CVE-2016-1963
The FileReader class in Mozilla Firefox before 45.0 allows local users to gain privileges or...
CVE-2016-1963 is a high vulnerability (CVSS 7.4) in Mozilla Firefox, published March 8, 2016. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.30%, the 22nd percentile. Fixed in firefox-esr 45.0esr-1.
The FileReader class in Mozilla Firefox before 45.0 allows local users to gain privileges or cause a denial of service (memory corruption) by changing a file during a FileReader API read operation.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- High
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
7.4
The FileReader class in Mozilla Firefox before 45.0 allows local users to gain privileges or cause a denial of service (memory corruption) by changing a file during a FileReader API read operation.
- Record
CVE-2016-1963- CVSS 3.0
- 7.4 High
CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 4.4 Medium
AV:L/AC:M/Au:N/C:P/I:P/A:P - Weakness
- CWE-119, CWE-264
- Updated
- 2026-11-02
CVE List No score
The FileReader class in Mozilla Firefox before 45.0 allows local users to gain privileges or cause a denial of service (memory corruption) by changing a file during a FileReader API read operation.
- Record
CVE-2016-1963- Updated
- 2026-11-02
EUVDEUVD-2016-3052 No score
The FileReader class in Mozilla Firefox before 45.0 allows local users to gain privileges or cause a denial of service (memory corruption) by changing a file during a FileReader API read operation.
- Record
EUVD-2016-3052- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-w6cr-qvrp-w86v
7.4
The FileReader class in Mozilla Firefox before 45.0 allows local users to gain privileges or...
The FileReader class in Mozilla Firefox before 45.0 allows local users to gain privileges or cause a denial of service (memory corruption) by changing a file during a FileReader API read operation.
- Record
GHSA-w6cr-qvrp-w86v- CVSS 3.0
- 7.4 High
CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-119
- Updated
- 2026-11-02
OSV
7.4
The FileReader class in Mozilla Firefox before 45.0 allows local users to gain privileges or cause a denial of service (memory corruption) by changing a file during a FileReader API read operation.
- Record
CVE-2016-1963- CVSS 3.0
- 7.4 High
CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
OSVDEBIAN-CVE-2016-1963
7.4
The FileReader class in Mozilla Firefox before 45.0 allows local users to gain privileges or cause a denial of service (memory corruption) by changing a file during a FileReader API read operation.
- Record
DEBIAN-CVE-2016-1963- CVSS 3.0
- 7.4 High
CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
Show 4 moreShow less
OSVUBUNTU-CVE-2016-1963
7.4
The FileReader class in Mozilla Firefox before 45.0 allows local users to gain privileges or cause a denial of service (memory corruption) by changing a file during a FileReader API read operation.
- Record
UBUNTU-CVE-2016-1963- CVSS 3.0
- 7.4 High
CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:U/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
OSVopenSUSE-SU-2024:14572-1 No score
firefox-esr-128.5.1-1.1 on GA media
These are all security issues fixed in the firefox-esr-128.5.1-1.1 package on the GA media of openSUSE Tumbleweed.
- Record
openSUSE-SU-2024:14572-1- Updated
- 2026-11-02
OSVUSN-2917-1 No score
firefox vulnerabilities
Francis Gabriel discovered a buffer overflow during ASN.1 decoding in NSS. 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-2016-1950)
Bob Clary, Christoph Diehl, Christian Holler, Andrew McCreight, Daniel Holbert, Jesse Ruderman, Randell Jesup, Carsten Book, Gian-Carlo Pascutto, Tyson Smith, Andrea Marchesini, and Jukka Jylänki 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-2016-1952, CVE-2016-1953)
Nicolas Golubovic discovered that CSP violation reports can be used to overwrite local files. If a user were tricked in to opening a specially crafted website with addon signing disabled and unpacked addons installed, an attacker could potentially exploit this to gain additional privileges. (CVE-2016-1954)
Muneaki Nishimura discovered that CSP violation reports contained full paths for cross-origin iframe navigations. An attacker could potentially exploit this to steal confidential data. (CVE-2016-1955)
