Ubuntu安全公告USN-1460-1

[cnIT]

Ubuntu的安全公告1460-1 - Linux内核的KVM（内核虚拟机）虚拟CPU设置中发现一个缺陷。
当地一个非特权用户可能利用此漏洞导致拒绝服务系统崩溃。 史蒂夫·格拉布报告一个缺陷与Linux fscaps（文件系统的基本功能），使用时要增加一个进程的权限。
对于应用程序上fscaps在使用本地攻击者可以禁用的地址空间随机化，使提出的特权更容易攻击的过程。

============================================================================
Ubuntu Security Notice USN-1460-1
May 31, 2012

linux-ti-omap4 vulnerabilities
============================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 12.04 LTS

Summary:

Several security issues were fixed in the kernel.

Software Description:
- linux-ti-omap4: Linux kernel for OMAP4

Details:

A flaw was found in the Linux kernel's KVM (Kernel Virtual Machine) virtual
cpu setup. An unprivileged local user could exploit this flaw to crash the
system leading to a denial of service. (CVE-2012-1601)

Steve Grubb reported a flaw with Linux fscaps (file system base
capabilities) when used to increase the permissions of a process. For
application on which fscaps are in use a local attacker can disable address
space randomization to make attacking the process with raised privileges
easier. (CVE-2012-2123)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 12.04 LTS:
linux-image-3.2.0-1413-omap4 3.2.0-1413.17

After a standard system update you need to reboot your computer to make
all the necessary changes.

ATTENTION: Due to an unavoidable ABI change the kernel updates have
been given a new version number, which requires you to recompile and
reinstall all third party kernel modules you might have installed. If
you use linux-restricted-modules, you have to update that package as
well to get modules which work with the new kernel version. Unless you
manually uninstalled the standard kernel metapackages (eg linux-generic,
linux-server, linux-powerpc), a standard system upgrade will automatically
perform this as well.

References:
http://www.ubuntu.com/usn/usn-1460-1
CVE-2012-1601, CVE-2012-2123

Package Information:
https://launchpad.net/ubuntu/+source/li ... .0-1413.17

[南宁仔]

这个，看不明白，很危险么？补丁呢？

[qy117121]

我应该 没用到kvm

[cnIT]

这个，看不明白，很危险么？补丁呢？

危险等级补丁看着！
http://people.canonical.com/~ubuntu-sec ... -1601.html