NVD Vulnerability Detail

CVE-2011-2928

Summary	The befs_follow_link function in fs/befs/linuxvfs.c in the Linux kernel before 3.1-rc3 does not validate the length attribute of long symlinks, which allows local users to cause a denial of service (incorrect pointer dereference and OOPS) by accessing a long symlink on a malformed Be filesystem.
Publication Date	Aug. 30, 2011, 2:55 a.m.
Registration Date	Jan. 28, 2021, 4:39 p.m.
Last Update	Nov. 21, 2024, 10:29 a.m.

CVSS2.0 : MEDIUM
Score	4.9
Vector	AV:L/AC:L/Au:N/C:N/I:N/A:C
攻撃元区分(AV)	ローカル
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)	なし
完全性への影響(I)	なし
可用性への影響(A)	高
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:3.1:rc1::::::
cpe:2.3:o:linux:linux_kernel:3.1:rc2::::::
cpe:2.3:o:linux:linux_kernel::::::::				3.1
cpe:2.3:o:linux:linux_kernel:3.1:-::::::

Related information, measures and tools

No	URL	タグ
1	http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=338d0f0a6fbc82407864606f5b64b75aeb3c70f2
2	http://securityreason.com/securityalert/8360	Exploit Third Party Advisory
3	http://www.kernel.org/pub/linux/kernel/v3.0/testing/ChangeLog-3.1-rc3	Broken Link
4	http://www.openwall.com/lists/oss-security/2011/08/19/1	Exploit Mailing List Patch Third Party Advisory
5	http://www.openwall.com/lists/oss-security/2011/08/19/5	Exploit Mailing List Patch Third Party Advisory
6	http://www.pre-cert.de/advisories/PRE-SA-2011-06.txt	Exploit Third Party Advisory
7	http://www.securityfocus.com/archive/1/519387/100/0/threaded	Exploit Third Party Advisory VDB Entry
8	http://www.securityfocus.com/bid/49256	Third Party Advisory VDB Entry
9	https://exchange.xforce.ibmcloud.com/vulnerabilities/69343	Third Party Advisory VDB Entry
10	http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=338d0f0a6fbc82407864606f5b64b75aeb3c70f2
11	https://exchange.xforce.ibmcloud.com/vulnerabilities/69343	Third Party Advisory VDB Entry
12	http://www.securityfocus.com/bid/49256	Third Party Advisory VDB Entry
13	http://www.securityfocus.com/archive/1/519387/100/0/threaded	Exploit Third Party Advisory VDB Entry
14	http://www.pre-cert.de/advisories/PRE-SA-2011-06.txt	Exploit Third Party Advisory
15	http://www.openwall.com/lists/oss-security/2011/08/19/5	Exploit Mailing List Patch Third Party Advisory
16	http://www.openwall.com/lists/oss-security/2011/08/19/1	Exploit Mailing List Patch Third Party Advisory
17	http://www.kernel.org/pub/linux/kernel/v3.0/testing/ChangeLog-3.1-rc3	Broken Link
18	http://securityreason.com/securityalert/8360	Exploit Third Party Advisory

Common Vulnerabilities List

No	CWE	Name	URL
1	CWE-476	NULL ポインタデリファレンス	https://cwe.mitre.org/data/definitions/476.html

JVN Vulnerability Information

Linux kernel の befs_follow_link 関数におけるサービス運用妨害 (DoS) の脆弱性

Title	Linux kernel の befs_follow_link 関数におけるサービス運用妨害 (DoS) の脆弱性
Summary	Linux kernel のfs/befs/linuxvfs.c の befs_follow_link 関数は、過度に長いシンボリックリンクのレングス属性を検証しないため、サービス運用妨害 (不完全なポインタデリファレンスおよび OOPS) 状態となる脆弱性が存在します。
Possible impacts	ローカルユーザにより、不正な形式の Be ファイルシステム上の長いシンボリックリンクへのアクセスを介して、サービス運用妨害 (不完全なポインタデリファレンスおよび OOPS) 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	Aug. 29, 2011, midnight
Registration Date	March 27, 2012, 6:43 p.m.
Last Update	March 27, 2012, 6:43 p.m.

Affected System

Linux

Linux Kernel 3.1-rc3 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-2011-2928	http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-2928
National Vulnerability Database (NVD)
2	CVE-2011-2928	http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2011-2928

CWE (共通脆弱性タイプ一覧)

No	Name	URL
JVNDB
1	CWE-20	https://jvndb.jvn.jp/ja/cwe/CWE-20.html

ベンダー情報

No	Name	URL
Linux
1	Linux Kernel Archives	http://www.kernel.org/

Change Log

No	Changed Details	Date of change
0	[2012年03月27日] 掲載	Feb. 17, 2018, 10:37 a.m.