Security fixes :

  - A race condition in the way asynchronous I/O and     fallocate() interacted when using ext4 could allow a     local, unprivileged user to obtain random data from a     deleted file. (CVE-2012-4508, Important)

  - A flaw in the way the Xen hypervisor implementation     range checked guest provided addresses in the     XENMEM_exchange hypercall could allow a malicious,     para-virtualized guest administrator to crash the     hypervisor or, potentially, escalate their privileges,     allowing them to execute arbitrary code at the     hypervisor level. (CVE-2012-5513, Important)

  - A flaw in the Reliable Datagram Sockets (RDS) protocol     implementation could allow a local, unprivileged user to     cause a denial of service. (CVE-2012-2372, Moderate)

  - A race condition in the way access to inet->opt     ip_options was synchronized in the Linux kernel's TCP/IP     protocol suite implementation. Depending on the network     facing applications running on the system, a remote     attacker could possibly trigger this flaw to cause a     denial of service. A local, unprivileged user could use     this flaw to cause a denial of service regardless of the     applications the system runs. (CVE-2012-3552, Moderate)

  - The Xen hypervisor implementation did not properly     restrict the period values used to initialize per VCPU     periodic timers. A privileged guest user could cause an     infinite loop on the physical CPU. If the watchdog were     enabled, it would detect said loop and panic the host     system. (CVE-2012-4535, Moderate)

  - A flaw in the way the Xen hypervisor implementation     handled set_p2m_entry() error conditions could allow a     privileged, fully-virtualized guest user to crash the     hypervisor. (CVE-2012-4537, Moderate)

Bug fixes :

  - Previously, the interrupt handlers of the qla2xxx driver     could clear pending interrupts right after the IRQ lines     were attached during system start-up. Consequently, the     kernel could miss the interrupt that reported completion     of the link initialization, and the qla2xxx driver then     failed to detect all attached LUNs. With this update,     the qla2xxx driver has been modified to no longer clear     interrupt bits after attaching the IRQ lines. The driver     now correctly detects all attached LUNs as expected.

  - The Ethernet channel bonding driver reported the MII     (Media Independent Interface) status of the bond     interface in 802.3ad mode as being up even though the     MII status of all of the slave devices was down. This     could pose a problem if the MII status of the bond     interface was used to determine if failover should     occur. With this update, the agg_device_up() function     has been added to the bonding driver, which allows the     driver to report the link status of the bond interface     correctly, that is, down when all of its slaves are     down, in the 802.3ad mode.

Enhancements :

  - This update backports several changes from the latest     upstream version of the bnx2x driver. The most important     change, the remote-fault link detection feature, allows     the driver to periodically scan the physical link layer     for remote faults. If the physical link appears to be up     and a fault is detected, the driver indicates that the     link is down. When the fault is cleared, the driver     indicates that the link is up again.

  - The INET socket interface has been modified to send a     warning message when the ip_options structure is     allocated directly by a third-party module using the     kmalloc() function.

The system must be rebooted for this update to take effect.

USN-1704-1 fixed vulnerabilities in the Linux kernel. Due to an unrelated regression inotify/fanotify stopped working after upgrading.
This update fixes the problem.

We apologize for the inconvenience.

Brad Spengler discovered a flaw in the Linux kernel's uname system call. An unprivileged user could exploit this flaw to read kernel stack memory. (CVE-2012-0957)

Jon Howell reported a flaw in the Linux kernel's KVM (Kernel-based virtual machine) subsystem's handling of the XSAVE feature. On hosts, using qemu userspace, without the XSAVE feature an unprivileged local attacker could exploit this flaw to crash the system. (CVE-2012-4461)

Dmitry Monakhov reported a race condition flaw the Linux ext4 filesystem that can expose stale data. An unprivileged user could exploit this flaw to cause an information leak.
(CVE-2012-4508)

A flaw was discovered in the Linux kernel's handling of script execution when module loading is enabled. A local attacker could exploit this flaw to cause a leak of kernel stack contents. (CVE-2012-4530)

Rodrigo Freire discovered a flaw in the Linux kernel's TCP illinois congestion control algorithm. A local attacker could use this to cause a denial of service. (CVE-2012-4565)

A flaw was discovered in the Linux kernel's handling of new hot-plugged memory. An unprivileged local user could exploit this flaw to cause a denial of service by crashing the system. (CVE-2012-5517)

Florian Weimer discovered that hypervkvpd, which is distributed in the Linux kernel, was not correctly validating source addresses of netlink packets. An untrusted local user can cause a denial of service by causing hypervkvpd to exit. (CVE-2012-5532).

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

It was discovered that hypervkvpd, which is distributed in the Linux kernel, was not correctly validating the origin on Netlink messages.
An untrusted local user can cause a denial of service of Linux guests in Hyper-V virtualization environments. (CVE-2012-2669)

Dmitry Monakhov reported a race condition flaw the Linux ext4 filesystem that can expose stale data. An unprivileged user could exploit this flaw to cause an information leak. (CVE-2012-4508)

Florian Weimer discovered that hypervkvpd, which is distributed in the Linux kernel, was not correctly validating source addresses of netlink packets. An untrusted local user can cause a denial of service by causing hypervkvpd to exit. (CVE-2012-5532)

Andrew Cooper of Citrix reported a Xen stack corruption in the Linux kernel. An unprivileged user in a 32bit PVOPS guest can cause the guest kernel to crash, or operate erroneously. (CVE-2013-0190).

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Dmitry Monakhov reported a race condition flaw the Linux ext4 filesystem that can expose stale data. An unprivileged user could exploit this flaw to cause an information leak. (CVE-2012-4508)

An information leak was discovered in the Linux kernel's tkill and tgkill system calls when used from compat processes. A local user could exploit this flaw to examine potentially sensitive kernel memory. (CVE-2013-2141)

Kees Cook discovered a format string vulnerability in the Broadcom B43 wireless driver for the Linux kernel. A local user could exploit this flaw to gain administrative privileges. (CVE-2013-2852).

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

ID	名称	产品	系列	发布时间	最近更新时间	严重程度
63183	Scientific Linux Security Update : kernel on SL5.x i386/x86_64 (20121204)	Nessus	Scientific Linux Local Security Checks	2012/12/7	2021/1/14	medium
64436	Ubuntu 12.04 LTS : linux-lts-quantal - Linux kernel hardware enablement from Quantal regression (USN-1704-2)	Nessus	Ubuntu Local Security Checks	2013/2/4	2019/9/19	medium
64618	Ubuntu 11.10 : linux vulnerabilities (USN-1720-1)	Nessus	Ubuntu Local Security Checks	2013/2/13	2019/9/19	medium
67190	Ubuntu 10.04 LTS : linux vulnerabilities (USN-1899-1)	Nessus	Ubuntu Local Security Checks	2013/7/5	2019/9/19	medium

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