Linux Kernel Denial of Service and IPsec Policy Bypass

    Date25 Aug 2005
    Posted ByBrittany Day
    Two vulnerabilities have been reported in the Linux kernel, which can be exploited by malicious, local users to cause a DoS (Denial of Service) or bypass certain security restrictions.

    1) The "setsockopt()" function is not restricted to privileged users with the "CAP_NET_ADMIN" capability. This can be exploited to bypass IPsec policies or set invalid policies to exploit other vulnerabilities or exhaust available kernel memory.

    2) An error in the "syscall32_setup_pages()" function on 64-bit x86 platforms can be exploited to cause a memory leak by executing a malicious 32-bit application with specially crafted ELF headers.

    1) The vulnerability has been fixed in version 2.6.13-rc7.
    2) The vulnerability has been fixed in version 2.6.13-rc4.

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