Linux kernel ioperm system call could allow unauthorized access to I/O ports

linux-ioperm-unauth-access (12010)

High Risk

Description:

Linux kernel could allow a local attacker to gain unauthorized access to some I/O ports. The ioperm system call, which sets I/O port access permissions, fails to properly restrict privileges. This vulnerability could allow a local attacker to gain read or write access to some I/O ports.

Platforms Affected:

• Conectiva, Linux 8.0
• Conectiva, Linux 9.0
• Debian, Debian Linux 3.0
• EngardeLinux, Secure Linux
• EngardeLinux, Secure Professional
• Gentoo, Linux
• Linux, Kernel 2.4.0
• 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 2.4.19
• Linux, Kernel 2.4.2
• Linux, Kernel 2.4.20
• 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 2.5.0
• 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
• MandrakeSoft, Mandrake Linux 8.2
• MandrakeSoft, Mandrake Linux 8.2 PPC
• MandrakeSoft, Mandrake Linux 9.0
• MandrakeSoft, Mandrake Linux 9.1
• MandrakeSoft, Mandrake Linux 9.1 PPC
• MandrakeSoft, Mandrake Linux Corporate Server 2.1
• MandrakeSoft, Mandrake Multi Network Firewall 8.2
• RedHat, Enterprise Linux 2.1 ES
• RedHat, Enterprise Linux 2.1 AS
• RedHat, Enterprise Linux 2.1 WS
• RedHat, Linux 7.1
• RedHat, Linux 7.2
• RedHat, Linux 7.3
• RedHat, Linux 8.0
• RedHat, Linux 9.0
• Turbolinux, Turbolinux 7 Server
• Turbolinux, Turbolinux 7 Workstation
• Turbolinux, Turbolinux 8 Server
• Turbolinux, Turbolinux 8 Workstation

Remedy:

For Red Hat Linux:
Upgrade to the latest kernel package, as listed below. Refer to RHSA-2003:172-23 for more information. See References.

Red Hat 7.1, 7.2, and 7.3: 2.4.20-13.7 or later
Red Hat 8.0: 2.4.20-13.8 or later
Red Hat 9: 2.4.20-13.9 or later

For Mandrake Linux 9.1:
Upgrade to the latest version of kernel (2.4.21.0.25mdk-1-1mdk or later), as listed in MandrakeSoft Security Advisory MDKSA-2003:066-2: kernel. See References.

For Debian GNU/Linux 3.0 (woody):
Upgrade to the latest kernel package (2.2.20-5woody2 or 2.2.20-5woody3 or later), as listed in DSA-336-1. See References.

For Debian GNU/Linux 3.0 (woody):
Upgrade to the latest kernel powerpc package (2.4.18-1woody1 or later), as listed in DSA-312-1. See References.

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 EnGarde Secure Linux Community Edition and Professional Edition:
Upgrade to the latest kernel update, as listed in Guardian Digital Security Advisory ESA-20030515-017. See References.

For Turbolinux:
Upgrade to the latest kernel package, as listed below. Refer to Turbolinux Security Advisory TLSA-2003-41 for more information. See References.

Turbolinux: 2.4.18-13 or later

For Conectiva Linux 8:
Upgrade to the latest version of kernel (2.4.19-1U80_18cl or later), as listed in Conectiva Linux Security Announcement CLSA-2003:796. See References.

For Conectiva Linux 9:
Upgrade to the latest version of kernel (2.4.21-31301U90_4cl or later), as listed in Conectiva Linux Security Announcement CLSA-2003:702. See References.

For Gentoo Linux:
Upgrade to the latest version of gentoo-sources (2.4.20-r6 or later), as listed in Gentoo Linux Security Announcement 200308-01. See References.

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

Consequences:

Gain Privileges

References:

• Conectiva Linux Security Announcement CLSA-2003:702, kernel at http://distro.conectiva.com/atualizacoes/index.php?id=a&anuncio=000701.
• Conectiva Linux Security Announcement CLSA-2003:796, kernel at http://distro.conectiva.com/atualizacoes/index.php?id=a&anuncio=000796.
• Gentoo Linux Security Announcement 200308-01, gentoo-sources at http://www.zone-h.org/advisories/read/id=2887.
• Guardian Digital Security Advisory ESA-20030515-017, kernel at http://lwn.net/Alerts/32423/.
• Linux 2.5 kernel bug tracker, Bugzilla Bug 703 - Security vulnerability in "ioperm" system call at http://bugme.osdl.org/show_bug.cgi?id=703.
• Linux-Kernel Mailing List, 2003-05-12 3:03:33, [Bug 703] New: Security vulnerability in "ioperm" system call at http://marc.theaimsgroup.com/?l=linux-kernel&m=105271679705571&w=2.
• VulnWatch Mailing List, Tue May 20 2003 - 18:32:17 CDT, Linux 2.4 kernel ioperm vuln at http://archives.neohapsis.com/archives/vulnwatch/2003-q2/0076.html.
• BID-7600: Linux Kernel IOPERM System Call I/O Port Access Vulnerability
• CVE-2003-0246: The ioperm system call in Linux kernel 2.4.20 and earlier does not properly restrict privileges, which allows local users to gain read or write access to certain I/O ports.
• DSA-311: linux-kernel-2.4.18 -- several vulnerabilities
• DSA-312: kernel-patch-2.4.18-powerpc -- several vulnerabilities
• DSA-332: linux-kernel-2.4.17 -- several vulnerabilities
• DSA-336: linux-kernel-2.2.20 -- several vulnerabilities
• DSA-442: linux-kernel-2.4.17-s390 -- several vulnerabilities
• MDKSA-2003:066: Updated kernel packages fix multiple vulnerabilities
• MDKSA-2003:066-1: Updated kernel packages fix multiple vulnerabilities
• MDKSA-2003:066-2: Updated kernel packages fix multiple vulnerabilities
• MDKSA-2003:074: Updated kernel packages fix multiple vulnerabilities
• RHSA-2003-147: kernel security update
• RHSA-2003-172: Updated 2.4 kernel fixes security vulnerabilities and various bugs

Reported:

May 14, 2003

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