Linux kernel nfsaclsvc_release_getacl() function denial of service

kernel-nfsaclsvc-dos (32578)

Low Risk

Description:

Linux kernel is vulnerable to a denial of service. The nfsaclsvc_release_getacl() function releases an improper pointer when handling NFSACL 2 "ACCESS" requests. An attacker could exploit this vulnerability to crash the system, resulting in a denial of service.

*CVSS:

Base Score:	5
Access Vector:	Remote
Access Complexity:	Low
Authentication:	Not Required
Confidentiality Impact:	None
Integrity Impact:	None
Availability Impact:	Complete
Temporal Score:	3.7
Exploitability:	Unproven
Remediation Level:	Official-Fix
Report Confidence:	Confirmed

Consequences:

Denial of Service

Remedy:

Upgrade to the latest version of Linux kernel (2.6.18.7 or later), (2.6.19.4 or later), or (2.6.20.1 or later), available from The Linux Kernel Archives Web site. See References.

For Mandriva Linux (kernel):
Refer to MDKSA-2007:060 for patch, upgrade, or suggested workaround information. See References.

For SUSE Linux (kernel):
Refer to SUSE-SA:2007:018 for patch, upgrade, or suggested workaround information. See References.

For SUSE Linux (kernel):
Refer to SUSE-SA:2007:021 for patch, upgrade, or suggested workaround information. See References.

For Ubuntu Linux (linux-source):
Refer to USN-451-1 for patch, upgrade, or suggested workaround information. See References.

For Mandriva Linux (kernel):
Refer to MDKSA-2007:078 for patch, upgrade, or suggested workaround information. See References.

For other distributions:
Contact your vendor for upgrade or patch information.

References:

• The Linux Kernel Archives Web site: ChangeLog-2.6.20.1.
• The Linux Kernel Archives Web site: ChangeLog-2.6.19.4.
• The Linux Kernel Archives Web site: ChangeLog-2.6.18.7.
• The The Linux Kernel Archives Web site: The Linux Kernel Archives.
• BID-22625: Linux Kernel NFSACL Denial of Service Vulnerability
• CVE-2007-0772: The Linux kernel 2.6.13 and other versions before 2.6.20.1 allows remote attackers to cause a denial of service (oops) via a crafted NFSACL 2 ACCESS request that triggers a free of an incorrect pointer.
• MDKSA-2007:060: Updated kernel packages fix multiple vulnerabilities and bugs
• MDKSA-2007:078: Updated kernel packages fix multiple vulnerabilities and bugs
• SA24215: Linux Kernel NFSACL "ACCESS" Denial of Service
• SUSE-SA:2007:018: Linux kernel security update
• SUSE-SA:2007:021: Linux kernel security problems
• USN-451-1: Linux kernel vulnerabilities
• VUPEN/ADV-2007-0660: Linux Kernel NFSACL nfsaclsvc_release_getacl() Function Denial of Service Issue

Platforms Affected:

