Vulnerability Report

CVE-2016-1938

Title: Mozilla Firefox Cryptographic Failures

Other

Proof Of Concept

No public PoC currently indexed for CVE-2016-1938.

CWE Category CWE-310
Published Date Jan 31, 2016
Modified Date Jun 17, 2026
Exploit Status Not Found
Score 6.5 CVSS v3.0
Exploit Probability (EPSS)
3.12%

Vulnerability Summary

CVE-2016-1938: 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.

Impacted Vendors

M
mozilla 2
S
sun 1

Reference Links

http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00001.html http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00002.html http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00010.html http://www.debian.org/security/2016/dsa-3688 http://www.mozilla.org/security/announce/2016/mfsa2016-07.html http://www.oracle.com/technetwork/security-advisory/cpujul2016-2881720.html http://www.securityfocus.com/bid/81955 http://www.securityfocus.com/bid/91787 http://www.securitytracker.com/id/1034825 http://www.ubuntu.com/usn/USN-2880-1 http://www.ubuntu.com/usn/USN-2880-2 http://www.ubuntu.com/usn/USN-2903-1 http://www.ubuntu.com/usn/USN-2903-2 http://www.ubuntu.com/usn/USN-2973-1 https://blog.fuzzing-project.org/37-Mozilla-NSS-Wrong-calculation-results-in-mp_div-and-mp_exptmod.html https://bugzilla.mozilla.org/show_bug.cgi?id=1190248 https://bugzilla.mozilla.org/show_bug.cgi?id=1194947 https://developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS/NSS_3.21_release_notes https://github.com/hannob/bignum-fuzz/blob/master/CVE-2016-1938-nss-mp_div.c https://github.com/hannob/bignum-fuzz/blob/master/CVE-2016-1938-nss-mp_exptmod.c https://hg.mozilla.org/projects/nss/diff/a555bf0fc23a/lib/freebl/mpi/mpi.c https://security.gentoo.org/glsa/201605-06 https://security.gentoo.org/glsa/201701-46 http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00001.html http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00002.html http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00010.html http://www.debian.org/security/2016/dsa-3688 http://www.mozilla.org/security/announce/2016/mfsa2016-07.html http://www.oracle.com/technetwork/security-advisory/cpujul2016-2881720.html http://www.securityfocus.com/bid/81955 http://www.securityfocus.com/bid/91787 http://www.securitytracker.com/id/1034825 http://www.ubuntu.com/usn/USN-2880-1 http://www.ubuntu.com/usn/USN-2880-2 http://www.ubuntu.com/usn/USN-2903-1 http://www.ubuntu.com/usn/USN-2903-2 http://www.ubuntu.com/usn/USN-2973-1 https://blog.fuzzing-project.org/37-Mozilla-NSS-Wrong-calculation-results-in-mp_div-and-mp_exptmod.html https://bugzilla.mozilla.org/show_bug.cgi?id=1190248 https://bugzilla.mozilla.org/show_bug.cgi?id=1194947 https://developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS/NSS_3.21_release_notes https://github.com/hannob/bignum-fuzz/blob/master/CVE-2016-1938-nss-mp_div.c https://github.com/hannob/bignum-fuzz/blob/master/CVE-2016-1938-nss-mp_exptmod.c https://hg.mozilla.org/projects/nss/diff/a555bf0fc23a/lib/freebl/mpi/mpi.c https://security.gentoo.org/glsa/201605-06 https://security.gentoo.org/glsa/201701-46
CVSS v3.0
Source Entity [email protected]
Severity MEDIUM
6.5
Attack Vector
NETWORK
Complexity
LOW
Privileges
N/A
Interaction
NONE
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
UNCHANGED
RAW VECTOR CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
CVSS v2.0
Source Entity [email protected]
Severity MEDIUM
6.4
Access Vector
N/A
Authentication
N/A
RAW VECTOR AV:N/AC:L/Au:N/C:P/I:P/A:N

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2016-1938 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

MODIFIED

Vulnerability data updated via NVD.

MODIFIED

Vulnerability data updated via NVD.

MODIFIED

Vulnerability data or affected products updated.

PUBLISHED

Vulnerability first announced in NVD.

Attack Vector Matrix

Access Vector NETWORK
Complexity LOW
Privileges N/A
Interaction NONE
CVSS Vector String CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Affected Stack

No specific products linked.