Linux kernel copy_from_User information disclosure

kernel-copyfromuser-information-disclosure (29378) The risk level is classified as MediumMedium Risk

Description:

Linux kernel could allow a local attacker to obtain sensitive information, caused by improper clearing of kernel memory after receiving a fault by the copy_from_User function. By appending to a file from an invalid address, a local attacker could read kernel memory.

*CVSS:

Base Score: 2.5
  Access Vector: Local
  Access Complexity: Low
  Authentication: Not Required
  Confidentiality Impact: Partial
  Integrity Impact: None
  Availability Impact: None
 
Temporal Score: 1.8
  Exploitability: Unproven
  Remediation Level: Official-Fix
  Report Confidence: Confirmed

Consequences:

Obtain Information

Remedy:

Upgrade to the latest version of Linux Kernel (version 2.6.19-rc1 or later), available from the Linux Kernel Web site. See References.

For Red Hat Linux 3:
Refer to RHSA-2006:0710-7 for patch, upgrade, or suggested workaround information. See References.

For Red Hat Linux (kernel):
Refer to RHSA-2007:0014 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-2.6.19-rc1.
  • The Linux Kernel Archives Web site: The Linux Kernel Archives.
  • ASA-2006-254: kernel security update (RHSA-2006-0710)
  • ASA-2007-063: kernel security update (RHSA-2007-0014)
  • BID-20379: Linux Kernel S/390 Copy_From_User Local Information Disclosure Vulnerability
  • CVE-2006-5174: The copy_from_user function in the uaccess code in Linux kernel 2.6 before 2.6.19-rc1, when running on s390, does not properly clear a kernel buffer, which allows local user space programs to read portions of kernel memory by appending to a file from a bad address
  • DSA-1233: kernel-source-2.6.8 -- several vulnerabilities
  • DSA-1237: kernel-source-2.4.27 -- several vulnerabilities
  • RHSA-2006-0710: kernel security update
  • RHSA-2007-0014: Important: kernel security update
  • SA22289: Linux Kernel s390 "copy_from_user" Information Disclosure
  • SA23064: Avaya Products Linux Kernel Multiple Vulnerabilities
  • SA24206: Avaya Products Kernel Multiple Vulnerabilities
  • SECTRACK ID: 1017090: Linux Kernel `uaccess` S/390 Code Discloses Kernel Memory to Local Users
  • SUSE-SA:2006:079: Linux kernel security problems
  • VUPEN/ADV-2006-3938: Linux Kernel s390 copy_from_user Local Information Disclosure Vulnerability

Platforms Affected:

