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Linux Kernel Multiple Vulnerabilities

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Release Date:  2009-08-14    Last Update:  2009-08-20    Views:  5,653

Secunia Advisory SA36278

Where:

From remote

Impact:

Privilege escalation, DoS

Solution Status:

Vendor Patch

Operating System:

CVE Reference(s):

Description


Some vulnerabilities have been reported in the Linux Kernel, which can be exploited by malicious, local users to cause a DoS (Denial of Service) and potentially gain escalated privileges, and by malicious people to cause a DoS.

1) A vulnerability is caused due to the incorrect initialisation of the proto_ops structure for certain protocols (e.g. PF_APPLETALK, PF_IPX, PF_IRDA, PF_X25, PF_AX25 families, PF_BLUETOOTH, PF_IUCV, PF_INET6 (with IPPROTO_SCTP), PF_PPPOX, and PF_ISDN), which can be exploited to cause a NULL pointer dereference when triggering the "sock_sendpage()" function for an incorrectly initialised socket.

2) A NULL pointer dereference exists within the "cmp_ies()" function in net/wireless/scan.c. This can be exploited to crash a vulnerable system by tricking it into scanning and processing specially crafted SSID IEs.

3) A NULL pointer dereference exists within the "load_flat_shared_library()" function in fs/binfmt_flat.c, which can be exploited to cause a crash and potentially execute arbitrary code with root privileges.


Solution:
Update to version 2.6.30.5.

Provided and/or discovered by:
1) Tavis Ormandy and Julien Tinnes, Google Security Team
2) Reported by the vendor.
3) Bernd Schmidt

Original Advisory:
http://archives.neohapsis.com/archives/fulldisclosure/2009-08/0174.html
http://blog.cr0.org/2009/08/linux-null-pointer-dereference-due-to.html
http://kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.30.5

Deep Links:
Links available to Secunia VIM customers

Do you have additional information related to this advisory?

Please provide information about patches, mitigating factors, new versions, exploits, faulty patches, links, and other relevant data by posting comments to this Advisory. You can also send this information to vuln@secunia.com

Subject: Linux Kernel Multiple Vulnerabilities

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