Linux kernel madvise_remove security bypass

linux-madvise-security-bypass (25870) The risk level is classified as MediumMedium Risk

Description:

Linux kernel could allow a local attacker to bypass security restrictions, caused by improper validation of shared memory mm/madvise.c file. An attacker could exploit this vulnerability using the madvise_remove command to gain write access to read-only attachments and shared memory.

Platforms Affected:

  • Debian, Debian Linux 3.1
  • Linux, Kernel 2.4.0 test5
  • Linux, Kernel 2.4.0 test4
  • Linux, Kernel 2.4.0 test9
  • Linux, Kernel 2.4.0 test8
  • Linux, Kernel 2.4.0 test7
  • Linux, Kernel 2.4.0 test6
  • Linux, Kernel 2.4.0
  • Linux, Kernel 2.4.0 test1
  • Linux, Kernel 2.4.0 test10
  • Linux, Kernel 2.4.0 test11
  • Linux, Kernel 2.4.0 test3
  • Linux, Kernel 2.4.0 test2
  • Linux, Kernel 2.4.0 test12
  • Linux, Kernel 2.4.1
  • Linux, Kernel 2.4.10
  • Linux, Kernel 2.4.11
  • Linux, Kernel 2.4.12
  • Linux, Kernel 2.4.13
  • Linux, Kernel 2.4.14
  • Linux, Kernel 2.4.15
  • Linux, Kernel 2.4.16
  • Linux, Kernel 2.4.17
  • Linux, Kernel 2.4.18 pre7
  • Linux, Kernel 2.4.18 pre6
  • Linux, Kernel 2.4.18 pre5
  • Linux, Kernel 2.4.18
  • Linux, Kernel 2.4.18 x86
  • Linux, Kernel 2.4.18 pre4
  • Linux, Kernel 2.4.18 pre3
  • Linux, Kernel 2.4.18 pre2
  • Linux, Kernel 2.4.18 pre1
  • Linux, Kernel 2.4.18 pre8
  • Linux, Kernel 2.4.19
  • Linux, Kernel 2.4.19 pre1
  • Linux, Kernel 2.4.19 pre2
  • Linux, Kernel 2.4.19 pre3
  • Linux, Kernel 2.4.19 pre4
  • Linux, Kernel 2.4.19 pre5
  • Linux, Kernel 2.4.19 pre6
  • Linux, Kernel 2.4.2
  • Linux, Kernel 2.4.20
  • Linux, Kernel 2.4.21
  • Linux, Kernel 2.4.21 pre1
  • Linux, Kernel 2.4.21 pre4
  • Linux, Kernel 2.4.21 pre7
  • Linux, Kernel 2.4.22
  • Linux, Kernel 2.4.23
  • Linux, Kernel 2.4.23 pre9
  • Linux, Kernel 2.4.23 ow2
  • Linux, Kernel 2.4.24 ow1
  • Linux, Kernel 2.4.24
  • Linux, Kernel 2.4.25
  • Linux, Kernel 2.4.26
  • Linux, Kernel 2.4.27 pre2
  • Linux, Kernel 2.4.27 pre1
  • Linux, Kernel 2.4.27 pre3
  • Linux, Kernel 2.4.27
  • Linux, Kernel 2.4.27 pre5
  • Linux, Kernel 2.4.27 pre4
  • Linux, Kernel 2.4.28
  • Linux, Kernel 2.4.29 rc1
  • Linux, Kernel 2.4.29
  • Linux, Kernel 2.4.29 rc2
  • Linux, Kernel 2.4.3
  • Linux, Kernel 2.4.30
  • Linux, Kernel 2.4.30 rc2
  • Linux, Kernel 2.4.30 rc3
  • Linux, Kernel 2.4.31
  • Linux, Kernel 2.4.31 pre1
  • Linux, Kernel 2.4.32
  • Linux, Kernel 2.4.32 pre2
  • Linux, Kernel 2.4.32 pre1
  • Linux, Kernel 2.4.33 pre1
  • Linux, Kernel 2.4.4
  • Linux, Kernel 2.4.5
  • Linux, Kernel 2.4.6
  • Linux, Kernel 2.4.7
  • Linux, Kernel 2.4.8
  • Linux, Kernel 2.4.9
  • Linux, Kernel 2.5.0
  • Linux, Kernel 2.5.1
  • Linux, Kernel 2.5.10
  • Linux, Kernel 2.5.11
  • Linux, Kernel 2.5.12
  • Linux, Kernel 2.5.13
  • Linux, Kernel 2.5.14
  • Linux, Kernel 2.5.15
  • Linux, Kernel 2.5.16
  • Linux, Kernel 2.5.17
  • Linux, Kernel 2.5.18
  • Linux, Kernel 2.5.19
  • Linux, Kernel 2.5.2
  • Linux, Kernel 2.5.20
  • Linux, Kernel 2.5.21
  • Linux, Kernel 2.5.22
  • Linux, Kernel 2.5.23
  • Linux, Kernel 2.5.24
  • Linux, Kernel 2.5.25
  • Linux, Kernel 2.5.26
