Linux kernel do_mremap allows elevated privileges

linux-mremap-gain-privileges (15244)

High Risk

Description:

Linux kernel could allow a local attacker to gain elevated privileges on the system, caused by a vulnerability in the memory management code. The do_mremap function allows for the remapping, resizing, and moving of a virtual memory area (VMA). The do_mremap function fails to properly check the value returned by the do_munmap function. A local attacker could exploit this vulnerability to execute arbitrary code on the vulnerable system with elevated privileges.

Platforms Affected:

• Conectiva, Linux 8.0
• Conectiva, Linux 9.0
• Debian, Debian Linux 3.0
• Gentoo, Linux
• Immunix, Immunix OS 7+-beta
• Linux, Kernel 2.2.0
• Linux, Kernel 2.2.1
• Linux, Kernel 2.2.10
• Linux, Kernel 2.2.11
• Linux, Kernel 2.2.12
• Linux, Kernel 2.2.13
• Linux, Kernel 2.2.14
• Linux, Kernel 2.2.15 pre20
• Linux, Kernel 2.2.15 pre16
• Linux, Kernel 2.2.15
• Linux, Kernel 2.2.16 pre6
• Linux, Kernel 2.2.16
• Linux, Kernel 2.2.17
• Linux, Kernel 2.2.18
• Linux, Kernel 2.2.19
• Linux, Kernel 2.2.2
• Linux, Kernel 2.2.20
• Linux, Kernel 2.2.21
• Linux, Kernel 2.2.22
• Linux, Kernel 2.2.23
• Linux, Kernel 2.2.24
• Linux, Kernel 2.2.3
• Linux, Kernel 2.2.7
• Linux, Kernel 2.2.8
• Linux, Kernel 2.2.9
• Linux, Kernel 2.4.0 test1
• Linux, Kernel 2.4.0 test8
• Linux, Kernel 2.4.0 test7
• Linux, Kernel 2.4.0 test6
• Linux, Kernel 2.4.0 test5
• Linux, Kernel 2.4.0 test4
• Linux, Kernel 2.4.0 test3
• Linux, Kernel 2.4.0 test2
• Linux, Kernel 2.4.0 test12
• Linux, Kernel 2.4.0
• Linux, Kernel 2.4.0 test9
• Linux, Kernel 2.4.0 test10
• Linux, Kernel 2.4.0 test11
• 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
• Linux, Kernel 2.4.18 x86
• Linux, Kernel 2.4.18 pre8
• Linux, Kernel 2.4.18 pre7
• Linux, Kernel 2.4.18 pre6
• Linux, Kernel 2.4.18 pre5
• 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 2.4.19 pre3
• Linux, Kernel 2.4.19 pre4
• Linux, Kernel 2.4.19 pre2
• Linux, Kernel 2.4.19 pre1
• Linux, Kernel 2.4.19
• Linux, Kernel 2.4.19 pre6
• Linux, Kernel 2.4.19 pre5
• Linux, Kernel 2.4.2
• Linux, Kernel 2.4.20
• Linux, Kernel 2.4.21 pre4
• Linux, Kernel 2.4.21 pre1
• Linux, Kernel 2.4.21
• Linux, Kernel 2.4.21 pre7
• Linux, Kernel 2.4.22
• Linux, Kernel 2.4.23 pre9
• Linux, Kernel 2.4.23
• Linux, Kernel 2.4.24
• Linux, Kernel 2.4.3
• 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 2.6.0
• 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 2.6.1 rc2
• Linux, Kernel 2.6.1 rc1
• Linux, Kernel 2.6.2
• Linux, Kernel 2.6.4
• Linux, Kernel 2.6.5
• Linux, Kernel 2.6.6
• MandrakeSoft, Mandrake Linux 9.0
• MandrakeSoft, Mandrake Linux 9.1 PPC
• MandrakeSoft, Mandrake Linux 9.1
• MandrakeSoft, Mandrake Linux 9.2
• MandrakeSoft, Mandrake Linux 9.2 AMD64
• MandrakeSoft, Mandrake Linux Corporate Server 2.1
• MandrakeSoft, Mandrake Linux Corporate Server 2.1 X86_64
• MandrakeSoft, Mandrake Multi Network Firewall 8.2
• RedHat, bigmem kernel 2.4.20-8 i686
• RedHat, Enterprise Linux 2.1 AW
• RedHat, Enterprise Linux 2.1 WS
• RedHat, Enterprise Linux 2.1 ES
• RedHat, Enterprise Linux 2.1 AS
• RedHat, Enterprise Linux 3 WS
• RedHat, Enterprise Linux 3 ES
• RedHat, Enterprise Linux 3 AS
• RedHat, kernel 2.4.20-8 Athlon SMP
• RedHat, kernel 2.4.20-8 i686 SMP
• RedHat, kernel boot 2.4.20-8 i386
• RedHat, kernel doc 2.4.20-8 i386
• RedHat, Linux 9.0
• RedHat, Linux Advanced Workstation 2.1 Itanium
• Slackware, Slackware Linux 9.1
• Slackware, Slackware Linux current
• SuSE, SuSE eMail Server 3.1
• SuSE, SuSE eMail Server III
• SuSE, SuSE Linux 8.0
• SuSE, SuSE Linux 8.1
• SuSE, SuSE Linux 8.2
• SuSE, SuSE Linux 9.0
• SuSE, SuSE Linux Connectivity Server
• SuSE, SuSE Linux Database Server
• SuSE, SuSE Linux Enterprise Server 7.0
• SuSE, SuSE Linux Enterprise Server 8.0
• SuSE, SuSE Linux Firewall
• SuSE, SuSE Linux Office Server
• Trustix, Secure Linux 1.5
• Turbolinux, Turbolinux 7 Server
• Turbolinux, Turbolinux 7 Workstation
• Turbolinux, Turbolinux 8 Server
• Turbolinux, Turbolinux 8 Workstation