• Canonical Ubuntu 6.06 LTS
• Canonical Ubuntu 6.10
• Linux Kernel 2.6.13.1
• Linux Kernel 2.6.13.2
• Linux Kernel 2.6.13.3
• Linux Kernel 2.6.13.4
• Linux Kernel 2.6.13.5
• Linux Kernel 2.6.14
• Linux Kernel 2.6.14.1
• Linux Kernel 2.6.14.2
• Linux Kernel 2.6.14.3
• Linux Kernel 2.6.14.4
• Linux Kernel 2.6.14.5
• Linux Kernel 2.6.14.6
• Linux Kernel 2.6.14.7
• Linux Kernel 2.6.15
• Linux Kernel 2.6.15.1
• Linux Kernel 2.6.15.2
• Linux Kernel 2.6.15.3
• Linux Kernel 2.6.15.4
• Linux Kernel 2.6.15.5
• Linux Kernel 2.6.15.6
• Linux Kernel 2.6.15.7
• Linux Kernel 2.6.16
• Linux Kernel 2.6.16.1
• Linux Kernel 2.6.16.10
• Linux Kernel 2.6.16.11
• Linux Kernel 2.6.16.12
• Linux Kernel 2.6.16.13
• Linux Kernel 2.6.16.14
• Linux Kernel 2.6.16.15
• Linux Kernel 2.6.16.16
• Linux Kernel 2.6.16.17
• Linux Kernel 2.6.16.18
• Linux Kernel 2.6.16.19
• Linux Kernel 2.6.16.2
• Linux Kernel 2.6.16.20
• Linux Kernel 2.6.16.21
• Linux Kernel 2.6.16.22
• Linux Kernel 2.6.16.23
• Linux Kernel 2.6.16.24
• Linux Kernel 2.6.16.25
• Linux Kernel 2.6.16.26
• Linux Kernel 2.6.16.27
• Linux Kernel 2.6.16.28
• Linux Kernel 2.6.16.29
• Linux Kernel 2.6.16.3
• Linux Kernel 2.6.16.30
• Linux Kernel 2.6.16.31
• Linux Kernel 2.6.16.32
• Linux Kernel 2.6.16.33
• Linux Kernel 2.6.16.34
• Linux Kernel 2.6.16.35
• Linux Kernel 2.6.16.36
• Linux Kernel 2.6.16.37
• Linux Kernel 2.6.16.38
• Linux Kernel 2.6.16.39
• Linux Kernel 2.6.16.4
• Linux Kernel 2.6.16.40
• Linux Kernel 2.6.16.41
• Linux Kernel 2.6.16.43
• Linux Kernel 2.6.16.44
• Linux Kernel 2.6.16.45
• Linux Kernel 2.6.16.46
• Linux Kernel 2.6.16.47
• Linux Kernel 2.6.16.48
• Linux Kernel 2.6.16.49
• Linux Kernel 2.6.16.5
• Linux Kernel 2.6.16.50
• Linux Kernel 2.6.16.51
• Linux Kernel 2.6.16.52
• Linux Kernel 2.6.16.53
• Linux Kernel 2.6.16.6
• Linux Kernel 2.6.16.7
• Linux Kernel 2.6.16.8
• Linux Kernel 2.6.16.9
• Linux Kernel 2.6.17
• Linux Kernel 2.6.17.1
• Linux Kernel 2.6.17.10
• Linux Kernel 2.6.17.11
• Linux Kernel 2.6.17.12
• Linux Kernel 2.6.17.13
• Linux Kernel 2.6.17.14
• Linux Kernel 2.6.17.2
• Linux Kernel 2.6.17.3
• Linux Kernel 2.6.17.4
• Linux Kernel 2.6.17.5
• Linux Kernel 2.6.17.6
• Linux Kernel 2.6.17.7
• Linux Kernel 2.6.17.8
• Linux Kernel 2.6.17.9
• Linux Kernel 2.6.18
• Linux Kernel 2.6.18.1
• Linux Kernel 2.6.18.2
• Linux Kernel 2.6.18.3
• Linux Kernel 2.6.18.4
• Linux Kernel 2.6.18.5
• Linux Kernel 2.6.18.6
• Linux Kernel 2.6.19.1
• Linux Kernel 2.6.19.2
• Linux Kernel 2.6.19.3
• Linux Kernel 2.6.20
• MandrakeSoft Mandrake Linux 2006
• MandrakeSoft Mandrake Linux 2006 X86_64
• MandrakeSoft Mandrake Linux 2007
• MandrakeSoft Mandrake Linux 2007 X86_64
• MandrakeSoft Mandrake Linux Corporate Server 4.0 X86_64
• MandrakeSoft Mandrake Linux Corporate Server 4.0
• Novell OpenSUSE 10.2
• SUSE SuSE Linux 10.0
• SUSE SuSE Linux 10.1
• SuSE SuSE SLE 10 DEBUGINFO
• SuSE SuSE SLED 10
• SuSE SuSE SLES 10
• SuSE SuSE SLES 9

Reported:

Feb 20, 2007

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