RHSA-2009:0001: Important: kernel security update

The kernel packages contain the Linux kernel, the core of any Linuxoperating system.These updated packages fix the following security issues: a flaw was found in the IPv4 forwarding base. This could allow a local, unprivileged user to cause a denial of service. (CVE-2007-2172,Important) a flaw was found in the handling of process death signals. This allowed a local, unprivileged user to send arbitrary signals to the suid-processexecuted by that user. Successful exploitation of this flaw depends on thestructure of the suid-program and its signal handling. (CVE-2007-3848,Important) when accessing kernel memory locations, certain Linux kernel drivers registering a fault handler did not perform required range checks. A local,unprivileged user could use this flaw to gain read or write access toarbitrary kernel memory, or possibly cause a denial of service.(CVE-2008-0007, Important) a possible kernel memory leak was found in the Linux kernel Simple Internet Transition (SIT) INET6 implementation. This could allow a local,unprivileged user to cause a denial of service. (CVE-2008-2136, Important) missing capability checks were found in the SBNI WAN driver which could allow a local, unprivileged user to bypass intended capabilityrestrictions. (CVE-2008-3525, Important) a flaw was found in the way files were written using truncate() or ftruncate(). This could allow a local, unprivileged user to acquire theprivileges of a different group and obtain access to sensitive information.(CVE-2008-4210, Important) a race condition in the mincore system core allowed a local, unprivileged user to cause a denial of service. (CVE-2006-4814, Moderate) a flaw was found in the aacraid SCSI driver. This allowed a local, unprivileged user to make ioctl calls to the driver which should otherwisebe restricted to privileged users. (CVE-2007-4308, Moderate) two buffer overflow flaws were found in the Integrated Services Digital Network (ISDN) subsystem. A local, unprivileged user could use these flawsto cause a denial of service. (CVE-2007-6063, CVE-2007-6151, Moderate) a flaw was found in the way core dump files were created. If a local, unprivileged user could make a root-owned process dump a core file into auser-writable directory, the user could gain read access to that core file,potentially compromising sensitive information. (CVE-2007-6206, Moderate) a deficiency was found in the Linux kernel virtual file system (VFS) implementation. This could allow a local, unprivileged user to attempt filecreation within deleted directories, possibly causing a denial of service.(CVE-2008-3275, Moderate)All users of Red Hat Enterprise Linux 2.1 on 32-bit architectures shouldupgrade to these updated packages which address these vulnerabilities. Forthis update to take effect, the system must be rebooted.