  • Linux, Kernel 2.5.27
  • Linux, Kernel 2.5.28
  • Linux, Kernel 2.5.29
  • Linux, Kernel 2.5.3
  • Linux, Kernel 2.5.30
  • Linux, Kernel 2.5.31
  • Linux, Kernel 2.5.32
  • Linux, Kernel 2.5.33
  • Linux, Kernel 2.5.34
  • Linux, Kernel 2.5.35
  • Linux, Kernel 2.5.36
  • Linux, Kernel 2.5.37
  • Linux, Kernel 2.5.38
  • Linux, Kernel 2.5.39
  • Linux, Kernel 2.5.4
  • Linux, Kernel 2.5.40
  • Linux, Kernel 2.5.41
  • Linux, Kernel 2.5.42
  • Linux, Kernel 2.5.43
  • Linux, Kernel 2.5.44
  • Linux, Kernel 2.5.45
  • Linux, Kernel 2.5.46
  • Linux, Kernel 2.5.47
  • Linux, Kernel 2.5.48
  • Linux, Kernel 2.5.49
  • Linux, Kernel 2.5.5
  • Linux, Kernel 2.5.50
  • Linux, Kernel 2.5.51
  • Linux, Kernel 2.5.52
  • Linux, Kernel 2.5.53
  • Linux, Kernel 2.5.54
  • Linux, Kernel 2.5.55
  • Linux, Kernel 2.5.56
  • Linux, Kernel 2.5.57
  • Linux, Kernel 2.5.58
  • Linux, Kernel 2.5.59
  • Linux, Kernel 2.5.6
  • Linux, Kernel 2.5.60
  • Linux, Kernel 2.5.61
  • Linux, Kernel 2.5.62
  • Linux, Kernel 2.5.63
  • Linux, Kernel 2.5.64
  • Linux, Kernel 2.5.65
  • Linux, Kernel 2.5.66
  • Linux, Kernel 2.5.67
  • Linux, Kernel 2.5.68
  • Linux, Kernel 2.5.69
  • Linux, Kernel 2.5.7
  • Linux, Kernel 2.5.8
  • Linux, Kernel 2.5.9
  • Linux, Kernel 2.6.0 test9-cvs
  • Linux, Kernel 2.6.0
  • Linux, Kernel 2.6.0 test1
  • Linux, Kernel 2.6.0 test10
  • Linux, Kernel 2.6.0 test11
  • Linux, Kernel 2.6.0 test2
  • Linux, Kernel 2.6.0 test3
  • Linux, Kernel 2.6.0 test4
  • Linux, Kernel 2.6.0 test5
  • Linux, Kernel 2.6.0 test6
  • Linux, Kernel 2.6.0 test7
  • Linux, Kernel 2.6.0 test8
  • Linux, Kernel 2.6.0 test9
  • Linux, Kernel 2.6.1 rc2
  • Linux, Kernel 2.6.1 rc1
  • Linux, Kernel 2.6.1
  • Linux, Kernel 2.6.10
  • Linux, Kernel 2.6.10 rc2
  • Linux, Kernel 2.6.11 rc4
  • Linux, Kernel 2.6.11 rc3
  • Linux, Kernel 2.6.11 rc2
  • Linux, Kernel 2.6.11
  • Linux, Kernel 2.6.11.11
  • Linux, Kernel 2.6.11.12
  • 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 2.6.12 rc1
  • Linux, Kernel 2.6.12 rc5
  • Linux, Kernel 2.6.12 rc4
  • 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 2.6.12.5
  • Linux, Kernel 2.6.12.6
  • Linux, Kernel 2.6.13 rc7
  • Linux, Kernel 2.6.13 rc6
  • Linux, Kernel 2.6.13
  • Linux, Kernel 2.6.13 rc4
  • 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 2.6.14 rc3
  • Linux, Kernel 2.6.14 rc1
  • Linux, Kernel 2.6.14
  • Linux, Kernel 2.6.14 rc4
  • 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 2.6.15 rc2
  • Linux, Kernel 2.6.15 rc3
  • Linux, Kernel 2.6.15 rc1
  • Linux, Kernel 2.6.15
  • Linux, Kernel 2.6.15.1
  • 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 2.6.16 rc1
  • Linux, Kernel 2.6.16
  • Linux, Kernel 2.6.16.1
  • Linux, Kernel 2.6.2
  • Linux, Kernel 2.6.3
  • Linux, Kernel 2.6.4
  • Linux, Kernel 2.6.5
  • Linux, Kernel 2.6.6
  • Linux, Kernel 2.6.6 rc1
  • Linux, Kernel 2.6.7
  • Linux, Kernel 2.6.7 rc1
  • Linux, Kernel 2.6.8 rc3
  • Linux, Kernel 2.6.8
  • Linux, Kernel 2.6.8 rc1
  • Linux, Kernel 2.6.8 rc2
  • Linux, Kernel 2.6.9
  • 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 Linux Desktop 1.0
  • SuSE, SuSE SLES 9

