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Files from Jonathan Looney

First Active2014-05-01
Last Active2015-07-22
FreeBSD Security Advisory - Resource Exhaustion
Posted Jul 22, 2015
Authored by Jonathan Looney, Lawrence Stewart | Site security.freebsd.org

FreeBSD Security Advisory - TCP connections transitioning to the LAST_ACK state can become permanently stuck due to mishandling of protocol state in certain situations, which in turn can lead to accumulated consumption and eventual exhaustion of system resources, such as mbufs and sockets.

tags | advisory, tcp, protocol
systems | freebsd
advisories | CVE-2015-5358
MD5 | 0d608aa586db4fcb9ecb0d706aca3e35
FreeBSD Security Advisory - TCP Reassembly
Posted May 1, 2014
Authored by Jonathan Looney | Site security.freebsd.org

FreeBSD Security Advisory - FreeBSD may add a reassemble queue entry on the stack into the segment list when the reassembly queue reaches its limit. The memory from the stack is undefined after the function returns. Subsequent iterations of the reassembly function will attempt to access this entry. An attacker who can send a series of specifically crafted packets with a connection could cause a denial of service situation by causing the kernel to crash. Additionally, because the undefined on stack memory may be overwritten by other kernel threads, while extremely difficult, it may be possible for an attacker to construct a carefully crafted attack to obtain portion of kernel memory via a connected socket. This may result in the disclosure of sensitive information such as login credentials, etc. before or even without crashing the system.

tags | advisory, denial of service, kernel
systems | freebsd
advisories | CVE-2014-3000
MD5 | 13c2ec3c513d3b01d1581ef060cea2c1
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