Updated kernel packages that fix several security issues in the Red Hat Enterprise Linux 3 kernel are now available.

This security advisory has been rated as having important security impact by the Red Hat Security Response Team.

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

These new kernel packages contain fixes for the security issues described below :

  - a flaw in network IGMP processing that a allowed a     remote user on the local network to cause a denial of     service (disabling of multicast reports) if the system     is running multicast applications (CVE-2002-2185,     moderate)

  - a flaw in remap_page_range() with O_DIRECT writes that     allowed a local user to cause a denial of service     (crash) (CVE-2004-1057, important)

  - a flaw in exec() handling on some 64-bit architectures     that allowed a local user to cause a denial of service     (crash) (CVE-2005-2708, important)

  - a flaw in procfs handling during unloading of modules     that allowed a local user to cause a denial of service     or potentially gain privileges (CVE-2005-2709, moderate)

  - a flaw in IPv6 network UDP port hash table lookups that     allowed a local user to cause a denial of service (hang)     (CVE-2005-2973, important)

  - a flaw in 32-bit-compat handling of the TIOCGDEV ioctl     that allowed a local user to cause a denial of service     (crash) (CVE-2005-3044, important)

  - a network buffer info leak using the orinoco driver that     allowed a remote user to possibly view uninitialized     data (CVE-2005-3180, important)

  - a flaw in IPv4 network TCP and UDP netfilter handling     that allowed a local user to cause a denial of service     (crash) (CVE-2005-3275, important)

  - a flaw in the IPv6 flowlabel code that allowed a local     user to cause a denial of service (crash)     (CVE-2005-3806, important)

  - a flaw in network ICMP processing that allowed a local     user to cause a denial of service (memory exhaustion)     (CVE-2005-3848, important)

  - a flaw in file lease time-out handling that allowed a     local user to cause a denial of service (log file     overflow) (CVE-2005-3857, moderate)

  - a flaw in network IPv6 xfrm handling that allowed a     local user to cause a denial of service (memory     exhaustion) (CVE-2005-3858, important)

All Red Hat Enterprise Linux 3 users are advised to upgrade their kernels to the packages associated with their machine architecture and configurations as listed in this erratum.

Updated kernel packages that fix several security issues in Red Hat Enterprise Linux 2.1 are now available.

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

This advisory includes fixes for the following security issues :

iSEC Security Research discovered a VMA handling flaw in the uselib(2) system call of the Linux kernel. A local user could make use of this flaw to gain elevated (root) privileges. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CVE-2004-1235 to this issue.

iSEC Security Research discovered a flaw in the page fault handler code that could lead to local users gaining elevated (root) privileges on multiprocessor machines. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CVE-2005-0001 to this issue.

iSEC Security Research and Georgi Guninski independently discovered a flaw in the scm_send function in the auxiliary message layer. A local user could create a carefully crafted auxiliary message which could cause a denial of service (system hang). The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CVE-2004-1016 to this issue.

Kirill Korotaev found a flaw in load_elf_binary affecting kernels prior to 2.4.26. A local user could create a carefully crafted binary in such a way that it would cause a denial of service (system crash).
The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CVE-2004-1234 to this issue.

These packages also fix issues in the io_edgeport driver (CVE-2004-1017), a memory leak in ip_options_get (CVE-2004-1335), and missing VM_IO flags in some drivers (CVE-2004-1057).

A recent Internet Draft by Fernando Gont recommended that ICMP Source Quench messages be ignored by hosts. A patch to ignore these messages is included.

All Red Hat Enterprise Linux 2.1 users are advised to upgrade their kernels to the packages associated with their machine architectures and configurations as listed in this erratum.