  • Debian Debian Linux 3.1
  • 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 rc1
  • Linux Kernel 2.6.10 rc2
  • Linux Kernel 2.6.10 rc3
  • Linux Kernel 2.6.10
  • Linux Kernel 2.6.11
  • Linux Kernel 2.6.11 rc2
  • Linux Kernel 2.6.11 rc3
  • Linux Kernel 2.6.11 rc4
  • Linux Kernel 2.6.11 rc1
  • Linux Kernel 2.6.11 rc5
  • 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 rc3
  • Linux Kernel 2.6.12 rc2
  • Linux Kernel 2.6.12 rc4
  • Linux Kernel 2.6.12 rc5
  • Linux Kernel 2.6.12 rc6
  • Linux Kernel 2.6.12 rc1
  • 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 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 rc7
  • 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 rc2
  • Linux Kernel 2.6.14
  • Linux Kernel 2.6.14 rc3
  • Linux Kernel 2.6.14 rc1
  • 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 rc1
  • Linux Kernel 2.6.15
  • Linux Kernel 2.6.15 rc2
  • Linux Kernel 2.6.15 rc7
  • Linux Kernel 2.6.15 rc3
  • Linux Kernel 2.6.15 rc4
  • Linux Kernel 2.6.15 rc6
  • Linux Kernel 2.6.15 rc5
  • 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
  • Linux Kernel 2.6.16 rc7
  • Linux Kernel 2.6.16 rc3
  • Linux Kernel 2.6.16 rc4
  • Linux Kernel 2.6.16 rc5
  • Linux Kernel 2.6.16 rc6
  • Linux Kernel 2.6.16.1
  • Linux Kernel 2.6.16.10
  • Linux Kernel 2.6.16.11
  • Linux Kernel 2.6.16.12
  • Linux Kernel 2.6.16.13
  • Linux Kernel 2.6.16.14
  • Linux Kernel 2.6.16.15
  • Linux Kernel 2.6.16.16
  • Linux Kernel 2.6.16.17
  • Linux Kernel 2.6.16.18
  • Linux Kernel 2.6.16.19
  • Linux Kernel 2.6.16.2
  • Linux Kernel 2.6.16.20
  • Linux Kernel 2.6.16.21
  • Linux Kernel 2.6.16.22
  • Linux Kernel 2.6.16.23
  • Linux Kernel 2.6.16.24
  • Linux Kernel 2.6.16.25
  • Linux Kernel 2.6.16.26
  • Linux Kernel 2.6.16.27
  • Linux Kernel 2.6.16.28
  • Linux Kernel 2.6.16.29
  • Linux Kernel 2.6.16.3
  • Linux Kernel 2.6.16.30
  • Linux Kernel 2.6.16.31
  • Linux Kernel 2.6.16.32
  • Linux Kernel 2.6.16.33
  • Linux Kernel 2.6.16.34
  • Linux Kernel 2.6.16.35
  • Linux Kernel 2.6.16.36
  • Linux Kernel 2.6.16.37
  • Linux Kernel 2.6.16.38
  • Linux Kernel 2.6.16.39
  • Linux Kernel 2.6.16.4
  • Linux Kernel 2.6.16.40
  • Linux Kernel 2.6.16.41
  • Linux Kernel 2.6.16.43
  • Linux Kernel 2.6.16.44
  • Linux Kernel 2.6.16.45
  • Linux Kernel 2.6.16.46
  • Linux Kernel 2.6.16.47
  • Linux Kernel 2.6.16.48
  • Linux Kernel 2.6.16.49
  • Linux Kernel 2.6.16.5
  • Linux Kernel 2.6.16.50
  • Linux Kernel 2.6.16.51
  • Linux Kernel 2.6.16.52
  • Linux Kernel 2.6.16.53
  • Linux Kernel 2.6.16.6
  • Linux Kernel 2.6.16.7
  • Linux Kernel 2.6.16.8
  • Linux Kernel 2.6.16.9
  • Linux Kernel 2.6.17 rc3
  • Linux Kernel 2.6.17
  • Linux Kernel 2.6.17 rc1
  • Linux Kernel 2.6.17 rc6
  • Linux Kernel 2.6.17 rc5
  • Linux Kernel 2.6.17 rc4
  • Linux Kernel 2.6.17 rc2
  • Linux Kernel 2.6.17.1
  • Linux Kernel 2.6.17.10
  • Linux Kernel 2.6.17.11
  • Linux Kernel 2.6.17.12
  • Linux Kernel 2.6.17.13
  • Linux Kernel 2.6.17.14
  • Linux Kernel 2.6.17.2
  • Linux Kernel 2.6.17.3
  • Linux Kernel 2.6.17.4
  • Linux Kernel 2.6.17.5
  • Linux Kernel 2.6.17.6
  • Linux Kernel 2.6.17.7
  • Linux Kernel 2.6.17.8
  • Linux Kernel 2.6.17.9
  • Linux Kernel 2.6.18 rc5
  • Linux Kernel 2.6.18 rc2
  • Linux Kernel 2.6.18 rc1
  • Linux Kernel 2.6.18 rc3
  • Linux Kernel 2.6.18 rc4
  • Linux Kernel 2.6.18 rc6
  • Linux Kernel 2.6.18 rc7
  • Linux Kernel 2.6.18
  • Linux Kernel 2.6.18.1
  • Linux Kernel 2.6.18.10
  • Linux Kernel 2.6.18.11
  • Linux Kernel 2.6.18.12
  • Linux Kernel 2.6.18.13
  • Linux Kernel 2.6.18.14
  • Linux Kernel 2.6.18.15
  • Linux Kernel 2.6.18.16
  • Linux Kernel 2.6.18.17
  • Linux Kernel 2.6.18.18
  • Linux Kernel 2.6.18.19
  • Linux Kernel 2.6.18.2
  • Linux Kernel 2.6.18.20
