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CVE-2014-3000

Status Candidate

Overview

The TCP reassembly function in the inet module in FreeBSD 8.3 before p16, 8.4 before p9, 9.1 before p12, 9.2 before p5, and 10.0 before p2 allows remote attackers to cause a denial of service (undefined memory access and system crash) or possibly read system memory via multiple crafted packets, related to moving a reassemble queue entry to the segment list when the queue is full.

Related Files

Debian Security Advisory 2952-1
Posted Jun 6, 2014
Authored by Debian | Site debian.org

Debian Linux Security Advisory 2952-1 - Several vulnerabilities have been discovered in the FreeBSD kernel that may lead to a denial of service or possibly disclosure of kernel memory.

tags | advisory, denial of service, kernel, vulnerability
systems | linux, freebsd, debian
advisories | CVE-2014-1453, CVE-2014-3000, CVE-2014-3880
SHA-256 | ed9ae58961ec6726a952124bc8bfc4359b78791bff785b07a58275d25c075aa7
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
SHA-256 | d62c34826b3a2bc95a7e65269fe0450176f9725427c19e3e4f8ef9f1b1720479
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