NVD Vulnerability Detail

CVE-2016-1938

Summary	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.
Publication Date	Feb. 1, 2016, 3:59 a.m.
Registration Date	Jan. 26, 2021, 2:08 p.m.
Last Update	Nov. 21, 2024, 11:47 a.m.

CVSS3.0 : MEDIUM
スコア	6.5
Vector	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
攻撃元区分(AV)	ネットワーク
攻撃条件の複雑さ(AC)	低
攻撃に必要な特権レベル(PR)	不要
利用者の関与(UI)	不要
影響の想定範囲(S)	変更なし
機密性への影響(C)	低
完全性への影響(I)	低
可用性への影響(A)	なし

CVSS2.0 : MEDIUM
Score	6.4
Vector	AV:N/AC:L/Au:N/C:P/I:P/A:N
攻撃元区分(AV)	ネットワーク
攻撃条件の複雑さ(AC)	低
攻撃前の認証要否(Au)	不要
機密性への影響(C)	低
完全性への影響(I)	低
可用性への影響(A)	なし
Get all privileges.	いいえ
Get user privileges	いいえ
Get other privileges	いいえ
User operation required	いいえ

Affected software configurations

Configuration1	or higher	or less	more than	less than
cpe:2.3:o:opensuse:leap:42.1:::::::*
cpe:2.3:o:opensuse:opensuse:13.1:::::::*
cpe:2.3:o:opensuse:opensuse:13.2:::::::*

Configuration2	or higher	or less	more than	less than
cpe:2.3:a:mozilla:nss::::::::		3.20.1
cpe:2.3:a:mozilla:firefox::::::::		43.0.4

Related information, measures and tools

No	URL	タグ
1	http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00001.html	Third Party Advisory
2	http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00001.html	Third Party Advisory
3	http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00002.html	Third Party Advisory
4	http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00002.html	Third Party Advisory
5	http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00010.html
6	http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00010.html
7	http://www.debian.org/security/2016/dsa-3688
8	http://www.debian.org/security/2016/dsa-3688
9	http://www.mozilla.org/security/announce/2016/mfsa2016-07.html	Vendor Advisory
10	http://www.mozilla.org/security/announce/2016/mfsa2016-07.html	Vendor Advisory
11	http://www.oracle.com/technetwork/security-advisory/cpujul2016-2881720.html	Third Party Advisory
12	http://www.oracle.com/technetwork/security-advisory/cpujul2016-2881720.html	Third Party Advisory
13	http://www.securityfocus.com/bid/81955
14	http://www.securityfocus.com/bid/81955
15	http://www.securityfocus.com/bid/91787	Third Party Advisory VDB Entry
16	http://www.securityfocus.com/bid/91787	Third Party Advisory VDB Entry
17	http://www.securitytracker.com/id/1034825
18	http://www.securitytracker.com/id/1034825
19	http://www.ubuntu.com/usn/USN-2880-1
20	http://www.ubuntu.com/usn/USN-2880-1
21	http://www.ubuntu.com/usn/USN-2880-2
22	http://www.ubuntu.com/usn/USN-2880-2
23	http://www.ubuntu.com/usn/USN-2903-1
24	http://www.ubuntu.com/usn/USN-2903-1
25	http://www.ubuntu.com/usn/USN-2903-2
26	http://www.ubuntu.com/usn/USN-2903-2
27	http://www.ubuntu.com/usn/USN-2973-1
28	http://www.ubuntu.com/usn/USN-2973-1
29	https://blog.fuzzing-project.org/37-Mozilla-NSS-Wrong-calculation-results-in-mp_div-and-mp_exptmod.html
30	https://blog.fuzzing-project.org/37-Mozilla-NSS-Wrong-calculation-results-in-mp_div-and-mp_exptmod.html
31	https://bugzilla.mozilla.org/show_bug.cgi?id=1190248	Issue Tracking
32	https://bugzilla.mozilla.org/show_bug.cgi?id=1190248	Issue Tracking
33	https://bugzilla.mozilla.org/show_bug.cgi?id=1194947	Issue Tracking
34	https://bugzilla.mozilla.org/show_bug.cgi?id=1194947	Issue Tracking
35	https://developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS/NSS_3.21_release_notes	Vendor Advisory
36	https://developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS/NSS_3.21_release_notes	Vendor Advisory
37	https://github.com/hannob/bignum-fuzz/blob/master/CVE-2016-1938-nss-mp_div.c
38	https://github.com/hannob/bignum-fuzz/blob/master/CVE-2016-1938-nss-mp_div.c
39	https://github.com/hannob/bignum-fuzz/blob/master/CVE-2016-1938-nss-mp_exptmod.c
40	https://github.com/hannob/bignum-fuzz/blob/master/CVE-2016-1938-nss-mp_exptmod.c
41	https://hg.mozilla.org/projects/nss/diff/a555bf0fc23a/lib/freebl/mpi/mpi.c
42	https://hg.mozilla.org/projects/nss/diff/a555bf0fc23a/lib/freebl/mpi/mpi.c
43	https://security.gentoo.org/glsa/201605-06
44	https://security.gentoo.org/glsa/201605-06
45	https://security.gentoo.org/glsa/201701-46
46	https://security.gentoo.org/glsa/201701-46

