Linux kernel random number generator weak security

kernel-randomnumber-weak-security (34781) The risk level is classified as MediumMedium Risk

Description:

Linux kernel could provide weaker than expected security, caused by the improper handling of seeds for the random number generator. A remote attacker could exploit this vulnerability to bypass security restrictions and gain unauthorized access to the applications.

*CVSS:

Base Score: 7
  Access Vector: Remote
  Access Complexity: Low
  Authentication: Not Required
  Confidentiality Impact: Partial
  Integrity Impact: Partial
  Availability Impact: Partial
 
Temporal Score: 5.2
  Exploitability: Unproven
  Remediation Level: Official-Fix
  Report Confidence: Confirmed

Consequences:

Bypass Security

Remedy:

Upgrade to the latest version of the Linux kernel (2.6.21.4 or later), available from the Linux Kernel Web site. See References.

For Ubuntu Linux (linux-source):
Refer to USN-470-1 and USN-489-1 for patch, upgrade, or suggested workaround information. See References.

For Red Hat Linux (kernel):
Refer to RHSA-2007:0376 for patch, upgrade, or suggested workaround information. See References.

For Debian GNU/Linux (linux-2.6):
Refer to DSA-1356-1 for patch, upgrade, or suggested workaround information. See References.

For Mandriva Linux (kernel):
Refer to MDKSA-2007:171 for patch, upgrade, or suggested workaround information. See References.

For SUSE Linux (kernel):
Refer to SUSE-SA:2007:051 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-2.6.21.4.
  • BID-24390: Linux Kernel PRNG Entropy Weakness
  • BID-25029: Linux Kernel Random.C Device Reseed Weakness
  • CVE-2007-2453: The random number feature in Linux kernel 2.6 before 2.6.20.13, and 2.6.21.x before 2.6.21.4, (1) does not properly seed pools when there is no entropy, or (2) uses an incorrect cast when extracting entropy, which might cause the random number generator to provide the same values after reboots on systems without an entropy source.
  • DSA-1356: linux-2.6 -- several vulnerabilities
  • MDKSA-2007:171: Updated kernel packages fix multiple vulnerabilities and bugs
  • MDKSA-2007:196: Updated kernel packages fix multiple vulnerabilities and bugs
  • MDKSA-2007:216: Updated kernel packages fix multiple vulnerabilities and bugs
  • OpenPKG-SA-2007.012: Samba
  • OSVDB ID: 37114: Linux Kernel Random Number Generator Multiple Weaknesses
  • RHSA-2007-0376: Important: kernel security and bug fix update
  • SA25594: Linux Kernel Multiple Vulnerabilities
  • SECTRACK ID: 1018248: Linux Kernel Random Number Generator May Not Generate Random Numbers in Certain Situations
  • SUSE-SA:2007:043: Linux kernel update
  • SUSE-SA:2007:051: Linux kernel security update
  • USN-470-1: Linux kernel vulnerabilities
  • USN-486-1: Linux kernel vulnerabilities
  • USN-489-1: Linux kernel vulnerabilities

Platforms Affected:

