Linux Kernel make_indexed_dir() ext4 denial of service

linux-kernel-makeindexeddir-ext4-dos (48872)

Medium Risk

Description:

Linux Kernel is vulnerable to a denial of service, caused by an error in the make_indexed_dir() function. A local attacker could exploit this vulnerability using the specially-crafted ext4 file system to cause a denial of service.

*CVSS:

Base Score:	2.1
Access Vector:	Local
Access Complexity:	Low
Authentication:	None
Confidentiality Impact:	None
Integrity Impact:	None
Availability Impact:	Partial
Temporal Score:	1.6
Exploitability:	Unproven
Remediation Level:	Official-Fix
Report Confidence:	Confirmed

Consequences:

Denial of Service

Remedy:

Upgrade to the latest version of Linux Kernel (2.6.27.19 or 2.6.28.7 or later), available from the The Linux Kernel Archives Web site. See References.

References:

• Kernel Bug Tracker Bug 12371: oops in ext4_get_group_desc.
• Kernel Bug Tracker Bug 12430: different oops & panic on accessing an intentionally corrupted ext4 fs image.
• The Linux Kernel Archives Web site: ChangeLog-2.6.27.19.
• The Linux Kernel Archives Web site: ChangeLog-2.6.28.7.
• CVE-2009-0746: The make_indexed_dir function in fs/ext4/namei.c in the Linux kernel 2.6.27 before 2.6.27.19 and 2.6.28 before 2.6.28.7 does not validate a certain rec_len field, which allows local users to cause a denial of service (OOPS) by attempting to mount a crafted ext4 filesystem.
• DSA-1749: linux-2.6 -- denial of service/privilege escalation/sensitive memory leak
• RHSA-2009-1243: Important: Red Hat Enterprise Linux 5.4 kernel security and bug fix update
• SA33977: Linux Kernel Denial of Service Vulnerabilities
• USN-751-1: Linux kernel vulnerabilities
• VUPEN/ADV-2009-0509: Linux Kernel Ext4 Filesystem Local Denial of Service Vulnerabilities
• VUPEN/ADV-2009-3316: VMware Products Multiple Code Execution and Security Bypass Issues

Platforms Affected:

• Canonical Ubuntu 7.10
• Canonical Ubuntu 8.04 LTS
• Canonical Ubuntu 8.10
• Debian Debian Linux 5.0
• Linux Kernel 2.6.0
• Linux Kernel 2.6.21.6
• Linux Kernel 2.6.21.7
• Linux Kernel 2.6.22 rc7
• Linux Kernel 2.6.22 rc1
• Linux Kernel 2.6.22.11
• Linux Kernel 2.6.22.12
• Linux Kernel 2.6.22.13
• Linux Kernel 2.6.22.14
• Linux Kernel 2.6.22.15
• Linux Kernel 2.6.22.17
• Linux Kernel 2.6.22.2
• Linux Kernel 2.6.22.8
• Linux Kernel 2.6.22.9
• Linux Kernel 2.6.23.6
• Linux Kernel 2.6.23.7
• Linux Kernel 2.6.24 rc5
• Linux Kernel 2.6.24
• Linux Kernel 2.6.24 git13
• Linux Kernel 2.6.24 rc4
• Linux Kernel 2.6.24 rc3
• Linux Kernel 2.6.24.1
• Linux Kernel 2.6.24.2
• Linux Kernel 2.6.25
• Linux Kernel 2.6.25.10
• Linux Kernel 2.6.25.11
• Linux Kernel 2.6.25.12
• Linux Kernel 2.6.25.13
• Linux Kernel 2.6.25.15
• Linux Kernel 2.6.25.5
• Linux Kernel 2.6.25.6
• Linux Kernel 2.6.25.7
• Linux Kernel 2.6.25.8
• Linux Kernel 2.6.25.9
• Linux Kernel 2.6.26
• Linux Kernel 2.6.26.3
• Linux Kernel 2.6.26.4
• Linux Kernel 2.6.26.5
• Linux Kernel 2.6.27 rc2
• Linux Kernel 2.6.27 rc9
• Linux Kernel 2.6.27 rc8-git5
• Linux Kernel 2.6.27 rc8
• Linux Kernel 2.6.27
• Linux Kernel 2.6.27 rc6-git6
• Linux Kernel 2.6.27 rc6
• Linux Kernel 2.6.27 rc5
• Linux Kernel 2.6.27 rc4
• Linux Kernel 2.6.27 rc1
• Linux Kernel 2.6.27 rc3
• Linux Kernel 2.6.27 rc7
• Linux Kernel 2.6.27.1
• Linux Kernel 2.6.27.10
• Linux Kernel 2.6.27.12
• Linux Kernel 2.6.27.14
• Linux Kernel 2.6.27.2
• Linux Kernel 2.6.27.3
• Linux Kernel 2.6.27.4
• Linux Kernel 2.6.27.5
• Linux Kernel 2.6.27.6
• Linux Kernel 2.6.27.7
• Linux Kernel 2.6.27.8
• Linux Kernel 2.6.27.9
• Linux Kernel 2.6.28 rc4
• Linux Kernel 2.6.28 rc3
• Linux Kernel 2.6.28
• Linux Kernel 2.6.28 git7
• Linux Kernel 2.6.28 rc1
• Linux Kernel 2.6.28 rc5
• Linux Kernel 2.6.28 rc6
• Linux Kernel 2.6.28 rc7
• Linux Kernel 2.6.28 rc2
• Linux Kernel 2.6.28.1
• Linux Kernel 2.6.28.2
• Linux Kernel 2.6.28.3
• Linux Kernel 2.6.28.4
• Linux Kernel 2.6.28.5
• Linux Kernel 2.6.8.1
• Linux Linux Kernel 2.6.18
• Linux Linux Kernel 2.6.18.1
• Linux Linux Kernel 2.6.18.3
• Linux Linux Kernel 2.6.18.4
• Linux Linux Kernel 2.6.20.15
• Linux Linux Kernel 2.6.20.4
• Linux Linux Kernel 2.6.20.5
• Linux Linux Kernel 2.6.20.8
• Linux Linux Kernel 2.6.20.9
• Linux Linux Kernel 2.6.21.1
• Linux Linux Kernel 2.6.21.2
• Linux Linux Kernel 2.6.21.4
• Linux Linux Kernel 2.6.22
• Linux Linux Kernel 2.6.22.1
• Linux Linux Kernel 2.6.22.3
• Linux Linux Kernel 2.6.22.4
• Linux Linux Kernel 2.6.22.5
• Linux Linux Kernel 2.6.22.6
• Linux Linux Kernel 2.6.22.7
• Linux Linux Kernel 2.6.23
• Linux Linux Kernel 2.6.23 rc2
• Linux Linux Kernel 2.6.23 rc1
• Linux Linux Kernel 2.6.23.2
• Linux Linux Kernel 2.6.23.3
• Linux Linux Kernel 2.6.23.4
• Linux Linux Kernel 2.6.23.5
• RedHat Enterprise Linux 5
• RedHat Enterprise Linux 5 Client

Reported:

Feb 20, 2009

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