A number of vulnerabilities are fixed in the 2.4 and 2.6 kernels with this advisory :

  - Multiple race conditions in the terminal layer of 2.4     and 2.6 kernels (prior to 2.6.9) can allow a local     attacker to obtain portions of kernel data or allow     remote attackers to cause a kernel panic by switching     from console to PPP line discipline, then quickly     sending data that is received during the switch     (CVE-2004-0814)

  - Richard Hart found an integer underflow problem in the     iptables firewall logging rules that can allow a remote     attacker to crash the machine by using a specially     crafted IP packet. This is only possible, however, if     firewalling is enabled. The problem only affects 2.6     kernels and was fixed upstream in 2.6.8 (CVE-2004-0816)

  - Stefan Esser found several remote DoS confitions in the     smbfs file system. This could be exploited by a hostile     SMB server (or an attacker injecting packets into the     network) to crash the client systems (CVE-2004-0883 and     CVE-2004-0949)

  - Paul Starzetz and Georgi Guninski reported,     independently, that bad argument handling and bad     integer arithmetics in the IPv4 sendmsg handling of     control messages could lead to a local attacker crashing     the machine. The fixes were done by Herbert Xu     (CVE-2004-1016)

  - Rob Landley discovered a race condition in the handling     of /proc/.../cmdline where, under rare circumstances, a     user could read the environment variables of another     process that was still spawning leading to the potential     disclosure of sensitive information such as passwords     (CVE-2004-1058)

  - Paul Starzetz reported that the missing serialization in     unix_dgram_recvmsg() which was added to kernel 2.4.28     can be used by a local attacker to gain elevated (root)     privileges (CVE-2004-1068)

  - Ross Kendall Axe discovered a possible kernel panic     (DoS) while sending AF_UNIX network packets if certain     SELinux-related kernel options were enabled. By default     the CONFIG_SECURITY_NETWORK and CONFIG_SECURITY_SELINUX     options are not enabled (CVE-2004-1069)

  - Paul Starzetz of isec.pl discovered several issues with     the error handling of the ELF loader routines in the     kernel. The fixes were provided by Chris Wright     (CVE-2004-1070, CVE-2004-1071, CVE-2004-1072,     CVE-2004-1073)

  - It was discovered that hand-crafted a.out binaries could     be used to trigger a local DoS condition in both the 2.4     and 2.6 kernels. The fixes were done by Chris Wright     (CVE-2004-1074)

  - Paul Starzetz found bad handling in the IGMP code which     could lead to a local attacker being able to crash the     machine. The fix was done by Chris Wright     (CVE-2004-1137)

  - Jeremy Fitzhardinge discovered two buffer overflows in     the sys32_ni_syscall() and sys32_vm86_warning()     functions that could be used to overwrite kernel memory     with attacker-supplied code resulting in privilege     escalation (CVE-2004-1151)

  - Paul Starzetz found locally exploitable flaws in the     binary format loader's uselib() function that could be     abused to allow a local user to obtain root privileges     (CVE-2004-1235)

  - Paul Starzetz found an exploitable flaw in the page     fault handler when running on SMP machines     (CVE-2005-0001)

  - A vulnerability in insert_vm_struct could allow a locla     user to trigger BUG() when the user created a large vma     that overlapped with arg pages during exec     (CVE-2005-0003)

  - Paul Starzetz also found a number of vulnerabilities in     the kernel binfmt_elf loader that could lead a local     user to obtain elevated (root) privileges     (isec-0017-binfmt_elf)

The provided packages are patched to fix these vulnerabilities. All users are encouraged to upgrade to these updated kernels.

To update your kernel, please follow the directions located at :

http://www.mandrakesoft.com/security/kernelupdate

PLEASE NOTE: Mandrakelinux 10.0 users will need to upgrade to the latest module-init-tools package prior to upgrading their kernel.
Likewise, MNF8.2 users will need to upgrade to the latest modutils package prior to upgrading their kernel.

ID	Name	Product	Family	Published	Updated	Severity
21881	CentOS 3 : kernel (CESA-2006:0140)	Nessus	CentOS Local Security Checks	7/3/2006	1/4/2021	high
20751	RHEL 3 : kernel (RHSA-2006:0140)	Nessus	Red Hat Local Security Checks	1/20/2006	1/14/2021	high
16244	RHEL 2.1 : kernel (RHSA-2005:016)	Nessus	Red Hat Local Security Checks	1/25/2005	1/14/2021	critical
16259	Mandrake Linux Security Advisory : kernel (MDKSA-2005:022)	Nessus	Mandriva Local Security Checks	1/26/2005	1/6/2021	critical

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