CVE-2016-1938

6.5 MEDIUM
Published: January 31, 2016 Modified: May 06, 2026
View on NVD

Description

The s_mp_div function in lib/freebl/mpi/mpi.c in Mozilla Network Security Services (NSS) before 3.21, as used in Mozilla Firefox before 44.0, improperly divides numbers, which might make it easier for remote attackers to defeat cryptographic protection mechanisms by leveraging use of the (1) mp_div or (2) mp_exptmod function.

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CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00001.html
Source: security@mozilla.org
Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00002.html
Source: security@mozilla.org
Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00010.html
Source: security@mozilla.org
http://www.debian.org/security/2016/dsa-3688
Source: security@mozilla.org
http://www.mozilla.org/security/announce/2016/mfsa2016-07.html
Source: security@mozilla.org
Vendor Advisory
http://www.oracle.com/technetwork/security-advisory/cpujul2016-2881720.html
Source: security@mozilla.org
Third Party Advisory
http://www.securityfocus.com/bid/81955
Source: security@mozilla.org
http://www.securityfocus.com/bid/91787
Source: security@mozilla.org
Third Party Advisory VDB Entry
http://www.securitytracker.com/id/1034825
Source: security@mozilla.org
http://www.ubuntu.com/usn/USN-2880-1
Source: security@mozilla.org
http://www.ubuntu.com/usn/USN-2880-2
Source: security@mozilla.org
http://www.ubuntu.com/usn/USN-2903-1
Source: security@mozilla.org
http://www.ubuntu.com/usn/USN-2903-2
Source: security@mozilla.org
http://www.ubuntu.com/usn/USN-2973-1
Source: security@mozilla.org
https://blog.fuzzing-project.org/37-Mozilla-NSS-Wrong-calculation-results-in-mp_div-and-mp_exptmod.html
Source: security@mozilla.org
https://bugzilla.mozilla.org/show_bug.cgi?id=1190248
Source: security@mozilla.org
Issue Tracking
https://bugzilla.mozilla.org/show_bug.cgi?id=1194947
Source: security@mozilla.org
Issue Tracking
https://developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS/NSS_3.21_release_notes
Source: security@mozilla.org
Vendor Advisory
https://github.com/hannob/bignum-fuzz/blob/master/CVE-2016-1938-nss-mp_div.c
Source: security@mozilla.org
https://github.com/hannob/bignum-fuzz/blob/master/CVE-2016-1938-nss-mp_exptmod.c
Source: security@mozilla.org
https://hg.mozilla.org/projects/nss/diff/a555bf0fc23a/lib/freebl/mpi/mpi.c
Source: security@mozilla.org
https://security.gentoo.org/glsa/201605-06
Source: security@mozilla.org
https://security.gentoo.org/glsa/201701-46
Source: security@mozilla.org
http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00001.html
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00002.html
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00010.html
Source: af854a3a-2127-422b-91ae-364da2661108
http://www.debian.org/security/2016/dsa-3688
Source: af854a3a-2127-422b-91ae-364da2661108
http://www.mozilla.org/security/announce/2016/mfsa2016-07.html
Source: af854a3a-2127-422b-91ae-364da2661108
Vendor Advisory
http://www.oracle.com/technetwork/security-advisory/cpujul2016-2881720.html
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory
http://www.securityfocus.com/bid/81955
Source: af854a3a-2127-422b-91ae-364da2661108
http://www.securityfocus.com/bid/91787
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory VDB Entry
http://www.securitytracker.com/id/1034825
Source: af854a3a-2127-422b-91ae-364da2661108
http://www.ubuntu.com/usn/USN-2880-1
Source: af854a3a-2127-422b-91ae-364da2661108
http://www.ubuntu.com/usn/USN-2880-2
Source: af854a3a-2127-422b-91ae-364da2661108
http://www.ubuntu.com/usn/USN-2903-1
Source: af854a3a-2127-422b-91ae-364da2661108
http://www.ubuntu.com/usn/USN-2903-2
Source: af854a3a-2127-422b-91ae-364da2661108
http://www.ubuntu.com/usn/USN-2973-1
Source: af854a3a-2127-422b-91ae-364da2661108
https://blog.fuzzing-project.org/37-Mozilla-NSS-Wrong-calculation-results-in-mp_div-and-mp_exptmod.html
Source: af854a3a-2127-422b-91ae-364da2661108
https://bugzilla.mozilla.org/show_bug.cgi?id=1190248
Source: af854a3a-2127-422b-91ae-364da2661108
Issue Tracking
https://bugzilla.mozilla.org/show_bug.cgi?id=1194947
Source: af854a3a-2127-422b-91ae-364da2661108
Issue Tracking
https://developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS/NSS_3.21_release_notes
Source: af854a3a-2127-422b-91ae-364da2661108
Vendor Advisory
https://github.com/hannob/bignum-fuzz/blob/master/CVE-2016-1938-nss-mp_div.c
Source: af854a3a-2127-422b-91ae-364da2661108
https://github.com/hannob/bignum-fuzz/blob/master/CVE-2016-1938-nss-mp_exptmod.c
Source: af854a3a-2127-422b-91ae-364da2661108
https://hg.mozilla.org/projects/nss/diff/a555bf0fc23a/lib/freebl/mpi/mpi.c
Source: af854a3a-2127-422b-91ae-364da2661108
https://security.gentoo.org/glsa/201605-06
Source: af854a3a-2127-422b-91ae-364da2661108
https://security.gentoo.org/glsa/201701-46
Source: af854a3a-2127-422b-91ae-364da2661108

46 reference(s) from NVD

Quick Stats

CVSS v3 Score
6.5 / 10.0
EPSS (Exploit Probability)
1.0%
78th percentile
Exploitation Status
Not in CISA KEV

Weaknesses (CWE)

CWE-310

Affected Vendors

opensuse mozilla

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