Common Vulnerabilities List

No	CWE	Name	URL
1	CWE-310	暗号の問題	https://cwe.mitre.org/data/definitions/310.html

JVN Vulnerability Information

Mozilla Firefox で使用される Mozilla Network Security Services の lib/freebl/mpi/mpi.c における暗号保護メカニズムを破られる脆弱性

Title	Mozilla Firefox で使用される Mozilla Network Security Services の lib/freebl/mpi/mpi.c における暗号保護メカニズムを破られる脆弱性
Summary	Mozilla Firefox で使用される Mozilla Network Security Services (NSS) の lib/freebl/mpi/mpi.c 内の s_mp_div 関数は、除算を適切に行わないため、暗号保護メカニズムを破られる脆弱性が存在します。
Possible impacts	第三者により、(1) mp_div または (2) mp_exptmod 関数の使用を利用されることで、暗号保護メカニズムを破られる可能性があります。
Solution	ベンダより正式な対策が公開されています。ベンダ情報を参照して適切な対策を実施してください。
Publication Date	Jan. 26, 2016, midnight
Registration Date	Feb. 12, 2016, 12:39 p.m.
Last Update	Nov. 22, 2016, 5:49 p.m.

Affected System

Mozilla Foundation

Mozilla Firefox 44.0 未満

Mozilla Network Security Services (NSS) 3.21 未満

openSUSE project

openSUSE

openSUSE Leap

CVE (情報セキュリティ共通脆弱性識別子)

No	Name	URL
Common Vulnerabilities and Exposures (CVE)
1	CVE-2016-1938	http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-1938
National Vulnerability Database (NVD)
2	CVE-2016-1938	http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2016-1938

CWE (共通脆弱性タイプ一覧)

No	Name	URL
JVNDB
1	CWE-310	https://jvndb.jvn.jp/ja/cwe/CWE-310.html

ベンダー情報

No	Name	URL
GitHub
1	bignum-fuzz/CVE-2016-1938-nss-mp_div.c	https://github.com/hannob/bignum-fuzz/blob/master/CVE-2016-1938-nss-mp_div.c
2	bignum-fuzz/CVE-2016-1938-nss-mp_exptmod.c	https://github.com/hannob/bignum-fuzz/blob/master/CVE-2016-1938-nss-mp_exptmod.c
Mozilla Bugzilla
3	Bug 1190248	https://bugzilla.mozilla.org/show_bug.cgi?id=1190248
4	Bug 1194947	https://bugzilla.mozilla.org/show_bug.cgi?id=1194947
Mozilla Developer Network
5	NSS 3.21 release notes	https://developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS/NSS_3.21_release_notes
Mozilla Foundation
6	lib/freebl/mpi/mpi.c	https://hg.mozilla.org/projects/nss/diff/a555bf0fc23a/lib/freebl/mpi/mpi.c
Mozilla Foundation Security Advisory
7	MFSA2016-07	http://www.mozilla.org/security/announce/2016//mfsa2016-07.html
Mozilla Foundation セキュリティアドバイザリ
8	MFSA2016-07	http://www.mozilla-japan.org/security/announce/2016/mfsa2016-07.html
opensuse-security-announce
9	openSUSE-SU-2016:0306	https://lists.opensuse.org/opensuse-security-announce/2016-02/msg00001.html
10	openSUSE-SU-2016:0309	https://lists.opensuse.org/opensuse-security-announce/2016-02/msg00002.html
Oracle Critical Patch Update
11	Oracle Critical Patch Update Advisory - July 2016	http://www.oracle.com/technetwork/security-advisory/cpujul2016-2881720.html

Change Log

No	Changed Details	Date of change
0	[2016年02月12日] 掲載 [2016年09月05日] ベンダ情報：Mozilla Foundation (Bug 1190248) を追加ベンダ情報：Mozilla Foundation (NSS 3.21 release notes) を追加 [2016年11月22日] ベンダ情報：オラクル (Oracle Critical Patch Update Advisory - July 2016) を追加	Feb. 17, 2018, 10:37 a.m.