  • Canonical Ubuntu 6.06 LTS
  • Canonical Ubuntu 6.10
  • Canonical Ubuntu 7.04
  • Debian Debian Linux 4.0
  • Linux Kernel 2.6.0 test9-cvs
  • Linux Kernel 2.6.0 test9
  • Linux Kernel 2.6.0 test8
  • Linux Kernel 2.6.0 test7
  • Linux Kernel 2.6.0 test6
  • Linux Kernel 2.6.0 test5
  • Linux Kernel 2.6.0 test4
  • 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
  • Linux Kernel 2.6.1 rc3
  • Linux Kernel 2.6.1 rc2
  • Linux Kernel 2.6.1 rc1
  • Linux Kernel 2.6.1
  • Linux Kernel 2.6.10 rc2
  • Linux Kernel 2.6.10 rc1
  • Linux Kernel 2.6.10 rc3
  • Linux Kernel 2.6.10
  • Linux Kernel 2.6.11 rc1
  • Linux Kernel 2.6.11 rc2
  • Linux Kernel 2.6.11 rc1-bk6
  • Linux Kernel 2.6.11 rc4
  • Linux Kernel 2.6.11 rc3
  • Linux Kernel 2.6.11 rc5
  • 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 rc1
  • Linux Kernel 2.6.12 rc6
  • Linux Kernel 2.6.12 rc5
  • Linux Kernel 2.6.12 rc4
  • Linux Kernel 2.6.12 rc2
  • Linux Kernel 2.6.12 rc3
  • Linux Kernel 2.6.12
  • 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 rc7
  • Linux Kernel 2.6.13 rc6
  • Linux Kernel 2.6.13 rc5
  • 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
  • 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 rc2
  • Linux Kernel 2.6.14 rc1
  • Linux Kernel 2.6.14
  • Linux Kernel 2.6.14 rc4
  • Linux Kernel 2.6.14 rc3
  • Linux Kernel 2.6.14 rc5
  • 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 2.6.15.11
  • Linux Kernel 2.6.16 rc7
  • Linux Kernel 2.6.17 rc1
  • Linux Kernel 2.6.17 rc5
  • Linux Kernel 2.6.17 rc4
  • Linux Kernel 2.6.17 rc3
  • Linux Kernel 2.6.17 rc2
  • Linux Kernel 2.6.17 rc6
  • Linux Kernel 2.6.19 rc1
  • Linux Kernel 2.6.19 rc2
  • Linux Kernel 2.6.19
  • Linux Kernel 2.6.19 rc4
  • Linux Kernel 2.6.19 rc3
  • Linux Kernel 2.6.19.1
  • Linux Kernel 2.6.19.2
  • Linux Kernel 2.6.19.3
  • Linux Kernel 2.6.2 rc3
  • Linux Kernel 2.6.2 rc2
  • Linux Kernel 2.6.2 rc1
  • Linux Kernel 2.6.21 git7
  • Linux Kernel 2.6.21 git6
  • Linux Kernel 2.6.21 git5
  • Linux Kernel 2.6.21 git4
  • Linux Kernel 2.6.21 git3
  • Linux Kernel 2.6.21 git2
  • Linux Kernel 2.6.21 git1
  • Linux Kernel 2.6.3 rc2
  • Linux Kernel 2.6.3 rc3
  • Linux Kernel 2.6.3 rc4
  • Linux Kernel 2.6.3 rc1
  • Linux Kernel 2.6.3
  • Linux Kernel 2.6.4 rc3
  • Linux Kernel 2.6.4 rc1
  • Linux Kernel 2.6.4 rc2
  • Linux Kernel 2.6.4
  • Linux Kernel 2.6.5 rc1
  • Linux Kernel 2.6.5 rc2
  • Linux Kernel 2.6.5 rc3
  • Linux Kernel 2.6.5
  • Linux Kernel 2.6.6 rc1
  • Linux Kernel 2.6.6 rc2
  • Linux Kernel 2.6.6 rc3
  • Linux Kernel 2.6.6
  • Linux Kernel 2.6.7 rc1
  • Linux Kernel 2.6.7 rc3
  • Linux Kernel 2.6.7 rc2
  • Linux Kernel 2.6.7
  • 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 2.6.8.1.5
  • Linux Kernel 2.6.9 final
  • Linux Kernel 2.6.9 rc4
  • Linux Kernel 2.6.9 rc3
  • Linux Kernel 2.6.9 rc2
  • Linux Kernel 2.6.9 rc1
  • 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 2.6.14.5
  • Linux Linux Kernel 2.6.14.6
  • Linux Linux Kernel 2.6.14.7
  • Linux Linux Kernel 2.6.15
  • Linux Linux Kernel 2.6.15.1
  • Linux Linux Kernel 2.6.15.2
  • Linux Linux Kernel 2.6.15.3
  • Linux Linux Kernel 2.6.15.4
  • Linux Linux Kernel 2.6.15.5
  • Linux Linux Kernel 2.6.15.6
  • Linux Linux Kernel 2.6.15.7
  • Linux Linux Kernel 2.6.16 rc1
  • Linux Linux Kernel 2.6.16 rc2
  • Linux Linux Kernel 2.6.16
  • Linux Linux Kernel 2.6.16 rc6
  • Linux Linux Kernel 2.6.16 rc4
  • Linux Linux Kernel 2.6.16 rc5
  • Linux Linux Kernel 2.6.16 rc3
  • Linux Linux Kernel 2.6.16.1
  • Linux Linux Kernel 2.6.16.10
  • Linux Linux Kernel 2.6.16.11
  • Linux Linux Kernel 2.6.16.12
  • Linux Linux Kernel 2.6.16.13
  • Linux Linux Kernel 2.6.16.14
  • Linux Linux Kernel 2.6.16.15
  • Linux Linux Kernel 2.6.16.16
  • Linux Linux Kernel 2.6.16.17
  • Linux Linux Kernel 2.6.16.18