Remedy:

For Linux Kernel 2.4.x:
Upgrade to the latest version of Linux kernel (2.4.25 or later), available from the Linux Kernel Web site. See References.

For Linux Kernel 2.6.x:
Upgrade to the latest version of Linux kernel (2.6.3 or later), available from the Linux Kernel Web site. See References.

For Red Hat Linux 9:
Upgrade to the latest kernel package (2.4.20-30.9 or later), as listed in RHSA-2004:065-04 for more information. See References.

For Red Hat Linux:
Upgrade to the latest kernel package, as listed below. Refer to RHSA-2004:069-06 for more information. See References.

Red Hat Enterprise Linux AS (v. 2.1), ES (v. 2.1), and WS (v. 2.1): 2.4.9-e.38 or later

For Red Hat Linux:
Upgrade to the latest kernel package, as listed below. Refer to RHSA-2004:106-10 for more information. See References.

Red Hat Enterprise Linux AS (v. 2.1) and Advanced Workstation 2.1 for the Itanium Processor: 2.4.18-e.43 or later

For Debian GNU/Linux 3.0 (woody):
Upgrade to the latest kernel package, as listed below. Refer to DSA-438-1 for more information. See References.

kernel-source: 2.4.18 or later
kernel-image (Alpha): 2.4.18-1
kernel-image (Intel i386): 2.4.18-1-i386 or later
kernel-image (Intel i386bf): 2.4.18-i386bf
kernel-patch (PPC): 2.4.18 or later

For Debian GNU/Linux 3.0 (woody) containing the linux-kernel-2.4.17-s390 package:
Upgrade to the latest kernel package (0.0.20020816-0.woody.2 or later), as listed in DSA-442-1. See References.

For Debian GNU/Linux 3.0 (woody) containing the mips+mipsel-2.4.17 package:
Upgrade to the latest kernel package (2.4.17-0.020226.2.woody5 or later), as listed in DSA-441-1. See References.

For Debian GNU/Linux 3.0 (woody) containing the powerpc-apus-2.4.17 package:
Upgrade to the latest kernel package (2.4.17-4 or later), as listed in DSA-440-1. See References.

For Debian GNU/Linux 3.0 (woody) containing the arm-2.2.19 package:
Upgrade to the latest kernel package (2.2.19.1-4woody1 or later), as listed in DSA-456-1. See References.

