A number of vulnerabilities have been discovered in the Linux kernel.

CVE-2002-0429: The iBCS routines in arch/i386/kernel/traps.c for Linux kernels 2.4.18 and earlier on x86 systems allow local users to kill arbitrary processes via a binary compatibility interface (lcall).

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.

CAN-2003-0127: The kernel module loader allows local users to gain root privileges by using ptrace to attach to a child process that is spawned by the kernel.

CAN-2003-0244: The route cache implementation in Linux 2.4, and the Netfilter IP conntrack module, allows remote attackers to cause a denial of service (CPU consumption) via packets with forged source addresses that cause a large number of hash table collisions related to the PREROUTING chain.

CAN-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.

CAN-2003-0247: Vulnerability in the TTY layer of the Linux kernel 2.4 allows attackers to cause a denial of service ('kernel oops').

CAN-2003-0248: The mxcsr code in Linux kernel 2.4 allows attackers to modify CPU state registers via a malformed address.

CAN-2003-0364: The TCP/IP fragment reassembly handling in the Linux kernel 2.4 allows remote attackers to cause a denial of service (CPU consumption) via certain packets that cause a large number of hash table collisions.

This advisory covers only the i386 (Intel IA32) architectures. Other architectures will be covered by separate advisories.

A number of vulnerabilities have been discovered in the Linux kernel.

  - CAN-2002-1380: Linux kernel 2.2.x allows local users to     cause a denial of service (crash) by using the mmap()     function with a PROT_READ parameter to access     non-readable memory pages through the /proc/pid/mem     interface.
  - CVE-2002-0429: The iBCS routines in     arch/i386/kernel/traps.c for Linux kernels 2.4.18 and     earlier on x86 systems allow local users to kill     arbitrary processes via a binary compatibility interface     (lcall)

  - 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

  - CAN-2003-0127: The kernel module loader allows local     users to gain root privileges by using ptrace to attach     to a child process that is spawned by the kernel

  - CAN-2003-0244: The route cache implementation in Linux     2.4, and the Netfilter IP conntrack module, allows     remote attackers to cause a denial of service (CPU     consumption) via packets with forged source addresses     that cause a large number of hash table collisions     related to the PREROUTING chain

  - CAN-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.

  - CAN-2003-0247: vulnerability in the TTY layer of the     Linux kernel 2.4 allows attackers to cause a denial of     service ('kernel oops')

  - CAN-2003-0248: The mxcsr code in Linux kernel 2.4 allows     attackers to modify CPU state registers via a malformed     address.

  - CAN-2003-0364: The TCP/IP fragment reassembly handling     in the Linux kernel 2.4 allows remote attackers to cause     a denial of service (CPU consumption) via certain     packets that cause a large number of hash table     collisions

This advisory provides updated 2.2.20 kernel source, and binary kernel images for the i386 architecture. Other architectures and kernel versions will be covered by separate advisories.

A number of vulnerabilities have been discovered in the Linux kernel.

  - CVE-2002-0429: The iBCS routines in     arch/i386/kernel/traps.c for Linux kernels 2.4.18 and     earlier on x86 systems allow local users to kill     arbitrary processes via a binary compatibility interface     (lcall)
  - 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

  - CAN-2003-0127: The kernel module loader allows local     users to gain root privileges by using ptrace to attach     to a child process that is spawned by the kernel

  - CAN-2003-0244: The route cache implementation in Linux     2.4, and the Netfilter IP conntrack module, allows     remote attackers to cause a denial of service (CPU     consumption) via packets with forged source addresses     that cause a large number of hash table collisions     related to the PREROUTING chain

  - CAN-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.

  - CAN-2003-0247: vulnerability in the TTY layer of the     Linux kernel 2.4 allows attackers to cause a denial of     service ('kernel oops')

  - CAN-2003-0248: The mxcsr code in Linux kernel 2.4 allows     attackers to modify CPU state registers via a malformed     address.

  - CAN-2003-0364: The TCP/IP fragment reassembly handling     in the Linux kernel 2.4 allows remote attackers to cause     a denial of service (CPU consumption) via certain     packets that cause a large number of hash table     collisions

This advisory provides corrected source code for Linux 2.4.17, and corrected binary kernel images for the mips and mipsel architectures.
Other versions and architectures will be covered by separate advisories.

A number of vulnerabilities have been discovered in the Linux kernel.

CVE-2002-0429: The iBCS routines in arch/i386/kernel/traps.c for Linux kernels 2.4.18 and earlier on x86 systems allow local users to kill arbitrary processes via a binary compatibility interface (lcall).

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.

CAN-2003-0127: The kernel module loader allows local users to gain root privileges by using ptrace to attach to a child process that is spawned by the kernel.