  • Linux Linux Kernel 2.6.16.19
  • Linux Linux Kernel 2.6.16.2
  • Linux Linux Kernel 2.6.16.20
  • Linux Linux Kernel 2.6.16.21
  • Linux Linux Kernel 2.6.16.22
  • Linux Linux Kernel 2.6.16.23
  • Linux Linux Kernel 2.6.16.24
  • Linux Linux Kernel 2.6.16.25
  • Linux Linux Kernel 2.6.16.26
  • Linux Linux Kernel 2.6.16.27
  • Linux Linux Kernel 2.6.16.28
  • Linux Linux Kernel 2.6.16.29
  • Linux Linux Kernel 2.6.16.3
  • Linux Linux Kernel 2.6.16.30
  • Linux Linux Kernel 2.6.16.31
  • Linux Linux Kernel 2.6.16.32
  • Linux Linux Kernel 2.6.16.33
  • Linux Linux Kernel 2.6.16.34
  • Linux Linux Kernel 2.6.16.35
  • Linux Linux Kernel 2.6.16.36
  • Linux Linux Kernel 2.6.16.37
  • Linux Linux Kernel 2.6.16.38
  • Linux Linux Kernel 2.6.16.39
  • Linux Linux Kernel 2.6.16.4
  • Linux Linux Kernel 2.6.16.40
  • Linux Linux Kernel 2.6.16.41
  • Linux Linux Kernel 2.6.16.5
  • Linux Linux Kernel 2.6.16.6
  • Linux Linux Kernel 2.6.16.7
  • Linux Linux Kernel 2.6.16.8
  • Linux Linux Kernel 2.6.16.9
  • Linux Linux Kernel 2.6.17
  • Linux Linux Kernel 2.6.17.1
  • Linux Linux Kernel 2.6.17.10
  • Linux Linux Kernel 2.6.17.11
  • Linux Linux Kernel 2.6.17.12
  • Linux Linux Kernel 2.6.17.13
  • Linux Linux Kernel 2.6.17.14
  • Linux Linux Kernel 2.6.17.2
  • Linux Linux Kernel 2.6.17.3
  • Linux Linux Kernel 2.6.17.4
  • Linux Linux Kernel 2.6.17.5
  • Linux Linux Kernel 2.6.17.6
  • Linux Linux Kernel 2.6.17.7
  • Linux Linux Kernel 2.6.17.8
  • Linux Linux Kernel 2.6.17.9
  • Linux Linux Kernel 2.6.18 rc1
  • Linux Linux Kernel 2.6.18 rc2
  • Linux Linux Kernel 2.6.18 rc5
  • Linux Linux Kernel 2.6.18
  • Linux Linux Kernel 2.6.18 rc7
  • Linux Linux Kernel 2.6.18 rc6
  • Linux Linux Kernel 2.6.18 rc3
  • Linux Linux Kernel 2.6.18 rc4
  • Linux Linux Kernel 2.6.18.1
  • Linux Linux Kernel 2.6.18.2
  • Linux Linux Kernel 2.6.18.3
  • Linux Linux Kernel 2.6.18.4
  • Linux Linux Kernel 2.6.18.5
  • Linux Linux Kernel 2.6.18.6
  • Linux Linux Kernel 2.6.2
  • Linux Linux Kernel 2.6.20
  • Linux Linux Kernel 2.6.20.1
  • Linux Linux Kernel 2.6.20.10
  • Linux Linux Kernel 2.6.20.11
  • Linux Linux Kernel 2.6.20.12
  • Linux Linux Kernel 2.6.20.13
  • Linux Linux Kernel 2.6.20.14
  • Linux Linux Kernel 2.6.20.2
  • Linux Linux Kernel 2.6.20.3
  • Linux Linux Kernel 2.6.20.4
  • Linux Linux Kernel 2.6.20.5
  • Linux Linux Kernel 2.6.20.6
  • Linux Linux Kernel 2.6.20.7
  • Linux Linux Kernel 2.6.20.8
  • Linux Linux Kernel 2.6.20.9
  • Linux Linux Kernel 2.6.21
  • Linux Linux Kernel 2.6.21.1
  • Linux Linux Kernel 2.6.21.2
  • Linux Linux Kernel 2.6.21.3
  • MandrakeSoft Mandrake Linux 2007
  • MandrakeSoft Mandrake Linux 2007 X86_64
  • MandrakeSoft Mandrake Linux 2007.1
  • MandrakeSoft Mandrake Linux 2007.1 X86_64
  • MandrakeSoft Mandrake Linux 2008.0 X86_64
  • MandrakeSoft Mandrake Linux Corporate Server 3.0
  • MandrakeSoft Mandrake Linux Corporate Server 3.0 X86_64
  • MandrakeSoft Mandrake Linux Corporate Server 4.0 X86_64
  • MandrakeSoft Mandrake Linux Corporate Server 4.0
  • MandrakeSoft Mandrake Multi Network Firewall 2.0
  • Novell Linux Desktop 9
  • Novell Linux POS 9
  • Novell Open Enterprise Server
  • Novell Open Enterprise Server
  • Novell OpenSUSE 10.2
  • Novell SLE SDK 10
  • Novell SLE SDK 10 SP1
  • Novell SUSE Linux Enterprise Desktop 10 SP1
  • Novell SUSE Linux Enterprise Server 10
  • Novell SUSE Linux Enterprise Server 10 SP1
  • OpenPKG OpenPKG CURRENT
  • OpenPKG OpenPKG Enterprise E1.0-SOLID
  • RedHat Enterprise Linux 5
  • RedHat Enterprise Linux 5 Client
  • RedHat Enterprise Linux 5 Client Workstation
  • RedHat Enterprise Linux Desktop 5.0
  • SUSE SuSE Linux 10.0
  • SUSE SuSE Linux 10.1
  • SuSE SuSE SLES 9

Reported:

Jun 07, 2007

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