NVD Vulnerability Detail

CVE-2020-12402

Summary	During RSA key generation, bignum implementations used a variation of the Binary Extended Euclidean Algorithm which entailed significantly input-dependent flow. This allowed an attacker able to perform electromagnetic-based side channel attacks to record traces leading to the recovery of the secret primes. Note: An unmodified Firefox browser does not generate RSA keys in normal operation and is not affected, but products built on top of it might. This vulnerability affects Firefox < 78.
Publication Date	July 10, 2020, 12:15 a.m.
Registration Date	Jan. 26, 2021, 11:51 a.m.
Last Update	Nov. 21, 2024, 1:59 p.m.

CVSS3.1 : MEDIUM
スコア	4.4
Vector	CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:N/A:N
攻撃元区分(AV)	ローカル
攻撃条件の複雑さ(AC)	高
攻撃に必要な特権レベル(PR)	低
利用者の関与(UI)	要
影響の想定範囲(S)	変更なし
機密性への影響(C)	高
完全性への影響(I)	なし
可用性への影響(A)	なし

CVSS2.0 : LOW
Score	1.2
Vector	AV:L/AC:H/Au:N/C:P/I:N/A:N
攻撃元区分(AV)	ローカル
攻撃条件の複雑さ(AC)	高
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)	なし
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	はい

Affected software configurations

Configuration1		or higher	or less	more than	less than
cpe:2.3:a:mozilla:firefox::::::::					78.0

Configuration2	or higher	or less	more than	less than
cpe:2.3:o:opensuse:leap:15.1:::::::*
cpe:2.3:o:fedoraproject:fedora:32:::::::*
cpe:2.3:o:opensuse:leap:15.2:::::::*

Configuration3		or higher	or less	more than	less than
cpe:2.3:o:debian:debian_linux:9.0:::::::*

Related information, measures and tools

No	URL	タグ
1	http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00016.html	Third Party Advisory
2	http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00018.html	Third Party Advisory
3	http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00027.html	Third Party Advisory
4	http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00049.html	Third Party Advisory
5	https://bugzilla.mozilla.org/show_bug.cgi?id=1631597	Issue Tracking Permissions Required Vendor Advisory
6	https://lists.debian.org/debian-lts-announce/2020/09/msg00029.html	Mailing List Third Party Advisory
7	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RFL6UNFK4MG2WDXLMLFAEIUSM5EUK7CG/
8	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UWVDJRARXNWWWTCGMM63EXLQHH2LNOXO/
9	https://security.gentoo.org/glsa/202007-10	Third Party Advisory
10	https://usn.ubuntu.com/4417-1/	Third Party Advisory
11	https://usn.ubuntu.com/4417-2/	Third Party Advisory
12	https://www.debian.org/security/2020/dsa-4726	Third Party Advisory
13	https://www.mozilla.org/security/advisories/mfsa2020-24/	Vendor Advisory
14	http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00016.html	Third Party Advisory
15	https://www.mozilla.org/security/advisories/mfsa2020-24/	Vendor Advisory
16	https://www.debian.org/security/2020/dsa-4726	Third Party Advisory
17	https://usn.ubuntu.com/4417-2/	Third Party Advisory
18	https://usn.ubuntu.com/4417-1/	Third Party Advisory
19	https://security.gentoo.org/glsa/202007-10	Third Party Advisory
20	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UWVDJRARXNWWWTCGMM63EXLQHH2LNOXO/
21	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RFL6UNFK4MG2WDXLMLFAEIUSM5EUK7CG/
22	https://lists.debian.org/debian-lts-announce/2020/09/msg00029.html	Mailing List Third Party Advisory
23	https://bugzilla.mozilla.org/show_bug.cgi?id=1631597	Issue Tracking Permissions Required Vendor Advisory
24	http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00049.html	Third Party Advisory
25	http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00027.html	Third Party Advisory
26	http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00018.html	Third Party Advisory

Common Vulnerabilities List

No	CWE	Name	URL
1	CWE-203	セキュリティ関連の処理に対するレスポンスの違いに起因する情報漏えい	https://cwe.mitre.org/data/definitions/203.html

JVN Vulnerability Information

Firefox における暗号アルゴリズムの使用に関する脆弱性

Title	Firefox における暗号アルゴリズムの使用に関する脆弱性
Summary	Firefox には、暗号アルゴリズムの使用に関する脆弱性が存在します。
Possible impacts	情報を取得さ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	June 30, 2020, midnight
Registration Date	Aug. 19, 2020, 8:59 a.m.
Last Update	Aug. 19, 2020, 8:59 a.m.

Affected System

Mozilla Foundation

Mozilla Firefox 78 未満

Fedora Project

Fedora

openSUSE project

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-2020-12402	https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-12402
National Vulnerability Database (NVD)
2	CVE-2020-12402	https://nvd.nist.gov/vuln/detail/CVE-2020-12402

CWE (共通脆弱性タイプ一覧)

No	Name	URL
JVNDB
1	CWE-327	https://cwe.mitre.org/data/definitions/327.html

ベンダー情報

No	Name	URL
Fedora Update Notification
1	FEDORA-2020-16741ac7ff	https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RFL6UNFK4MG2WDXLMLFAEIUSM5EUK7CG/
2	FEDORA-2020-3ef1937475	https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UWVDJRARXNWWWTCGMM63EXLQHH2LNOXO/
Mozilla Foundation Security Advisory
3	MFSA2020-24	https://www.mozilla.org/security/advisories/mfsa2020-24/
openSUSE Security Update
4	openSUSE-SU-2020:0953-1	http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00016.html
5	openSUSE-SU-2020:0955-1	http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00018.html
6	openSUSE-SU-2020:0983-1	http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00027.html
7	openSUSE-SU-2020:1017-1	http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00049.html

Change Log

No	Changed Details	Date of change
1	[2020年08月19日] 掲載	Aug. 19, 2020, 8:59 a.m.