__________________________________________________________ The U.S. Department of Energy Computer Incident Advisory Capability ___ __ __ _ ___ / | /_\ / \___ __|__ / \ \___ __________________________________________________________ INFORMATION BULLETIN Debian Linux-Kernel-2.4.17-ia64 Vulnerabilities [DSA-423-1] January 15, 2004 18:00 GMT Number O-059 [REVISED 2 Mar 2004] ______________________________________________________________________________ PROBLEM: The IA-64 maintainers fixed several security related bugs in the Linux kernel 2.4.17 used for the IA-64 architecture. PLATFORM: Linux kernel 2.4.17-ia64 DAMAGE: The most serious of these vulnerabilities may allow an unprivileged local user to gain root access. SOLUTION: Install the security update. ______________________________________________________________________________ VULNERABILITY The risk is MEDIUM. An unprivileged local use may gain root ASSESSMENT: access. ______________________________________________________________________________ LINKS: CIAC BULLETIN: http://www.ciac.org/ciac/bulletins/o-059.shtml ORIGINAL BULLETIN: Debian Security Advisory DSA-423-1 http://www.debian.org/security/2004/dsa-423 Debian Security Advisory DSA-442-1 http://www.debian.org/security/2004/dsa-423 CVE/CAN: http://www.cve.mitre.org/cgi-bin/cvename.cgi?name= CVE-2003-0001, CVE-2003-0018, CVE-2003-0127, CVE-2003-0461, CVE-2003-0462, CVE-2003-0476, CVE-2003-0501, CVE-2003-0550, CVE-2003-0551, CVE-2003-0552, CVE-2003-0961, CVE-2003-0985 ______________________________________________________________________________ Revision History: 3/2/04 - Added link to Debian DSA 442-1 for patches fixing vulnerabilities on network interface card (NIC) device drivers and for the do_brk function. [***** Start DSA-423-1 *****] Debian Security Advisory DSA-423-1 linux-kernel-2.4.17-ia64 -- several vulnerabilities Date Reported: 15 Jan 2004 Affected Packages: kernel-image-2.4.17-ia64 Vulnerable: Yes Security database references: In Mitre's CVE dictionary: CAN-2003-0001, CAN-2003-0018, CAN-2003-0127, CAN-2003-0461, CAN-2003-0462, CAN-2003-0476, CAN-2003-0501, CAN-2003-0550, CAN-2003-0551, CAN-2003-0552, CAN-2003-0961, CAN-2003-0985. More information: The IA-64 maintainers fixed several security related bugs in the Linux kernel 2.4.17 used for the IA-64 architecture, mostly by backporting fixes from 2.4.18. The corrections are listed below with the identification from the Common Vulnerabilities and Exposures (CVE) project: * CAN-2003-0001: Multiple ethernet network interface card (NIC) device drivers do not pad frames with null bytes, which allows remote attackers to obtain information from previous packets or kernel memory by using malformed packets, as demonstrated by Etherleak. * CAN-2003-0018: Linux kernel 2.4.10 through 2.4.21-pre4 does not properly handle the O_DIRECT feature, which allows local attackers with write privileges to read portions of previously deleted files, or cause file system corruption. * CAN-2003-0127: The kernel module loader in Linux kernel 2.2.x before 2.2.25, and 2.4.x before 2.4.21, allows local users to gain root privileges by using ptrace to attach to a child process which is spawned by the kernel. * CAN-2003-0461: The virtual file /proc/tty/driver/serial in Linux 2.4.x reveals the exact number of characters used in serial links, which could allow local users to obtain potentially sensitive information such as the length of passwords. * CAN-2003-0462: A race condition in the way env_start and env_end pointers are initialized in the execve system call and used in fs/proc/base.c on Linux 2.4 allows local users to cause a denial of service (crash). * CAN-2003-0476: The execve system call in Linux 2.4.x records the file descriptor of the executable process in the file table of the calling process, which allows local users to gain read access to restricted file descriptors. * CAN-2003-0501: The /proc filesystem in Linux allows local users to obtain sensitive information by opening various entries in /proc/self before executing a setuid program, which causes the program to fail to change the ownership and permissions of those entries. * CAN-2003-0550: The STP protocol, as enabled in