Ucha Gobejishvili discovered that performing certain WebGL operations resulted in memory resource exhaustion with some Intel GPUs, requiring a reboot. If a user were tricked in to opening a specially crafted website, an attacker could potentially exploit this to cause a denial of service. (CVE-2016-1956)
Jose Martinez and Romina Santillan discovered a memory leak in libstagefright during MPEG4 video file processing 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 memory exhaustion. (CVE-2016-1957)
Abdulrahman Alqabandi discovered that the addressbar could be blank or filled with page defined content in some circumstances. If a user were tricked in to opening a specially crafted website, an attacker could potentially exploit this to conduct URL spoofing attacks. (CVE-2016-1958)
Looben Yang discovered an out-of-bounds read in Service Worker Manager. 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-2016-1959)
A use-after-free was discovered in the HTML5 string parser. 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-2016-1960)
A use-after-free was discovered in the SetBody function of HTMLDocument. 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-2016-1961)
Dominique Hazaël-Massieux discovered a use-after-free when using multiple WebRTC data channels. 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-2016-1962)
It was discovered that Firefox crashes when local files are modified whilst being read by the FileReader API. If a user were tricked in to opening a specially crafted website, an attacker could potentially exploit this to execute arbitrary code with the privileges of the user invoking Firefox. (CVE-2016-1963)
Nicolas Grégoire discovered a use-after-free during XML transformations. If a user were tricked in to…
- Record
USN-2917-1- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
firefox-esrDebian:12 |
before 45.0esr-1 | 45.0esr-1 |
firefox-esrDebian:13 |
before 45.0esr-1 | 45.0esr-1 |
firefox-esrDebian:14 |
before 45.0esr-1 | 45.0esr-1 |
firefoxUbuntu:14.04:LTS |
before 45.0+build2-0ubuntu0.14.04.1, plus listed versions 24.0+build1-0ubuntu125.0+build3-0ubuntu0.13.10.128.0~b2+build1-0ubuntu228.0+build1-0ubuntu128.0+build2-0ubuntu1 Show 31 moreShow less28.0+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+build3-0ubuntu0.14.04.144.0+build3-0ubuntu0.14.04.144.0.1+build2-0ubuntu0.14.04.144.0.2+build1-0ubuntu0.14.04.1 |
45.0+build2-0ubuntu0.14.04.1 |
MozillaFirefoxopenSUSE:Tumbleweed |
before 50.1.0-1.1 | 50.1.0-1.1 |
firefox-esropenSUSE:Tumbleweed |
before 128.5.1-1.1 | 128.5.1-1.1 |
History
| When | Changed | Sources |
|---|---|---|
| 2026-11-03 | aliases | EUVD |
| 2026-11-02 | created | CVE List, GitHub Advisories, NVD, OSV |
References
bugzilla.mozilla.org/show_bug.cgi?id=1238440
lists.opensuse.org/opensuse-security-announce/2016-03/msg00029.html
ubuntu.com/usn/USN-2917-1
mozilla.org/security/announce/2016/mfsa2016-26.html
lists.opensuse.org/opensuse-security-announce/2016-03/msg00031.html
securitytracker.com/id/1035215
Show 194 moreShow less
security.gentoo.org/glsa/201605-06
ubuntu.com/usn/USN-2917-2
ubuntu.com/usn/USN-2917-3
nvd.nist.gov/vuln/detail/CVE-2016-1963
github.com/advisories/GHSA-w6cr-qvrp-w86v
security-tracker.debian.org/tracker/CVE-2016-1963
ubuntu.com/security/CVE-2016-1963
mozilla.org/en-US/security/advisories/mfsa2016-26
ubuntu.com/security/notices/USN-2917-1
cve.org/CVERecord?id=CVE-2016-1963
ubuntu.com/security/CVE-2016-1950
ubuntu.com/security/CVE-2016-1952
ubuntu.com/security/CVE-2016-1953
ubuntu.com/security/CVE-2016-1954
ubuntu.com/security/CVE-2016-1955
ubuntu.com/security/CVE-2016-1956
ubuntu.com/security/CVE-2016-1957
ubuntu.com/security/CVE-2016-1958
ubuntu.com/security/CVE-2016-1959
ubuntu.com/security/CVE-2016-1960
ubuntu.com/security/CVE-2016-1961
ubuntu.com/security/CVE-2016-1962
ubuntu.com/security/CVE-2016-1964
ubuntu.com/security/CVE-2016-1965
ubuntu.com/security/CVE-2016-1966
ubuntu.com/security/CVE-2016-1967
ubuntu.com/security/CVE-2016-1968
ubuntu.com/security/CVE-2016-1973
ubuntu.com/security/CVE-2016-1974
ubuntu.com/security/CVE-2016-1977
ubuntu.com/security/CVE-2016-2790
ubuntu.com/security/CVE-2016-2791
ubuntu.com/security/CVE-2016-2792
ubuntu.com/security/CVE-2016-2793
ubuntu.com/security/CVE-2016-2794
ubuntu.com/security/CVE-2016-2795
ubuntu.com/security/CVE-2016-2796
ubuntu.com/security/CVE-2016-2797
ubuntu.com/security/CVE-2016-2798
ubuntu.com/security/CVE-2016-2799
ubuntu.com/security/CVE-2016-2800
ubuntu.com/security/CVE-2016-2801
ubuntu.com/security/CVE-2016-2802
