Linux kernel ELF binfmt_elf loader mmap privilege escalation

linux-elf-setuid-gain-privileges (18025)

High Risk

Description:

The Linux kernel ELF loader (binfmt_elf.c) could allow a local attacker to gain elevated privileges on the system, caused by improper handling of failed calls to the mmap function. An attacker could exploit this vulnerability to execute arbitrary code on the system.

Platforms Affected:

• Debian, Debian Linux 3.0
• Debian, Debian Linux 3.1
• Debian, Debian Linux 4.0
• Gentoo, Linux
• 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 2.4.3
• 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 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 test9
• Linux, Kernel 2.6.0 test9-cvs
• Linux, Kernel 2.6.0 test11
• Linux, Kernel 2.6.0
• Linux, Kernel 2.6.0 test1
• Linux, Kernel 2.6.0 test10
• Linux, Kernel 2.6.1 rc2
• Linux, Kernel 2.6.1 rc1
• Linux, Kernel 2.6.1
• 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
• Linux, Kernel 2.6.8 rc1
• Linux, Kernel 2.6.8 rc2
• Linux, Kernel 2.6.8 rc3
• MandrakeSoft, Mandrake Linux 10.0 AMD64
• MandrakeSoft, Mandrake Linux 10.0
• MandrakeSoft, Mandrake Linux 10.1 X86_64
• MandrakeSoft, Mandrake Linux 10.1
• MandrakeSoft, Mandrake Linux 9.2 AMD64
• MandrakeSoft, Mandrake Linux 9.2
• MandrakeSoft, Mandrake Linux Corporate Server 2.1 X86_64
• MandrakeSoft, Mandrake Linux Corporate Server 2.1
• MandrakeSoft, Mandrake Linux Corporate Server 3.0
• MandrakeSoft, Mandrake Multi Network Firewall 8.2
• Novell, Linux Desktop 9
• RedHat, Enterprise Linux 2.1 WS
• RedHat, Enterprise Linux 2.1 AS
• RedHat, Enterprise Linux 2.1 ES
• RedHat, Enterprise Linux 3 WS
• RedHat, Enterprise Linux 3 ES
• RedHat, Enterprise Linux 3 AS
• RedHat, Enterprise Linux 3 Desktop
• RedHat, Linux Advanced Workstation 2.1 Itanium
• RedHat, RHEL Extras 3
• SuSE, Linux Enterprise Server 8
• SuSE, Linux Enterprise Server 9
• SuSE, SuSE Linux 8.1
• SuSE, SuSE Linux 8.2
• SuSE, SuSE Linux 9.0
• SuSE, SuSE Linux 9.1
• SuSE, SuSE Linux 9.2
• SuSE, SuSE Linux Desktop 1.0
• Trustix, Secure Enterprise Linux 2.0
• Trustix, Secure Linux 1.5
• Trustix, Secure Linux 2.0
• Trustix, Secure Linux 2.1
• Trustix, Secure Linux 2.2
• Turbolinux, Turbolinux 10 Server

Remedy:

For Trustix Secure Linux:
Upgrade to the latest kernel package, as listed below. Refer to Trustix Secure Linux Security Advisory #2004-0061 for more information. See References.

Trustix Secure Linux 2.2: 2.4.28-3tr or later
Trustix Secure Linux 2.1: 2.4.28-0.4tr or later
Trustix Secure Linux 2.0: 2.4.28-0.3tr or later

For TurboLinux:
Upgrade to the latest kernel package (2.6.8-3 or later), as listed in Turbolinux Security Advisory TLSA-2004-34. See References.

For Ubuntu Linux:
Upgrade to the latest linux-image package (2.6.8.1-16.1 or later), as listed in USN-30-1 November 18, 2004. See References.

For Red Hat Linux:
Refer to RHSA-2005:293-16, RHSA-2006:0190-5, or RHSA-2006:0191-9 for patch, upgrade, or suggested workaround information. See References.

For Red Hat Linux (ia32el):
Refer to RHSA-2005:275-09 for patch, upgrade, or suggested workaround information. See References.

For SUSE Linux:
Upgrade to the latest kernel package, as listed in SUSE-SA:2004:042, 2004. See References.

For Gentoo Linux:
Upgrade to the latest version of cups (1.1.23_rc1 or later), as listed in GLSA 200412-25. See References.

For Debian GNU/Linux:
Refer to DSA-1070-1, DSA-1069-1, DSA-1067-1, or DSA-1082-1 for patch, upgrade, or suggested workaround information. See References.

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

Consequences:

Gain Privileges

References:

• CIAC Information Bulletin P-047, Red Hat Updated Kernel Packages at http://www.ciac.org/ciac/bulletins/p-047.shtml.
• Full-Disclosure Mailing List, Wed Nov 10 2004 - 05:59:25 CST, Linux ELF loader vulnerabilities at http://archives.neohapsis.com/archives/fulldisclosure/2004-11/0288.html.
• Full-Disclosure Mailing List, Wed Nov 10 2004 - 21:12:03 CST, Re: Linux ELF loader vulnerabilities at http://archives.neohapsis.com/archives/fulldisclosure/2004-11/0314.html.
• Linux Kernel Web site, The Linux Kernel Archives at http://kernel.org/.
• Trustix Secure Linux Security Advisory #2004-0061, Multiple vulnerabilities at http://www.trustix.net/errata/2004/0061/.
• BID-11646: Linux Kernel BINFMT_ELF Loader Local Privilege Escalation Vulnerabilities
• CVE-2004-1071: The binfmt_elf loader (binfmt_elf.c) in Linux kernel 2.4.x up to 2.4.27, and 2.6.x up to 2.6.8, does not properly handle a failed call to the mmap function, which causes an incorrect mapped image and may allow local users to execute arbitrary code.
• DSA-1067: kernel-source-2.4.16 -- several vulnerabilities
• DSA-1069: kernel-source-2.4.18 -- several vulnerabilities
• DSA-1070: kernel-source-2.4.19 -- several vulnerabilities
• DSA-1082: kernel-source-2.4.17 -- several vulnerabilities
• DSA-1286: linux-2.6 -- several vulnerabilities
• DSA-1304: kernel-source-2.6.8 -- several vulnerabilities
• MDKSA-2005:022: Updated kernel packages fix multiple vulnerabilities
• RHSA-2004-504: Updated Itanium kernel packages resolve security issues
• RHSA-2004-505: Updated kernel packages fix security vulnerability
• RHSA-2004-549: kernel security update
• RHSA-2005-275: ia32el security update
• RHSA-2005-293: kernel security update
• RHSA-2006-0190: kernel security update
• RHSA-2006-0191: kernel security update
• SA19607: SGI ProPack kernel Multiple Vulnerabilities
• SUSE-SA:2004:042: kernel: local and remote denial of service
• SUSE-SR:2004:002: SUSE Security Summary Report
• SUSE-SR:2004:003: SUSE Security Summary Report

Reported:

Nov 10, 2004

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