Linux kernel CIFS directory traversal

kernel-cifs-directory-traversal (26141) The risk level is classified as LowLow Risk

Description:

Linux kernel is vulnerable to a directory traversal in CIFS. A local attacker could send a specially-crafted request containing "dot dot" sequences (..\\) to traverse directories and escape chroot restrictions for an SMB-mounted file system.


Consequences:

Obtain Information

Remedy:

Upgrade to the latest stable version of Linux Kernel (2.6.16.11 or later), available from The Linux Kernel Archives. See References.

For Debian GNU/Linux:
Refer to DSA-1103-1 for patch, upgrade, or suggested workaround information. See References.

For SUSE Linux:
Refer to SUSE-SA:2006:028 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: ChangeLog-2.6.16.11.
  • The The Linux Kernel Archives Web site: The Linux Kernel Archives.
  • BID-17742: Linux Kernel CIFS CHRoot Security Restriction Bypass Vulnerability
  • CVE-2006-1863: Directory traversal vulnerability in CIFS in Linux 2.6.16 and earlier allows local users to escape chroot restrictions for an SMB-mounted filesystem via ..\\ sequences, a similar vulnerability to CVE-2006-1864.
  • DSA-1103: kernel-source-2.6.8 -- several vulnerabilities
  • MDKSA-2006:150: Updated kernel packages fix multiple vulnerabilities
  • MDKSA-2006:151: Updated kernel packages fix multiple vulnerabilities
  • OSVDB ID: 25068: Linux Kernel CIFS SMB Mount Traversal chroot Restriction Bypass
  • SA19868: Linux Kernel CIFS chroot Directory Traversal Vulnerability
  • SUSE-SA:2006:028: various kernel security problems
  • USN-302-1: Linux kernel vulnerabilities
  • VUPEN/ADV-2006-1542: Linux Kernel CIFS/SMB Mounted Filesystem Chroot Restriction Bypass Vulnerability

Platforms Affected:

  • Canonical Ubuntu 5.04
  • Canonical Ubuntu 5.10
  • Canonical Ubuntu 6.06 LTS
  • Debian Debian Linux 3.1
  • Linux Kernel 2.6.0 test7
  • Linux Kernel 2.6.0 test8
  • Linux Kernel 2.6.0 test9
  • Linux Kernel 2.6.0 test6
  • Linux Kernel 2.6.0 test5
  • Linux Kernel 2.6.0
  • Linux Kernel 2.6.0 test3
  • Linux Kernel 2.6.0 test2
  • Linux Kernel 2.6.0 test11
  • Linux Kernel 2.6.0 test10
  • Linux Kernel 2.6.0 test1
  • Linux Kernel 2.6.0 test4
  • Linux Kernel 2.6.1 rc1
  • Linux Kernel 2.6.1 rc2
  • Linux Kernel 2.6.1 rc3
  • Linux Kernel 2.6.1
  • Linux Kernel 2.6.10 rc2
  • Linux Kernel 2.6.10 rc3
  • Linux Kernel 2.6.10
  • Linux Kernel 2.6.10 rc1
  • Linux Kernel 2.6.11 rc2
  • Linux Kernel 2.6.11 rc3
  • Linux Kernel 2.6.11 rc4
  • Linux Kernel 2.6.11
  • Linux Kernel 2.6.11 rc5
  • Linux Kernel 2.6.11 rc1
  • Linux Kernel 2.6.11.1
  • Linux Kernel 2.6.11.10
  • Linux Kernel 2.6.11.11
  • Linux Kernel 2.6.11.12
  • Linux Kernel 2.6.11.2
  • Linux Kernel 2.6.11.3
  • Linux Kernel 2.6.11.4
  • Linux Kernel 2.6.11.5
  • Linux Kernel 2.6.11.6
  • Linux Kernel 2.6.11.7
  • Linux Kernel 2.6.11.8
  • Linux Kernel 2.6.11.9
  • Linux Kernel 2.6.12 rc6
  • Linux Kernel 2.6.12 rc5
  • Linux Kernel 2.6.12
  • Linux Kernel 2.6.12 rc4
  • Linux Kernel 2.6.12 rc3
  • Linux Kernel 2.6.12 rc2
  • Linux Kernel 2.6.12 rc1
  • Linux Kernel 2.6.12.1
  • Linux Kernel 2.6.12.12
  • Linux Kernel 2.6.12.2
  • Linux Kernel 2.6.12.22
  • Linux Kernel 2.6.12.3
  • Linux Kernel 2.6.12.4
  • Linux Kernel 2.6.12.5
  • Linux Kernel 2.6.12.6
  • Linux Kernel 2.6.13 rc6
  • Linux Kernel 2.6.13 rc7
  • Linux Kernel 2.6.13 rc5
  • Linux Kernel 2.6.13
  • Linux Kernel 2.6.13 rc4
  • Linux Kernel 2.6.13 rc3
  • Linux Kernel 2.6.13 rc2
  • Linux Kernel 2.6.13 rc1
  • 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 rc5
  • Linux Kernel 2.6.14 rc4
  • Linux Kernel 2.6.14 rc3
  • Linux Kernel 2.6.14 rc1
  • Linux Kernel 2.6.14
  • Linux Kernel 2.6.14 rc2
  • 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 rc4
  • Linux Kernel 2.6.15 rc5
  • Linux Kernel 2.6.15 rc6
  • Linux Kernel 2.6.15 rc7
  • Linux Kernel 2.6.15 rc1
  • Linux Kernel 2.6.15
  • Linux Kernel 2.6.15 rc2
  • Linux Kernel 2.6.15 rc3
  • Linux Kernel 2.6.15.1
  • Linux Kernel 2.6.15.11
  • 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 rc6
  • Linux Kernel 2.6.16 rc5
  • Linux Kernel 2.6.16 rc4
  • Linux Kernel 2.6.16 rc3
  • Linux Kernel 2.6.16
  • Linux Kernel 2.6.16 rc7
  • Linux Kernel 2.6.2 rc3
  • Linux Kernel 2.6.2
  • Linux Kernel 2.6.2 rc1
  • Linux Kernel 2.6.2 rc2
  • Linux Kernel 2.6.3 rc1
  • Linux Kernel 2.6.3 rc4
  • Linux Kernel 2.6.3 rc3
  • Linux Kernel 2.6.3 rc2
  • Linux Kernel 2.6.3
  • Linux Kernel 2.6.4
  • Linux Kernel 2.6.4 rc3
  • Linux Kernel 2.6.4 rc1
  • Linux Kernel 2.6.4 rc2
  • Linux Kernel 2.6.5 rc1
  • Linux Kernel 2.6.5 rc3
  • Linux Kernel 2.6.5
  • Linux Kernel 2.6.5 rc2
  • Linux Kernel 2.6.6 rc3
  • Linux Kernel 2.6.6 rc1
  • Linux Kernel 2.6.6
  • Linux Kernel 2.6.6 rc2
  • Linux Kernel 2.6.7
  • Linux Kernel 2.6.7 rc3
  • Linux Kernel 2.6.7 rc2
  • Linux Kernel 2.6.7 rc1
  • Linux Kernel 2.6.8 rc4
  • Linux Kernel 2.6.8 rc3
  • Linux Kernel 2.6.8 rc2
  • Linux Kernel 2.6.8 rc1
  • Linux Kernel 2.6.8
  • Linux Kernel 2.6.8.1
  • Linux Kernel 2.6.9 rc1
  • Linux Kernel 2.6.9
  • Linux Kernel 2.6.9 rc4
  • Linux Kernel 2.6.9 rc3
  • Linux Kernel 2.6.9 rc2
  • MandrakeSoft Mandrake Linux 2006 X86_64
  • MandrakeSoft Mandrake Linux 2006
  • MandrakeSoft Mandrake Linux Corporate Server 3.0 X86_64
  • MandrakeSoft Mandrake Linux Corporate Server 3.0
  • MandrakeSoft Mandrake Multi Network Firewall 2.0
  • Novell UnitedLinux 1.0
  • SuSE Linux Enterprise Server 8
  • SuSE Linux Enterprise Server 9
  • SUSE SuSE Linux 10.0
  • SUSE SuSE Linux 9.1
  • SUSE SuSE Linux 9.2
  • SUSE SuSE Linux 9.3
  • SuSE SuSE SLES 9

Reported:

Apr 24, 2006

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