受影响系统：
Linux kernel 2.4.20
- RedHat Linux 9.0
描述：
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BUGTRAQ ID: 10599

Linux是一款开放源代码操作系统。

Linux Kernel Broadcom 5820 Cryptonet驱动存在一个整数溢出问题，本地攻击者可以利用这个漏洞对系统进行拒绝服务攻击或提升权限。

此驱动程序包含ubsec_ioctl()函数用于设置驱动的操作参数，函数接收用户提供数据并拷贝到内核空间。当拷贝数据时，用户提供的长度值用于一个计算操作，但由于对数据缺少充分检查，当分配缓冲区空间时此计算可导致整数溢出。

利用这个漏洞可导致系统崩溃或可能以内核上下文执行任意指令。

<*来源：Binfamous41md （infamous41md@hotpop.com）

链接：http://marc.theaimsgroup.com/?l=bugtraq&m=108802653409053&w=2
*>

建议：
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厂商补丁：

RedHat
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目前厂商已经发布了升级补丁以修复这个安全问题，请到厂商的主页下载：

RedHat Fedora Core1:

RedHat Upgrade kernel-2.4.22-1.2197.nptl.x86_64.rpm
http://download.fedora.redhat.com/pub/fedora/linux/core/updates/1/
RedHat Fedora Core 1

RedHat Upgrade kernel-smp-2.4.22-1.2197.nptl.x86_64.rpm
http://download.fedora.redhat.com/pub/fedora/linux/core/updates/1/
RedHat Fedora Core 1

RedHat Upgrade kernel-debuginfo-2.4.22-1.2197.nptl.x86_64.rpm
http://download.fedora.redhat.com/pub/fedora/linux/core/updates/1/
RedHat Fedora Core 1

RedHat Upgrade kernel-BOOT-2.4.22-1.2197.nptl.i386.rpm
http://download.fedora.redhat.com/pub/fedora/linux/core/updates/1/
RedHat Fedora Core 1

RedHat Upgrade kernel-debuginfo-2.4.22-1.2197.nptl.i386.rpm
http://download.fedora.redhat.com/pub/fedora/linux/core/updates/1/
RedHat Fedora Core 1

RedHat Upgrade kernel-2.4.22-1.2197.nptl.i586.rpm
http://download.fedora.redhat.com/pub/fedora/linux/core/updates/1/
RedHat Fedora Core 1

RedHat Upgrade kernel-smp-2.4.22-1.2197.nptl.i586.rpm
http://download.fedora.redhat.com/pub/fedora/linux/core/updates/1/
RedHat Fedora Core 1

RedHat Upgrade kernel-debuginfo-2.4.22-1.2197.nptl.i586.rpm
http://download.fedora.redhat.com/pub/fedora/linux/core/updates/1/
RedHat Fedora Core 1

RedHat Upgrade kernel-2.4.22-1.2197.nptl.i686.rpm
http://download.fedora.redhat.com/pub/fedora/linux/core/updates/1/
RedHat Fedora Core 1

RedHat Upgrade kernel-smp-2.4.22-1.2197.nptl.i686.rpm
http://download.fedora.redhat.com/pub/fedora/linux/core/updates/1/
RedHat Fedora Core 1

RedHat Upgrade kernel-2.4.22-1.2197.nptl.athlon.rpm
http://download.fedora.redhat.com/pub/fedora/linux/core/updates/1/
RedHat Fedora Core 1

RedHat Upgrade kernel-smp-2.4.22-1.2197.nptl.athlon.rpm
http://download.fedora.redhat.com/pub/fedora/linux/core/updates/1/
RedHat Fedora Core 1