NVD Vulnerability Detail

CVE-2019-7308

Summary	kernel/bpf/verifier.c in the Linux kernel before 4.20.6 performs undesirable out-of-bounds speculation on pointer arithmetic in various cases, including cases of different branches with different state or limits to sanitize, leading to side-channel attacks.
Publication Date	Feb. 2, 2019, 7:29 a.m.
Registration Date	Jan. 26, 2021, 11:44 a.m.
Last Update	Nov. 21, 2024, 1:47 p.m.

CVSS3.0 : MEDIUM
スコア	5.6
Vector	CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/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)	不要
影響の想定範囲(S)	変更あり
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 : MEDIUM
Score	4.7
Vector	AV:L/AC:M/Au:N/C:C/I:N/A:N
攻撃元区分(AV)	ローカル
攻撃条件の複雑さ(AC)	中
攻撃前の認証要否(Au)	不要
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
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:linux:linux_kernel::::::::				4.19.19
cpe:2.3:o:linux:linux_kernel::::::::	4.20.0			4.20.6

Configuration2	or higher	or less	more than	less than
cpe:2.3:o:canonical:ubuntu_linux:16.04::::lts:::
cpe:2.3:o:canonical:ubuntu_linux:14.04::::lts:::
cpe:2.3:o:canonical:ubuntu_linux:18.04::::lts:::
cpe:2.3:o:canonical:ubuntu_linux:18.10:::::::*

Configuration3		or higher	or less	more than	less than
cpe:2.3:o:opensuse:leap:15.0:::::::*

Related information, measures and tools

No	URL	タグ
1	http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=979d63d50c0c0f7bc537bf821e056cc9fe5abd38	Patch Third Party Advisory
2	http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=d3bd7413e0ca40b60cf60d4003246d067cafdeda	Patch Third Party Advisory
3	http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00052.html	Third Party Advisory
4	http://www.securityfocus.com/bid/106827	Third Party Advisory VDB Entry
5	https://bugs.chromium.org/p/project-zero/issues/detail?id=1711	Issue Tracking Patch Third Party Advisory
6	https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.20.6	Third Party Advisory
7	https://github.com/torvalds/linux/commit/979d63d50c0c0f7bc537bf821e056cc9fe5abd38	Patch Third Party Advisory
8	https://github.com/torvalds/linux/commit/d3bd7413e0ca40b60cf60d4003246d067cafdeda	Patch Third Party Advisory
9	https://support.f5.com/csp/article/K43030517
10	https://support.f5.com/csp/article/K43030517?utm_source=f5support&amp%3Butm_medium=RSS
11	https://usn.ubuntu.com/3930-1/	Third Party Advisory
12	https://usn.ubuntu.com/3930-2/	Third Party Advisory
13	https://usn.ubuntu.com/3931-1/	Third Party Advisory
14	https://usn.ubuntu.com/3931-2/	Third Party Advisory
15	http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=979d63d50c0c0f7bc537bf821e056cc9fe5abd38	Patch Third Party Advisory
16	https://usn.ubuntu.com/3931-2/	Third Party Advisory
17	https://usn.ubuntu.com/3931-1/	Third Party Advisory
18	https://usn.ubuntu.com/3930-2/	Third Party Advisory
19	https://usn.ubuntu.com/3930-1/	Third Party Advisory
20	https://support.f5.com/csp/article/K43030517?utm_source=f5support&amp%3Butm_medium=RSS
21	https://support.f5.com/csp/article/K43030517
22	https://github.com/torvalds/linux/commit/d3bd7413e0ca40b60cf60d4003246d067cafdeda	Patch Third Party Advisory
23	https://github.com/torvalds/linux/commit/979d63d50c0c0f7bc537bf821e056cc9fe5abd38	Patch Third Party Advisory
24	https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.20.6	Third Party Advisory
25	https://bugs.chromium.org/p/project-zero/issues/detail?id=1711	Issue Tracking Patch Third Party Advisory
26	http://www.securityfocus.com/bid/106827	Third Party Advisory VDB Entry
27	http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00052.html	Third Party Advisory
28	http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=d3bd7413e0ca40b60cf60d4003246d067cafdeda	Patch Third Party Advisory

Common Vulnerabilities List

No	CWE	Name	URL
1	CWE-189	数値処理の問題	https://cwe.mitre.org/data/definitions/189.html

JVN Vulnerability Information

Linux Kernel における数値処理に関する脆弱性

Title	Linux Kernel における数値処理に関する脆弱性
Summary	Linux Kernel には、数値処理に関する脆弱性が存在します。
Possible impacts	情報を取得される、情報を改ざんされる、およびサービス運用妨害 (DoS) 状態に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	Jan. 31, 2019, midnight
Registration Date	March 28, 2019, 12:28 p.m.
Last Update	March 28, 2019, 12:28 p.m.

Affected System

Linux

Linux Kernel 4.20.6 未満

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-2019-7308	https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-7308
National Vulnerability Database (NVD)
2	CVE-2019-7308	https://nvd.nist.gov/vuln/detail/CVE-2019-7308

CWE (共通脆弱性タイプ一覧)

No	Name	URL
JVNDB
1	CWE-189	https://jvndb.jvn.jp/ja/cwe/CWE-189.html

ベンダー情報

No	Name	URL
ChangeLog
1	ChangeLog-4.20.6	https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.20.6
GitHub
2	bpf: fix sanitation of alu op with pointer / scalar type from differe…	https://github.com/torvalds/linux/commit/d3bd7413e0ca40b60cf60d4003246d067cafdeda
3	bpf: prevent out of bounds speculation on pointer arithmetic	https://github.com/torvalds/linux/commit/979d63d50c0c0f7bc537bf821e056cc9fe5abd38
Linux Kernel
4	Linux Kernel Archives	http://www.kernel.org
Linux kernel source tree
5	bpf: fix sanitation of alu op with pointer / scalar type from different paths	http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=d3bd7413e0ca40b60cf60d4003246d067cafdeda
6	bpf: prevent out of bounds speculation on pointer arithmetic	http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=979d63d50c0c0f7bc537bf821e056cc9fe5abd38

その他

No	Name	URL
関連文書
1	Issue 1711: Linux: eBPF Spectre v1 mitigation is insufficient	https://bugs.chromium.org/p/project-zero/issues/detail?id=1711

Change Log

No	Changed Details	Date of change
1	[2019年03月28日] 掲載	March 28, 2019, 12:28 p.m.