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Vulnerability of Linux kernel: buffer overflow via CIFS

Synthesis of the vulnerability 

An attacker can setup a malicious CIFS server and invite the victim to mount a share in order to generate an overflow in the kernel.
Impacted software: Debian, Fedora, Linux, NLD, OES, openSUSE, RHEL, SLES, ESX, ESXi, VMware Server, vCenter Server, VirtualCenter.
Severity of this computer vulnerability: 2/4.
Creation date: 06/04/2009.
Références of this announce: BID-34453, CERTA-2002-AVI-235, CVE-2009-1439, DSA-1787-1, DSA-1794-1, DSA-1800-1, FEDORA-2009-5356, FEDORA-2009-5383, RHSA-2009:1081-01, RHSA-2009:1106-01, RHSA-2009:1211-01, SUSE-SA:2009:028, SUSE-SA:2009:030, SUSE-SA:2009:031, SUSE-SA:2009:032, SUSE-SA:2009:033, SUSE-SU-2011:0928-1, VIGILANCE-VUL-8602, VMSA-2009-0016, VMSA-2009-0016.1, VMSA-2009-0016.2, VMSA-2009-0016.3, VMSA-2009-0016.4, VMSA-2009-0016.5.

Description of the vulnerability 

The fs/cifs directory of the Linux kernel source code implements a CIFS/SMB client, used to mount a filesystem on a remote share.

The CIFSTCon() function of the fs/cifs/connect.c file implements the TreeConnectAndX command. The answer to this command contains the "nativeFileSystem" field whose value is generally NTFS, FAT or SAMBA.

However, if the nativeFileSystem field is too long, a buffer overflow occurs in the CIFSTCon() function.

An attacker can therefore setup a malicious CIFS server and invite the victim to mount a share in order to generate an overflow in the kernel.
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This cybersecurity threat impacts software or systems such as Debian, Fedora, Linux, NLD, OES, openSUSE, RHEL, SLES, ESX, ESXi, VMware Server, vCenter Server, VirtualCenter.

Our Vigil@nce team determined that the severity of this computer threat note is medium.

The trust level is of type confirmed by the editor, with an origin of intranet server.

An attacker with a expert ability can exploit this security threat.

Solutions for this threat 

Linux kernel: version 2.6.30.
Version 2.6.30 is corrected:
  ftp://ftp.kernel.org/pub/linux/kernel/v2.6/

Linux kernel: version 2.6.29.1.
Version 2.6.29.1 is corrected:
  http://www.kernel.org/pub/linux/kernel/v2.6/

Linux kernel: version 2.6.28.10.
Version 2.6.28.10 is corrected:
  http://www.kernel.org/pub/linux/kernel/v2.6/

Linux kernel: version 2.6.27.22.
Version 2.6.27.22 is corrected:
  http://www.kernel.org/pub/linux/kernel/v2.6/

VMware ESX, ESXi, VirtualCenter: solution.
Following version is corrected:
VirtualCenter 4.0 Update 1
  http://downloads.vmware.com/download/download.do?downloadGroup=VC40U1
VMware Virtual Center 2.5 Update 6
  http://downloads.vmware.com/download/download.do?downloadGroup=VC250U6
ESXi 4.0 Update 1
  https://hostupdate.vmware.com/software/VUM/OFFLINE/release-155-20091116-013169/ESXi-4.0.0-update01.zip
ESXi 3.5
  http://download3.vmware.com/software/vi/ESXe350-201002401-O-SG.zip
ESX 4.0 Update 1
  https://hostupdate.vmware.com/software/VUM/OFFLINE/release-158-20091118-187517/ESX-4.0.0-update01.zip
  known problems: http://kb.vmware.com/kb/1016070
ESX 3.5
  http://download3.vmware.com/software/vi/ESX350-201002407-SG.zip
  http://download3.vmware.com/software/vi/ESX350-201002402-SG.zip
  http://download3.vmware.com/software/vi/ESX350-201002404-SG.zip
  http://download3.vmware.com/software/vi/ESX350-201003403-SG.zip
ESX 3.0.3
  http://download3.vmware.com/software/vi/ESX303-201002204-UG.zip
  http://download3.vmware.com/software/vi/ESX303-201002206-UG.zip
  http://download3.vmware.com/software/vi/ESX303-201002205-UG.zip

Debian 4: new linux-2.6.24 packages.
New packages are available:
  http://security.debian.org/pool/updates/main/l/linux-2.6.24/linux-*-2.6.24_2.6.24-6~etchnhalf.8etch1_*.deb

Debian 4: new linux-2.6 packages.
New packages are available:
  http://security.debian.org/pool/updates/main/l/linux-2.6/*_2.6.18.dfsg.1-24etch1_*.deb

Debian 5: new linux-2.6 packages.
New packages are available:
  http://security.debian.org/pool/updates/main/l/linux-2.6/*-2.6.26_2.6.26-15lenny2_*.deb

Fedora: new kernel packages (26/05/2009).
New packages are available:
  kernel-2.6.27.24-78.2.53.fc9
  kernel-2.6.27.24-170.2.68.fc10

openSUSE 10.3: new kernel packages.
New packages are available:
  http://download.opensuse.org/update/10.3/rpm/*/kernel-*-2.6.22.19-0.3.*.rpm

openSUSE 11.0: new kernel packages.
New packages are available:
  http://download.opensuse.org/update/11.0/rpm/*/kernel-*-2.6.25.20-0.4.*.rpm

openSUSE 11.1, SLE 11: new kernel packages.
New packages are available.

RHEL 4: new kernel packages.
New packages are available:
Red Hat Enterprise Linux version 4: kernel-2.6.9-89.0.7.EL

RHEL 5 MRG: new kernel-rt packages.
New packages are available:
MRG Realtime for RHEL 5 Server:
  kernel-rt-2.6.24.7-117.el5rt

RHEL 5: new kernel packages.
New packages are available:
Red Hat Enterprise Linux version 5: kernel-2.6.18-128.1.14.el5

SUSE 9: new kernel packages.
New packages are available.

SUSE LE 9: new kernel packages (23/08/2011).
New packages are available:
http://download.novell.com/patch/finder/?keywords=c05dae2ea95bb787f18166cf12f585e3

SUSE: new kernel packages.
New packages are available, as indicated in information sources.
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