For Debian GNU/Linux 3.0 (woody) containing the kernel-2.4.17 package:
Upgrade to the latest kernel package (2.4.17-ia64_011226.16 or later), as listed in DSA-444-1. See References.

For Debian GNU/Linux 3.0 (woody) containing the mips-2.4.17 package:
Upgrade to the latest kernel package (2.4.19-4.woody1 or later), as listed in DSA-450-1. See References.

For Debian GNU/Linux 3.0 (alias woody) containing the kernel-2.2.20 package:
Upgrade to the latest kernel package (2.2.20-5woody3 or later), as listed in DSA-453-1. See References.

For Debian GNU/Linux 3.0 (woody) containing the kernel-2.2.22 package:
Upgrade to the latest kernel package (2.2.22-1woody1 or later), as listed in DSA-454-1. See References.

For Debian GNU/Linux 3.0 (woody) containing the kernel-2.2.10 package:
Upgrade to the latest kernel package (2.2.10-13woody1 or later), as listed in DSA-466-1. See References.

For Debian GNU/Linux 3.0 (woody) containing the hppa package:
Upgrade to the latest kernel package, as listed below. Refer to DSA-475-1 for more information. See References. Debian GNU/Linux 3.0: 2.4.18-hppa or later

For SuSE Linux:
Upgrade to the latest kernel package, as listed below. Refer to SuSE Security Announcement SuSE-SA:2004:005 for more information. See References.

SuSE Linux 9.0 (Intel): 2.4.21-192 or later
SuSE Linux 8.2: 2.4.20-105 or later
SuSE Linux 8.1: 2.4.21-189 or later
SuSE Linux 9.0 (x86_64 Platform): 2.4.21-201 or later

For Slackware Linux:
Upgrade to the latest kernel package, as listed below. Refer to slackware-security Mailing List, Wed, 18 Feb 2004 04:37:55 -0800 (PST) for more information. See References.

Slackware Linux 9.1 and -current: 2.4.24-i486-2 or later

For Conectiva Linux:
Upgrade to the latest kernel package, as listed below. Refer to Conectiva Linux Security Announcement CLSA-2004:820 for more information. See References.

Conectiva Linux 8: 2.4.19-1U80_21cl or later
Conectiva Linux 9: 2.4.21-31301U90_15cl or later

For Turbolinux:
Upgrade to the latest kernel package (2.4.18-17 or later), as listed in Turbolinux Security Advisory TLSA-2004-7. See References.

For Trustix Secure Linux 1.5:
Upgrade to the latest kernel package (2.2.25-10tr or later), as listed in Trustix Secure Linux Security Advisory #2004-0008. See References.

For Mandrake Linux:
Upgrade to the latest kernel package, as listed below. Refer to MandrakeSoft Security Advisory MDKSA-2004:015 : kernel for more information. See References.

Mandrake Linux 9.0, Multi Network Firewall 8.2, and Corporate Server 2.1: 2.4.19.38mdk-1-1mdk or later
Mandrake Linux 9.1: 2.4.21.0.28mdk-1-1mdk or later
Mandrake Linux 9.2: 2.4.22.28mdk-1-1mdk or later

For Mandrake Linux:
Upgrade to the latest kernel package, as listed below. Refer to MandrakeSoft Security Advisory MDKSA-2004:015-1 : kernel for more information. See References.

Mandrake Linux Corporate Server 2.1: 2.4.19.38mdk-1-1mdk or later

For Immunix 7+:
Upgrade to the latest version of kernel (2.2.19-16_imnx_29 or later), as listed in Immunix Secured OS Security Advisory IMNX-2004-7+-001-01. See References.

For Gentoo Linux:
Upgrade to the appropriate package of kernel, as listed in GLSA 200403-02. See References.

For other distributions:
Contact your vendor for upgrade or patch information.