CAN-2003-0244: The route cache implementation in Linux 2.4, and the Netfilter IP conntrack module, allows remote attackers to cause a denial of service (CPU consumption) via packets with forged source addresses that cause a large number of hash table collisions related to the PREROUTING chain.

CAN-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.

CAN-2003-0247: Vulnerability in the TTY layer of the Linux kernel 2.4 allows attackers to cause a denial of service ('kernel oops').

CAN-2003-0248: The mxcsr code in Linux kernel 2.4 allows attackers to modify CPU state registers via a malformed address.

CAN-2003-0364: The TCP/IP fragment reassembly handling in the Linux kernel 2.4 allows remote attackers to cause a denial of service (CPU consumption) via certain packets that cause a large number of hash table collisions.

This advisory covers only the powerpc architecture. Other architectures will be covered by separate advisories.

These updated kernel packages address security vulnerabilites, including two possible data corruption scenarios. In addition, a number of drivers have been updated, improvements made to system performance, and various issues have been resolved.

The Linux kernel handles the basic functions of the operating system.

Two potential data corruption scenarios have been identified. These scenarios can occur under heavy, complex I/O loads.

The first scenario only occurs while performing memory mapped file I/O, where the file is simultaneously unlinked and the corresponding file blocks reallocated. Furthermore, the memory mapped must be to a partial page at the end of a file on an ext3 file system. As such, Red Hat considers this scenario unlikely.

The second scenario was exhibited in systems with more than 4 GB of memory with a storage controller capable of block device DMA above 4GB (64-bit DMA). By restricting storage drivers to 32-bit DMA, the problem was resolved. Prior to this errata, the SCSI subsystem was already restricted to 32-bit DMA; this errata extends the restriction to block drivers as well. The change consists of disabling 64-bit DMA in the cciss driver (the HP SA5xxx and SA6xxx RAID controllers). The performance implications of this change to the cciss driver are minimal.

In addition, the following security vulnerabilities have been addressed :

A flaw was found in several hash table implementations in the kernel networking code. A remote attacker sending packets with carefully chosen, forged source addresses could potentially cause every routing cache entry to be hashed into the same hash chain. As a result, the kernel would use a disproportionate amount of processor time to deal with the new packets, leading to a remote denial-of-service (DoS) attack. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CVE-2003-0244 to this issue.

A flaw was also found in the 'ioperm' system call, which fails to properly restrict privileges. This flaw can allow an unprivileged local user to gain read and write access to I/O ports on the system.
The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CVE-2003-0246 to this issue.

In addition, the following drivers have been updated to the versions indicated :

-aacraid: 0.9.9ac6-TEST -qlogic qla2100, qla2200, qla2300: 6.04.01
-aic7xxx_mod: 6.2.30 and aic79xx: 1.3.4 -ips: v6.00.26 -cpqfc: 2.1.2
-fusion: 2.05.00 -e100: 2.2.21-k1 -e1000: 5.0.43-k1, and added netdump support -natsemi: 1.07+LK1.0.17 -cciss: 2.4.45. -cpqarray: 2.4.26

If the system is configured to use alternate drivers, we recommend applying the kudzu errata RHEA-2003:132 prior to updating the kernel.

A number of edge conditions in the virtual memory system have been identified and resolved. These included the elimination of memory allocation failures occuring when the system had not depleted all of the physical memory. This would typically lead to process creation and network driver failures, and general performance degradation.
Additional memory reclamation improvements were introduced to further smooth out the natural system performance degradation that occur under memory exhaustion conditions.

In addition, the latest summit patches have been included.

All users should upgrade to these errata packages, which address these issues.

Several security related problems have been fixed in the Linux kernel 2.4.17 used for the S/390 architecture, mostly by backporting fixes from 2.4.18 and incorporating recent security fixes. The corrections are listed below with the identification from the Common Vulnerabilities and Exposures (CVE) project :

  - CVE-2002-0429 :
    The iBCS routines in arch/i386/kernel/traps.c for Linux     kernels 2.4.18 and earlier on x86 systems allow local     users to kill arbitrary processes via a binary     compatibility interface (lcall).

  - 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-2003-0244 :

    The route cache implementation in Linux 2.4, and the     Netfilter IP conntrack module, allows remote attackers     to cause a denial of service (CPU consumption) via     packets with forged source addresses that cause a large     number of hash table collisions related to the     PREROUTING chain.

  - CAN-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.

  - CAN-2003-0247 :

    A vulnerability in the TTY layer of the Linux kernel 2.4     allows attackers to cause a denial of service ('kernel     oops').

  - CAN-2003-0248 :

    The mxcsr code in Linux kernel 2.4 allows attackers to     modify CPU state registers via a malformed address.

  - CAN-2003-0364 :

    The TCP/IP fragment reassembly handling in the Linux     kernel 2.4 allows remote attackers to cause a denial of     service (CPU consumption) via certain packets that cause     a large number of hash table collisions.

