Updated kernel packages that fix multiple security issues, several bugs, and add an enhancement are now available for Red Hat Enterprise Linux 5.

The Red Hat Security Response Team has rated this update as having important security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section.

The kernel packages contain the Linux kernel, the core of any Linux operating system.

This update fixes the following security issues :

* A flaw was found in sctp_packet_config() in the Linux kernel's Stream Control Transmission Protocol (SCTP) implementation. A remote attacker could use this flaw to cause a denial of service.
(CVE-2010-3432, Important)

* A missing integer overflow check was found in snd_ctl_new() in the Linux kernel's sound subsystem. A local, unprivileged user on a 32-bit system could use this flaw to cause a denial of service or escalate their privileges. (CVE-2010-3442, Important)

* A heap overflow flaw in the Linux kernel's Transparent Inter-Process Communication protocol (TIPC) implementation could allow a local, unprivileged user to escalate their privileges. (CVE-2010-3859, Important)

* An integer overflow flaw was found in the Linux kernel's Reliable Datagram Sockets (RDS) protocol implementation. A local, unprivileged user could use this flaw to cause a denial of service or escalate their privileges. (CVE-2010-3865, Important)

* A flaw was found in the Xenbus code for the unified block-device I/O interface back end. A privileged guest user could use this flaw to cause a denial of service on the host system running the Xen hypervisor. (CVE-2010-3699, Moderate)

* Missing sanity checks were found in setup_arg_pages() in the Linux kernel. When making the size of the argument and environment area on the stack very large, it could trigger a BUG_ON(), resulting in a local denial of service. (CVE-2010-3858, Moderate)

* A flaw was found in inet_csk_diag_dump() in the Linux kernel's module for monitoring the sockets of INET transport protocols. By sending a netlink message with certain bytecode, a local, unprivileged user could cause a denial of service. (CVE-2010-3880, Moderate)

* Missing sanity checks were found in gdth_ioctl_alloc() in the gdth driver in the Linux kernel. A local user with access to '/dev/gdth' on a 64-bit system could use this flaw to cause a denial of service or escalate their privileges. (CVE-2010-4157, Moderate)

* The fix for Red Hat Bugzilla bug 484590 as provided in RHSA-2009:1243 introduced a regression. A local, unprivileged user could use this flaw to cause a denial of service. (CVE-2010-4161, Moderate)

* A NULL pointer dereference flaw was found in the Bluetooth HCI UART driver in the Linux kernel. A local, unprivileged user could use this flaw to cause a denial of service. (CVE-2010-4242, Moderate)

* It was found that a malicious guest running on the Xen hypervisor could place invalid data in the memory that the guest shared with the blkback and blktap back-end drivers, resulting in a denial of service on the host system. (CVE-2010-4247, Moderate)

* A flaw was found in the Linux kernel's CPU time clocks implementation for the POSIX clock interface. A local, unprivileged user could use this flaw to cause a denial of service. (CVE-2010-4248, Moderate)

* Missing initialization flaws in the Linux kernel could lead to information leaks. (CVE-2010-3876, CVE-2010-4083, Low)

Red Hat would like to thank Dan Rosenberg for reporting CVE-2010-3442, CVE-2010-4161, and CVE-2010-4083; Thomas Pollet for reporting CVE-2010-3865; Brad Spengler for reporting CVE-2010-3858; Nelson Elhage for reporting CVE-2010-3880; Alan Cox for reporting CVE-2010-4242; and Vasiliy Kulikov for reporting CVE-2010-3876.

This update also fixes several bugs and adds an enhancement.
Documentation for the bug fixes and the enhancement will be available shortly from the Technical Notes document, linked to in the References section.

Users should upgrade to these updated packages, which contain backported patches to correct these issues, and fix the bugs and add the enhancement noted in the Technical Notes. The system must be rebooted for this update to take effect.

The remote Oracle Linux 5 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2011-0004 advisory.

    - [virt] xen: fix netback hotplug regression in xenbus fix (Laszlo Ersek) [636412 635999] {CVE-2010-3699}
    - [misc] posix-cpu-timers: workaround for mt exec problems (Oleg Nesterov) [656265 656266] {CVE-2010-4248}
    - [fs] setup_arg_pages: diagnose excessive argument size (Oleg Nesterov) [645226 645227] {CVE-2010-3858}
    - [net] inet_diag: make sure we run audited bytecode (Jiri Pirko) [651266 651267] {CVE-2010-3880}
    - [net] limit sendto/recvfrom/iovec total length to INT_MAX (Jiri Pirko) [645871 645872] {CVE-2010-3859}
    - [bluetooth] hci_ldisc: fix missing NULL check (Jarod Wilson) [655664 655666] {CVE-2010-4242}
    - [virt] xen: add bounds req-process loop in blkback/blktap (Laszlo Ersek) [656208 654546] {CVE-2010-4247}
    - [virt] xen: don't leak dev refs on bad xenbus transitions (Laszlo Ersek) [636412 635999] {CVE-2010-3699}
    - [net] rds: fix rds_iovec page count overflow (Jiri Pirko) [647421 647422] {CVE-2010-3865}
    - [net] fix deadlock in sock_queue_rcv_skb (Danny Feng) [652536 652537] {CVE-2010-4161}
    - [net] packet: fix information leak to userland (Jiri Pirko) [649897 649898] {CVE-2010-3876}
    - [ipc] sys_semctl: fix kernel stack leakage (Danny Feng) [648721 648722] {CVE-2010-4083}
    - [net] sctp: do not reset packet during sctp_packet_config (Jiri Pirko) [637866 637867] {CVE-2010-3432}
    - [scsi] gdth: prevent integer overflow in ioc_general (Frantisek Hrbata) [651175 651176] {CVE-2010-4157}
    - [sound] core: prevent heap corruption in snd_ctl_new (Jerome Marchand) [638483 638484] {CVE-2010-3442}

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

ID	名称	产品	系列	发布时间	最近更新时间	严重程度
51417	RHEL 5 : kernel (RHSA-2011:0004)	Nessus	Red Hat Local Security Checks	2011/1/5	2021/1/14	high
68176	Oracle Linux 5 : kernel (ELSA-2011-0004)	Nessus	Oracle Linux Local Security Checks	2013/7/12	2026/2/9	high

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