Linux 2.4.x, does not provide sufficient security by design, which allows attackers to modify the bridge topology. * CAN-2003-0551: The STP protocol implementation in Linux 2.4.x does not properly verify certain lengths, which could allow attackers to cause a denial of service. * CAN-2003-0552: Linux 2.4.x allows remote attackers to spoof the bridge Forwarding table via forged packets whose source addresses are the same as the target. * CAN-2003-0961: An integer overflow in brk system call (do_brk function) for Linux kernel 2.4.22 and earlier allows local users to gain root privileges. * CAN-2003-0985: The mremap system call (do_mremap) in Linux kernel 2.4 and 2.6 does not properly perform boundary checks, which allows local users to cause a denial of service and possibly gain privileges by causing a remapping of a virtual memory area (VMA) to create a zero length VMA. For the stable distribution (woody) this problem has been fixed in version kernel-image-2.4.17- ia64 for the ia64 architecture. Other architectures are already or will be fixed separately. For the unstable distribution (sid) this problem will be fixed soon with newly uploaded packages. Fixed in: Debian GNU/Linux 3.0 (woody) Source: http://security.debian.org/pool/updates/main/k/kernel-image-2.4.17-ia64/kernel-image-2.4.17-ia64_ 011226.15.dsc http://security.debian.org/pool/updates/main/k/kernel-image-2.4.17-ia64/kernel-image-2.4.17-ia64_ 011226.15.tar.gz Architecture-independent component: http://security.debian.org/pool/updates/main/k/kernel-image-2.4.17-ia64/kernel-source-2.4.17-ia64_ 011226.15_all.deb Intel IA-64: http://security.debian.org/pool/updates/main/k/kernel-image-2.4.17-ia64/kernel-headers-2.4.17-ia64_ 011226.15_ia64.deb http://security.debian.org/pool/updates/main/k/kernel-image-2.4.17-ia64/kernel-image-2.4.17-itanium_ 011226.15_ia64.deb http://security.debian.org/pool/updates/main/k/kernel-image-2.4.17-ia64/kernel-image-2.4.17-itanium- smp_011226.15_ia64.deb http://security.debian.org/pool/updates/main/k/kernel-image-2.4.17-ia64/kernel-image-2.4.17-mckinley_ 011226.15_ia64.deb http://security.debian.org/pool/updates/main/k/kernel-image-2.4.17-ia64/kernel-image-2.4.17-mckinley- smp_011226.15_ia64.deb MD5 checksums of the listed files are available in the original advisory. -------------------------------------------------------------------------------- This page is also available in the following languages: dansk How to set the default document language -------------------------------------------------------------------------------- See the Debian contact page for information on contacting us. Last Modified: Thu, Jan 15 14:36:49 UTC 2004 Copyright © 2004 SPI; See license terms Debian is a registered trademark of Software in the Public Interest, Inc. [***** End DSA-423-1 *****] _______________________________________________________________________________ CIAC wishes to acknowledge the contributions of Debian for the information contained in this bulletin. _______________________________________________________________________________ CIAC, the Computer Incident Advisory Capability, is the computer security incident response team for the U.S. Department of Energy (DOE) and the emergency backup response team for the National Institutes of Health (NIH). CIAC is located at the Lawrence Livermore National Laboratory in Livermore, California. CIAC is also a founding member of FIRST, the Forum of Incident Response and Security Teams, a global organization established to foster cooperation and coordination among computer security teams worldwide. 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Neither the United States Government nor the University of California nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial products, process, or service by trade name, trademark, manufacturer, or otherwise, does not necessarily constitute or imply its endorsement, recommendation or favoring by the United States Government or the University of California. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or the University of California, and shall not be used for advertising or product endorsement purposes. 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