Linux kernel dm-crypt information disclosure

kernel-dmcrypt-information-disclosure (24189) The risk level is classified as MediumMedium Risk

Description:

Linux kernel could disclose sensitive information. The dm-crypt driver fails to clear memory contents before releasing it, allow a local attacker to obtain sensitive information related to cryptographic keys.


Consequences:

Obtain Information

Remedy:

Upgrade to the latest stable version of Linux Kernel (2.6.15-git12 or later), available from The Linux Kernel Archives Web page. See References.

For Debian GNU/Linux:
Refer to DSA-1017-1 for patch, upgrade, or suggested workaround information. See References.

For Red Hat Linux:
Refer to RHSA-2006:0132-31 for patch, upgrade, or suggested workaround information. See References.

For Ubuntu Linux:
Refer to USN-244-1 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 The Linux Kernel Archives Web page: The Linux Kernel Archives.
  • BID-16301: Linux Kernel DM-Crypt Local Information Disclosure Vulnerability
  • CVE-2006-0095: dm-crypt in Linux kernel 2.6.15 and earlier does not clear a structure before it is freed, which leads to a memory disclosure that could allow local users to obtain sensitive information about a cryptographic key.
  • DSA-1017: kernel-source-2.6.8 -- several vulnerabilities
  • MDKSA-2006:040: Updated kernel packages fix multiple vulnerabilities
  • OSVDB ID: 22418: Linux Kernel dm-crypt crypt_config Structure Cryptographic Key Local Disclosure
  • RHSA-2006-0132: Updated kernel packages available for Red Hat Enterprise Linux 4 Update 3
  • SA18487: Linux Kernel Information Disclosure and Denial of Service
  • SECTRACK ID: 1015740: Linux Kernel dm-crypt Fails to Clear Key Storage
  • SUSE-SA:2006:028: various kernel security problems
  • USN-244-1: Linux kernel vulnerabilities

Platforms Affected:

  • Canonical Ubuntu 4.10
  • Canonical Ubuntu 5.04
  • Canonical Ubuntu 5.10
  • Debian Debian Linux 3.1
  • Linux Kernel 2.6.0
  • Linux Kernel 2.6.1
  • Linux Kernel 2.6.10
  • Linux Kernel 2.6.11
  • 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
  • Linux Kernel 2.6.12.1
  • Linux Kernel 2.6.12.2
  • Linux Kernel 2.6.12.3
  • Linux Kernel 2.6.12.4
  • Linux Kernel 2.6.13
  • Linux Kernel 2.6.14
  • Linux Kernel 2.6.14 rc2
  • Linux Kernel 2.6.14 rc1
  • Linux Kernel 2.6.14 rc3
  • Linux Kernel 2.6.14 rc4
  • Linux Kernel 2.6.15 rc7
  • Linux Kernel 2.6.15 rc6
  • Linux Kernel 2.6.15 rc5
  • Linux Kernel 2.6.15 rc4
  • Linux Kernel 2.6.15 rc3
  • Linux Kernel 2.6.15 rc1
  • Linux Kernel 2.6.15 rc2
  • Linux Kernel 2.6.3
  • Linux Kernel 2.6.4
  • Linux Kernel 2.6.5
  • Linux Kernel 2.6.6
  • Linux Kernel 2.6.7
  • Linux Kernel 2.6.8
  • Linux Kernel 2.6.8.1
  • Linux Kernel 2.6.9
  • Linux Linux Kernel 2.6.14.1
  • Linux Linux Kernel 2.6.14.2
  • Linux Linux Kernel 2.6.14.3
  • Linux Linux Kernel 2.6.14.4
  • Linux Linux Kernel 2.6.15
  • Linux Linux Kernel 2.6.2
  • MandrakeSoft Mandrake Linux 2006 X86_64
  • MandrakeSoft Mandrake Linux 2006
  • Novell UnitedLinux 1.0
  • RedHat Enterprise Linux 4 ES
  • RedHat Enterprise Linux 4 WS
  • RedHat Enterprise Linux 4 AS
  • RedHat Enterprise Linux 4 Desktop
  • 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 Linux Desktop 1.0
  • SuSE SuSE SLES 9

Reported:

Jan 17, 2006

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