.1
44.0+build3-0ubuntu0.14.04.1
firefox
Ubuntu:14.04:LTS
From an advisory covering 12 CVEs
before 44.0+build3-0ubuntu0.14.04.1, plus listed versions
24.0+build1-0ubuntu125.0+build3-0ubuntu0.13.10.128.0~b2+build1-0ubuntu228.0+build1-0ubuntu128.0+build2-0ubuntu1
Show 28 moreShow less
28.0+build2-0ubuntu229.0+build1-0ubuntu0.14.04.230.0+build1-0ubuntu0.14.04.331.0+build1-0ubuntu0.14.04.132.0+build1-0ubuntu0.14.04.132.0.3+build1-0ubuntu0.14.04.133.0+build2-0ubuntu0.14.04.134.0+build2-0ubuntu0.14.04.135.0+build3-0ubuntu0.14.04.235.0.1+build1-0ubuntu0.14.04.136.0+build2-0ubuntu0.14.04.436.0.1+build2-0ubuntu0.14.04.136.0.4+build1-0ubuntu0.14.04.137.0+build2-0ubuntu0.14.04.137.0.1+build1-0ubuntu0.14.04.137.0.2+build1-0ubuntu0.14.04.138.0+build3-0ubuntu0.14.04.139.0+build5-0ubuntu0.14.04.139.0.3+build2-0ubuntu0.14.04.140.0+build4-0ubuntu0.14.04.140.0+build4-0ubuntu0.14.04.440.0.3+build1-0ubuntu0.14.04.141.0+build3-0ubuntu0.14.04.141.0.1+build2-0ubuntu0.14.04.141.0.2+build2-0ubuntu0.14.04.142.0+build2-0ubuntu0.14.04.143.0+build1-0ubuntu0.14.04.143.0.4+build3-0ubuntu0.14.04.1
44.0+build3-0ubuntu0.14.04.1
MozillaFirefox
openSUSE:Tumbleweed
From an advisory covering 899 CVEs
before 50.1.0-1.1
50.1.0-1.1

History

History
RecordedChangedSources
affected, facts
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2016-1931 is a critical vulnerability (CVSS 10.0) in Mozilla Firefox, published January 26, 2016. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 5.72%, the 93rd percentile. Fixed in firefox 44.0+build3-0ubuntu0.14.04.1.

References

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