  • Linux Kernel 2.6.18.21
  • Linux Kernel 2.6.18.22
  • Linux Kernel 2.6.18.23
  • Linux Kernel 2.6.18.24
  • Linux Kernel 2.6.18.25
  • Linux Kernel 2.6.18.26
  • Linux Kernel 2.6.18.27
  • Linux Kernel 2.6.18.28
  • Linux Kernel 2.6.18.29
  • Linux Kernel 2.6.18.3
  • Linux Kernel 2.6.18.30
  • Linux Kernel 2.6.18.31
  • Linux Kernel 2.6.18.32
  • Linux Kernel 2.6.18.33
  • Linux Kernel 2.6.18.34
  • Linux Kernel 2.6.18.35
  • Linux Kernel 2.6.18.36
  • Linux Kernel 2.6.18.37
  • Linux Kernel 2.6.18.38
  • Linux Kernel 2.6.18.39
  • Linux Kernel 2.6.18.4
  • Linux Kernel 2.6.18.40
  • Linux Kernel 2.6.18.41
  • Linux Kernel 2.6.18.42
  • Linux Kernel 2.6.18.43
  • Linux Kernel 2.6.18.44
  • Linux Kernel 2.6.18.45
  • Linux Kernel 2.6.18.46
  • Linux Kernel 2.6.18.47
  • Linux Kernel 2.6.18.48
  • Linux Kernel 2.6.18.49
  • Linux Kernel 2.6.18.5
  • Linux Kernel 2.6.18.50
  • Linux Kernel 2.6.18.51
  • Linux Kernel 2.6.18.52
  • Linux Kernel 2.6.18.53
  • Linux Kernel 2.6.18.6
  • Linux Kernel 2.6.18.7
  • Linux Kernel 2.6.18.8
  • Linux Kernel 2.6.18.9
  • Linux Kernel 2.6.2 rc3
  • Linux Kernel 2.6.2 rc2
  • Linux Kernel 2.6.2 rc1
  • Linux Kernel 2.6.2
  • 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 rc2
  • Linux Kernel 2.6.4 rc1
  • Linux Kernel 2.6.5 rc1
  • Linux Kernel 2.6.5
  • Linux Kernel 2.6.5 rc3
  • Linux Kernel 2.6.5 rc2
  • Linux Kernel 2.6.6 rc3
  • Linux Kernel 2.6.6 rc2
  • Linux Kernel 2.6.6
  • Linux Kernel 2.6.6 rc1
  • 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
  • Linux Kernel 2.6.9 rc4
  • Linux Kernel 2.6.9 rc3
  • Linux Kernel 2.6.9 rc2
  • Linux Kernel 2.6.9 rc1
  • Novell Linux Desktop 9
  • Novell Linux POS 9
  • Novell Open Enterprise Server
  • Novell Open Enterprise Server
  • RedHat Enterprise Linux 3 Desktop
  • RedHat Enterprise Linux 3 WS
  • RedHat Enterprise Linux 3 ES
  • RedHat Enterprise Linux 3 AS
  • RedHat Enterprise Linux 4 Desktop
  • RedHat Enterprise Linux 4 WS
  • RedHat Enterprise Linux 4 ES
  • RedHat Enterprise Linux 4 AS
  • SuSE Linux Enterprise Server 9
  • SuSE SuSE SLED 10
  • SuSE SuSE SLES 10
  • SuSE SuSE SLES 9

Reported:

Oct 04, 2006

The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall the author/distributor (IBM Internet Security Systems X-Force) be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.

For corrections or additions please email xforce@iss.net

Return to the main page

* According to the Forum of Incident Response and Security Teams (FIRST), the Common Vulnerability Scoring System (CVSS) is an "industry open standard designed to convey vulnerability severity and help to determine urgency and priority of response." IBM PROVIDES THE CVSS SCORES "AS IS" WITHOUT WARRANTY OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY.
The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.

About IBM Internet Security Systems

IBM Internet Security Systems is a trusted security advisor to thousands of the world's leading businesses and governments, helping to provide pre-emptive protection for networks, desktops and servers. The IBM Proventia? integrated security platform is designed to automatically protect against both known and unknown threats, helping to keep networks up and running and shield customers from online attacks before they impact business assets. IBM Internet Security Systems products and services are based on the proactive security intelligence of its X-Force? research and development team ? an unequivocal world authority in vulnerability and threat research. The IBM Internet Security Systems product line is also complemented by comprehensive Managed Security Services and Professional Security Services. For more information, visit the IBM Internet Security Systems Web site at www.iss.net or call 800-776-2362.