National Vulnerability Database

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    Vulnerabilities Detail

CVE-2016-1938 Detail

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.

Source:  MITRE
Description Last Modified:  01/31/2016

Impact

CVSS v3.0 Severity and Metrics:

Base Score: 6.5 MEDIUM
Vector: AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N (V3 legend)
Impact Score: 2.5
Exploitability Score: 3.9

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): Low
Integrity (I): Low
Availability (A): None

CVSS v2.0 Severity and Metrics:

Base Score: 6.4 MEDIUM
Vector: (AV:N/AC:L/Au:N/C:P/I:P/A:N) (V2 legend)
Impact Subscore: 4.9
Exploitability Subscore: 10.0

Access Vector (AV): Network
Access Complexity (AC): Insufficient_Info
Authentication (AU): None
Confidentiality (C): Partial
Integrity (I): Partial
Availability (A): None
Additional Information:
Allows unauthorized disclosure of information
Allows unauthorized modification

References to Advisories, Solutions, and Tools

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Hyperlink Resource
http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00001.html Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00002.html Third Party Advisory
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 Vendor Advisory
http://www.oracle.com/technetwork/security-advisory/cpujul2016-2881720.html Third Party Advisory
http://www.securityfocus.com/bid/81955
http://www.securityfocus.com/bid/91787 Third Party Advisory VDB Entry
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 Issue Tracking
https://bugzilla.mozilla.org/show_bug.cgi?id=1194947 Issue Tracking
https://developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS/NSS_3.21_release_notes Vendor Advisory
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

Technical Details

Vulnerability Type (View All)

Change History

18 change records found - show changes

Quick Info

CVE Dictionary Entry:
CVE-2016-1938
NVD Published Date:
01/31/2016
NVD Last Modified:
10/30/2018