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Files from Tzafrir Cohen

Email addresstzafrir.cohen at xorcom.com
First Active2008-06-05
Last Active2017-12-14
Asterisk Project Security Advisory - AST-2017-012
Posted Dec 14, 2017
Authored by Joshua Colp, Tzafrir Cohen, Vitezslav Novy | Site asterisk.org

Asterisk Project Security Advisory - If a compound RTCP packet is received containing more than one report (for example a Receiver Report and a Sender Report) the RTCP stack will incorrectly store report information outside of allocated memory potentially causing a crash.

tags | advisory
SHA-256 | ad570e142eb4ed64ce1d02cb9f2d12edb9da7bbfbc9262b5c740e7b5ad1dc490
Asterisk Project Security Advisory - AST-2011-005
Posted Apr 21, 2011
Authored by Tzafrir Cohen | Site asterisk.org

Asterisk Project Security Advisory - On systems that have the Asterisk Manager Interface, Skinny, SIP over TCP, or the built in HTTP server enabled, it is possible for an attacker to open as many connections to asterisk as he wishes. This will cause Asterisk to run out of available file descriptors and stop processing any new calls. Additionally, disk space can be exhausted as Asterisk logs failures to open new file descriptors.

tags | advisory, web, tcp
advisories | CVE-2011-1507
SHA-256 | 471ce01d238810bef4b672c13bed60968aa25283433c449bf7c0a05b6b29d2ae
AST-2008-009.txt
Posted Jun 5, 2008
Authored by Tzafrir Cohen | Site asterisk.org

Asterisk Project Security Advisory - The ooh323 channel driver provided in Asterisk Addons used a TCP connection to pass commands internally. The payload of these packets included addresses of memory which were to be freed after the command was processed. By sending arbitrary data to the listening TCP socket, one could cause an almost certain crash since the command handler would attempt to free invalid memory. This problem was made worse by the fact that the listening TCP socket was bound to whatever IP address was specified by the "bindaddr" option in ooh323.conf.

tags | advisory, arbitrary, tcp
advisories | CVE-2008-2543
SHA-256 | aac2cc0599489e9604748b85058afad532715726a0cde88e1b0bcb8f18309c24
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