  - CAN-2003-0961 :

    An integer overflow in brk() system call (do_brk()     function) for Linux allows a local attacker to gain root     privileges. Fixed upstream in Linux 2.4.23.

  - CAN-2003-0985 :

    Paul Starzetz discovered a flaw in bounds checking in     mremap() in the Linux kernel (present in version 2.4.x     and 2.6.x) which may allow a local attacker to gain root     privileges. Version 2.2 is not affected by this bug.
    Fixed upstream in Linux 2.4.24.

  - CAN-2004-0077 :

    Paul Starzetz and Wojciech Purczynski of isec.pl     discovered a critical security vulnerability in the     memory management code of Linux inside the mremap(2)     system call. Due to missing function return value check     of internal functions a local attacker can gain root     privileges. Fixed upstream in Linux 2.4.25 and 2.6.3.

Multiple vulnerabilities were discovered and fixed in the Linux kernel.

  - CVE-2003-0001: Multiple ethernet network card drivers do     not pad frames with null bytes which allows remote     attackers to obtain information from previous packets or     kernel memory by using special malformed packets.

  - CVE-2003-0244: The route cache implementation in the 2.4     kernel and the Netfilter IP conntrack module allows     remote attackers to cause a Denial of Service (DoS) via     CPU consumption due to packets with forged source     addresses that cause a large number of hash table     collisions related to the PREROUTING chain.

  - CVE-2003-0246: The ioperm implementation in 2.4.20 and     earlier kernels does not properly restrict privileges,     which allows local users to gain read or write access to     certain I/O ports.

  - CVE-2003-0247: A vulnerability in the TTY layer of the     2.4 kernel allows attackers to cause a kernel oops     resulting in a DoS.

  - CVE-2003-0248: The mxcsr code in the 2.4 kernel allows     attackers to modify CPU state registers via a malformed     address.

  - CVE-2003-0462: A file read race existed in the execve()     system call.

As well, a number of bug fixes were made in the 9.1 kernel including :

  - Support for more machines that did not work with APIC

    - Audigy2 support

    - New/updated modules: prims25, adiusbadsl, thinkpad,       ieee1394, orinoco, via-rhine,

  - Fixed SiS IOAPIC

    - IRQ balancing has been fixed for SMP

    - Updates to ext3

    - The previous ptrace fix has been redone to work better

    - Bugs with compiling kernels using xconfig have been       fixed

    - Problems with ipsec have been corrected

    - XFS ACLs are now present

    - gdb not working on XFS root filesystems has been fixed

MandrakeSoft encourages all users to upgrade to these new kernels.
Updated kernels will be available shortly for other supported platforms and architectures.

For full instructions on how to properly upgrade your kernel, please review http://www.mandrakesecure.net/en/docs/magic.php.

Update :

The kernels provided in MDKSA-2003:066-1 (2.4.21-0.24mdk) had a problem where all files created on any filesystem other than XFS, and using any kernel other than kernel-secure, would be created with mode 0666, or world writeable. The 0.24mdk kernels have been removed from the mirrors and users are encouraged to upgrade and remove those kernels from their systems to prevent accidentally booting into them.

That issue has been addressed and fixed with these new kernels.

Multiple vulnerabilities were discovered and fixed in the Linux kernel.

  - CVE-2003-0001: Multiple ethernet network card drivers do     not pad frames with null bytes which allows remote     attackers to obtain information from previous packets or     kernel memory by using special malformed packets.

  - CVE-2003-0244: The route cache implementation in the 2.4     kernel and the Netfilter IP conntrack module allows     remote attackers to cause a Denial of Service (DoS) via     CPU consumption due to packets with forged source     addresses that cause a large number of hash table     collisions related to the PREROUTING chain.

  - CVE-2003-0246: The ioperm implementation in 2.4.20 and     earlier kernels does not properly restrict privileges,     which allows local users to gain read or write access to     certain I/O ports.

  - CVE-2003-0247: A vulnerability in the TTY layer of the     2.4 kernel allows attackers to cause a kernel oops     resulting in a DoS.

  - CVE-2003-0248: The mxcsr code in the 2.4 kernel allows     attackers to modify CPU state registers via a malformed     address.

  - CVE-2003-0462: A file read race existed in the execve()     system call.

Kernels for 9.1/x86 are also available (see MDKSA-2003:066).

MandrakeSoft encourages all users to upgrade to these new kernels.

For full instructions on how to properly upgrade your kernel, please review http://www.mandrakesecure.net/en/docs/magic.php.

The remote host is running a kernel which is vulnerable to a remote denial 
of service.  

The Linux kernel handles all the low-level functionality of the Operating
System.  This version of the kernel is vulnerable to a flaw wherein a remote
attacker can forge source IP addresses in such a way as to create a very
long routing hash chain.  An attacker, exploiting this flaw, would need
the ability to craft TCP/IP packets destined to (or through) the Linux kernel.
A successful attack would shut down the server.