Remedy:

Upgrade to the latest stable version of Linux kernel (2.6.16.9 or later), available from The Linux Kernel Archives. See References.

For Debian GNU/Linux:
Refer to DSA-1097-1 and 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.

Consequences:

Bypass Security

References:

  • The Linux Kernel Archives Web site, ChangeLog-2.6.16.7 at http://kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.16.7.
  • The Linux Kernel Archives Web site, ChangeLog-2.6.16.6 at http://kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.16.6.
  • The The Linux Kernel Archives Web site, The Linux Kernel Archives at http://www.kernel.org/.
  • BID-17587: Linux Kernel Shared Memory Security Restriction Bypass Vulnerabilities
  • CVE-2006-1524: madvise_remove in Linux kernel 2.6.16 up to 2.6.16.6 does not follow file and mmap restrictions, which allows local users to bypass IPC permissions and replace portions of readonly tmpfs files with zeroes, aka the MADV_REMOVE vulnerability. NOTE: this description was originally written in a way that combined two separate issues. The mprotect issue now has a separate name, CVE-2006-2071.
  • DSA-1097: kernel-source-2.4.27 -- several vulnerabilities
  • DSA-1103: kernel-source-2.6.8 -- several vulnerabilities
  • OSVDB ID: 24714: Linux Kernel madvise_remove IPC Permission Bypass
  • SA19657: Linux Kernel Shared Memory Restrictions Bypass
  • SA19664: Linux Kernel Shared Memory Restrictions Bypass
  • SUSE-SA:2006:028: various kernel security problems
  • VUPEN/ADV-2006-1391: Linux Kernel Memory Mapping Potection Local Security Bypass Vulnerability

Reported:

Apr 18, 2006

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For corrections or additions please email xforce@iss.net

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