suse.com/security/cve/CVE-2008-5913
suse.com/security/cve/CVE-2009-0040
suse.com/security/cve/CVE-2009-0652
suse.com/security/cve/CVE-2009-0771
suse.com/security/cve/CVE-2009-0772
suse.com/security/cve/CVE-2009-0773
suse.com/security/cve/CVE-2009-0774
suse.com/security/cve/CVE-2009-0775
suse.com/security/cve/CVE-2009-0776
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suse.com/security/cve/CVE-2009-3373
suse.com/security/cve/CVE-2009-3374
suse.com/security/cve/CVE-2009-3375
suse.com/security/cve/CVE-2009-3376
suse.com/security/cve/CVE-2009-3377
suse.com/security/cve/CVE-2009-3378
suse.com/security/cve/CVE-2009-3379
suse.com/security/cve/CVE-2009-3380
suse.com/security/cve/CVE-2009-3381
suse.com/security/cve/CVE-2009-3383
suse.com/security/cve/CVE-2009-3388
suse.com/security/cve/CVE-2009-3389
suse.com/security/cve/CVE-2009-3555
suse.com/security/cve/CVE-2009-3979
suse.com/security/cve/CVE-2009-3980
suse.com/security/cve/CVE-2009-3982
suse.com/security/cve/CVE-2009-3983
suse.com/security/cve/CVE-2009-3984
suse.com/security/cve/CVE-2009-3985
suse.com/security/cve/CVE-2010-0164
suse.com/security/cve/CVE-2010-0165
suse.com/security/cve/CVE-2010-0166
suse.com/security/cve/CVE-2010-0167
suse.com/security/cve/CVE-2010-0168
suse.com/security/cve/CVE-2010-0169
suse.com/security/cve/CVE-2010-0170
suse.com/security/cve/CVE-2010-0171
suse.com/security/cve/CVE-2010-0172
suse.com/security/cve/CVE-2010-0173
suse.com/security/cve/CVE-2010-0174
suse.com/security/cve/CVE-2010-0176
suse.com/security/cve/CVE-2010-0177
suse.com/security/cve/CVE-2010-0178
suse.com/security/cve/CVE-2010-0181
suse.com/security/cve/CVE-2010-0182
suse.com/security/cve/CVE-2010-0654
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suse.com/security/cve/CVE-2010-1121
suse.com/security/cve/CVE-2010-1125
suse.com/security/cve/CVE-2010-1196
suse.com/security/cve/CVE-2010-1197
suse.com/security/cve/CVE-2010-1198
suse.com/security/cve/CVE-2010-1199
suse.com/security/cve/CVE-2010-1200
suse.com/security/cve/CVE-2010-1201
suse.com/security/cve/CVE-2010-1202
suse.com/security/cve/CVE-2010-1203
suse.com/security/cve/CVE-2010-1205
suse.com/security/cve/CVE-2010-1206
suse.com/security/cve/CVE-2010-1207
suse.com/security/cve/CVE-2010-1208
suse.com/security/cve/CVE-2010-1209
suse.com/security/cve/CVE-2010-1210
suse.com/security/cve/CVE-2010-1211
suse.com/security/cve/CVE-2010-1212
suse.com/security/cve/CVE-2010-1213
suse.com/security/cve/CVE-2010-1214
suse.com/security/cve/CVE-2010-1215
suse.com/security/cve/CVE-2010-2751
suse.com/security/cve/CVE-2010-2752
suse.com/security/cve/CVE-2010-2753
suse.com/security/cve/CVE-2010-2754
suse.com/security/cve/CVE-2010-2755
suse.com/security/cve/CVE-2010-2760
suse.com/security/cve/CVE-2010-2762
suse.com/security/cve/CVE-2010-2764
suse.com/security/cve/CVE-2010-2765
suse.com/security/cve/CVE-2010-2766
suse.com/security/cve/CVE-2010-2767
suse.com/security/cve/CVE-2010-2768
suse.com/security/cve/CVE-2010-2769
suse.com/security/cve/CVE-2010-3166
suse.com/security/cve/CVE-2010-3167
suse.com/security/cve/CVE-2010-3168
suse.com/security/cve/CVE-2010-3169
suse.com/security/cve/CVE-2010-3170
suse.com/security/cve/CVE-2010-3173
suse.com/security/cve/CVE-2010-3174
suse.com/security/cve/CVE-2010-3175
suse.com/security/cve/CVE-2010-3176
suse.com/security/cve/CVE-2010-3177
suse.com/security/cve/CVE-2010-3178
suse.com/security/cve/CVE-2010-3179
suse.com/security/cve/CVE-2010-3180
suse.com/security/cve/CVE-2010-3182
suse.com/security/cve/CVE-2010-3183
suse.com/security/cve/CVE-2010-3765
suse.com/security/cve/CVE-2011-0068
suse.com/security/cve/CVE-2011-0069
suse.com/security/cve/CVE-2011-0070
suse.com/security/cve/CVE-2011-0079
suse.com/security/cve/CVE-2011-0080
suse.com/security/cve/CVE-2011-0081
suse.com/security/cve/CVE-2011-0084
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suse.com/security/cve/CVE-2011-2366
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suse.com/security/cve/CVE-2011-2370
suse.com/security/cve/CVE-2011-2371
suse.com/security/cve/CVE-2011-2372
suse.com/security/cve/CVE-2011-2373
suse.com/security/cve/CVE-2011-2374
suse.com/security/cve/CVE-2011-2375
suse.com/security/cve/CVE-2011-2377
suse.com/security/cve/CVE-2011-2985
suse.com/security/cve/CVE-2011-2986
lists.opensuse.org/archives/list/[email protected]/thread/3HI2RC7AJAHY74Q6MK7GNGWU6TITB22V
Left out here: 1,904 references and the rest of 1 source description. The JSON record has them.