These updated kernel packages address security vulnerabilities,
including two possible data corruption scenarios. In addition, a
number of drivers have been updated, improvements made to system
performance, and various issues have been resolved.

The Linux kernel handles the basic functions of the operating system.

Two potential data corruption scenarios have been identified. These
scenarios can occur under heavy, complex I/O loads.

The first scenario only occurs while performing memory mapped file
I/O, where the file is simultaneously unlinked and the corresponding
file blocks reallocated. Furthermore, the memory mapped must be to a
partial page at the end of a file on an ext3 file system. As such, Red
Hat considers this scenario unlikely.

The second scenario was exhibited in systems with more than 4 GB of
memory with a storage controller capable of block device DMA above 4GB
(64-bit DMA). By restricting storage drivers to 32-bit DMA, the
problem was resolved. Prior to this errata, the SCSI subsystem was
already restricted to 32-bit DMA; this errata extends the restriction
to block drivers as well. The change consists of disabling 64-bit DMA
in the cciss driver (the HP SA5xxx and SA6xxx RAID controllers). The
performance implications of this change to the cciss driver are
minimal.

In addition, the following security vulnerabilities have been
addressed :

A flaw was found in several hash table implementations in the kernel
networking code. A remote attacker sending packets with carefully
chosen, forged source addresses could potentially cause every routing
cache entry to be hashed into the same hash chain. As a result, the
kernel would use a disproportionate amount of processor time to deal
with the new packets, leading to a remote denial-of-service (DoS)
attack. The Common Vulnerabilities and Exposures project
(cve.mitre.org) has assigned the name CVE-2003-0244 to this issue.

A flaw was also found in the 'ioperm' system call, which fails to
properly restrict privileges. This flaw can allow an unprivileged
local user to gain read and write access to I/O ports on the system.
The Common Vulnerabilities and Exposures project (cve.mitre.org) has
assigned the name CVE-2003-0246 to this issue.

In addition, the following drivers have been updated to the versions
indicated :

-aacraid: 0.9.9ac6-TEST -qlogic qla2100, qla2200, qla2300: 6.04.01
-aic7xxx_mod: 6.2.30 and aic79xx: 1.3.4 -ips: v6.00.26 -cpqfc: 2.1.2
-fusion: 2.05.00 -e100: 2.2.21-k1 -e1000: 5.0.43-k1, and added netdump
support -natsemi: 1.07+LK1.0.17 -cciss: 2.4.45. -cpqarray: 2.4.26

If the system is configured to use alternate drivers, we recommend
applying the kudzu errata RHEA-2003:132 prior to updating the kernel.

A number of edge conditions in the virtual memory system have been
identified and resolved. These included the elimination of memory
allocation failures occuring when the system had not depleted all of
the physical memory. This would typically lead to process creation and
network driver failures, and general performance degradation.
Additional memory reclamation improvements were introduced to further
smooth out the natural system performance degradation that occur under
memory exhaustion conditions.

In addition, the latest summit patches have been included.

All users should upgrade to these errata packages, which address these
issues.

ID	名稱	產品	系列	已發布	已更新	嚴重性
15148	Debian DSA-311-1 : linux-kernel-2.4.18 - several vulnerabilities	Nessus	Debian Local Security Checks	2004/9/29	2021/1/4	critical
15173	Debian DSA-336-1 : linux-kernel-2.2.20 - several vulnerabilities	Nessus	Debian Local Security Checks	2004/9/29	2021/1/4	critical
15169	Debian DSA-332-1 : linux-kernel-2.4.17 - several vulnerabilities	Nessus	Debian Local Security Checks	2004/9/29	2021/1/4	critical
15149	Debian DSA-312-1 : kernel-patch-2.4.18-powerpc - several vulnerabilities	Nessus	Debian Local Security Checks	2004/9/29	2021/1/4	critical
12390	RHEL 2.1 : kernel (RHSA-2003:147)	Nessus	Red Hat Local Security Checks	2004/7/6	2021/1/14	medium
15279	Debian DSA-442-1 : linux-kernel-2.4.17-s390 - several vulnerabilities	Nessus	Debian Local Security Checks	2004/9/29	2021/1/4	critical
14049	Mandrake Linux Security Advisory : kernel (MDKSA-2003:066-2)	Nessus	Mandriva Local Security Checks	2004/7/31	2021/1/6	critical
14057	Mandrake Linux Security Advisory : kernel (MDKSA-2003:074)	Nessus	Mandriva Local Security Checks	2004/7/31	2021/1/6	critical
801578	Red Hat 2003-145 Security Check	Log Correlation Engine	Generic			high
801579	Red Hat 2003-147 Security Check	Log Correlation Engine	Generic			high

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