Consequences:

Gain Privileges

References:

• CIAC Information Bulletin O-082, Red Hat Updated Kernel Packages Resolve Security Vulnerabilities at http://www.ciac.org/ciac/bulletins/o-082.shtml.
• CIAC Information Bulletin O-094, Linux mremap(2) System Call Vulnerability at http://www.ciac.org/ciac/bulletins/o-094.shtml.
• CIAC Information Bulletin O-094, Linux mremap(2) System Call Vulnerability at http://www.ciac.org/ciac/bulletins/o-094.shtml.
• CIAC Information Bulletin O-126, Red Hat Updated Kernel Packages Fix Several Vulnerabilities at http://www.ciac.org/ciac/bulletins/o-126.shtml.
• Conectiva Linux Security Announcement CLSA-2004:820, kernel at http://distro.conectiva.com/atualizacoes/index.php?id=a&anuncio=000820.
• Full-Disclosure Mailing List, Wed Feb 18 2004 - 06:01:50 CST, Second critical mremap() bug found in all Linux kernels at http://archives.neohapsis.com/archives/fulldisclosure/2004-02/0935.html.
• Immunix Secured OS Security Advisory IMNX-2004-7+-001-01, kernel at http://www.linuxsecurity.com/content/view/105796/105/. (From LinuxSecurity archive)
• Linux Kernel ChangeLog Web page, Summary of changes from v2.4.25-rc3 to v2.4.25-rc4 at http://www.kernel.org/pub/linux/kernel/v2.4/ChangeLog-2.4.25.
• Linux Kernel Web site, The Linux Kernel Archives at http://www.kernel.org.
• slackware-security Mailing List, Wed, 18 Feb 2004 04:37:55 -0800 (PST), Kernel security update (SSA:2004-049-01) at http://www.slackware.org/security/viewer.php?l=slackware-security&y=2004&m=slackware-security.541911.
• Trustix Secure Linux Security Advisory #2004-0008, kernel at http://www.linuxsecurity.com/content/view/105778/109/. (From LinuxSecurity archive)
• BID-9686: Linux Kernel do_mremap Function VMA Limit Local Privilege Escalation Vulnerability
• CVE-2004-0077: The do_mremap function for the mremap system call in Linux 2.2 to 2.2.25, 2.4 to 2.4.24, and 2.6 to 2.6.2, does not properly check the return value from the do_munmap function when the maximum number of VMA descriptors is exceeded, which allows local users to gain root privileges, a different vulnerability than CAN-2003-0985.
• DSA-438: linux-kernel-2.4.18-alpha+i386+powerpc -- missing function return value check
• DSA-439: linux-kernel-2.4.16-arm -- several vulnerabilities
• DSA-440: linux-kernel-2.4.17-powerpc-apus -- several vulnerabilities
• DSA-441: linux-kernel-2.4.17-mips+mipsel -- missing function return value check
• DSA-442: linux-kernel-2.4.17-s390 -- several vulnerabilities
• DSA-444: linux-kernel-2.4.17-ia64 -- missing function return value check
• DSA-450: linux-kernel-2.4.19-mips -- several vulnerabilities
• DSA-453: linux-kernel-2.2.20-i386+m68k+powerpc -- failing function and TLB flush
• DSA-454: linux-kernel-2.2.22-alpha -- failing function and TLB flush
• DSA-456: linux-kernel-2.2.19-arm -- failing function and TLB flush
• DSA-466: linux-kernel-2.2.10-powerpc-apus -- failing function and TLB flush
• DSA-470: linux-kernel-2.4.17-hppa -- several vulnerabilities
• DSA-475: linux-kernel-2.4.18-hppa -- several vulnerabilities
• DSA-514: kernel-image-sparc-2.2 -- failing function and TLB flush
• GLSA-200403-02: Linux kernel do_mremap local privilege escalation vulnerability
• MDKSA-2004:015: Updated kernel packages fix multiple vulnerabilities
• MDKSA-2004:015-1: Updated x86_64 kernel packages fix multiple vulnerabilities
• RHSA-2004-065: Updated kernel packages resolve security vulnerabilities
• RHSA-2004-066: kernel security update
• RHSA-2004-069: kernel security update
• RHSA-2004-106: kernel security update
• SUSE-SA:2004:005: Linux Kernel: local privilege escalation

Reported:

Feb 18, 2004

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