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Files from Richard Mudgett

Email addressrmudgett at
First Active2012-05-29
Last Active2018-09-20
Asterisk Project Security Advisory - AST-2018-009
Posted Sep 20, 2018
Authored by Richard Mudgett | Site

Asterisk Project Security Advisory - There is a stack overflow vulnerability in the module of Asterisk that allows an attacker to crash Asterisk via a specially crafted HTTP request to upgrade the connection to a websocket. The attacker's request causes Asterisk to run out of stack space and crash.

tags | advisory, web, overflow
advisories | CVE-2018-17281
MD5 | d360009b6ebce2781197851a171aa0fc
Asterisk Project Security Advisory - AST-2018-008
Posted Jun 11, 2018
Authored by Richard Mudgett | Site

Asterisk Project Security Advisory - When endpoint specific ACL rules block a SIP request they respond with a 403 forbidden. However, if an endpoint is not identified then a 401 unauthorized response is sent. This vulnerability just discloses which requests hit a defined endpoint. The ACL rules cannot be bypassed to gain access to the disclosed endpoints.

tags | advisory
MD5 | 0d32ecb64f2f13ae1afa46c553ade032
Asterisk Project Security Advisory - AST-2017-010
Posted Nov 8, 2017
Authored by Richard Mudgett | Site

Asterisk Project Security Advisory - No size checking is done when setting the user field for Party B on a CDR. Thus, it is possible for someone to use an arbitrarily large string and write past the end of the user field storage buffer.

tags | advisory
MD5 | 99d49f850dc9f53321ce7037e0c868b0
Asterisk Project Security Advisory - AST-2017-006
Posted Aug 31, 2017
Authored by Richard Mudgett, Corey Farrell | Site

Asterisk Project Security Advisory - The app_minivm module has an externnotify program configuration option that is executed by the MinivmNotify dialplan application. The application uses the caller-id name and number as part of a built string passed to the OS shell for interpretation and execution. Since the caller-id name and number can come from an untrusted source, a crafted caller-id name or number allows an arbitrary shell command injection.

tags | advisory, arbitrary, shell
MD5 | 748567bf154dce3a594d7969b1e1b697
Asterisk Project Security Advisory - AST-2016-003
Posted Feb 6, 2016
Authored by Richard Mudgett, Walter Dokes, Torrey Searle | Site

Asterisk Project Security Advisory - If no UDPTL packets are lost there is no problem. However, a lost packet causes Asterisk to use the available error correcting redundancy packets. If those redundancy packets have zero length then Asterisk uses an uninitialized buffer pointer and length value which can cause invalid memory accesses later when the packet is copied.

tags | advisory
MD5 | 35c17d57906a2a400e39bb6fbd40e4b1
Asterisk Project Security Advisory - AST-2016-002
Posted Feb 6, 2016
Authored by Richard Mudgett, Alexander Traud | Site

Asterisk Project Security Advisory - Setting the sip.conf timert1 value to a value higher than 1245 can cause an integer overflow and result in large retransmit timeout times. These large timeout values hold system file descriptors hostage and can cause the system to run out of file descriptors.

tags | advisory, overflow
MD5 | 5042769cb92f966de13e32154bee662e
Asterisk Project Security Advisory - AST-2014-007
Posted Jun 13, 2014
Authored by Richard Mudgett | Site

Asterisk Project Security Advisory - Establishing a TCP or TLS connection to the configured HTTP or HTTPS port respectively in http.conf and then not sending or completing a HTTP request will tie up a HTTP session. By doing this repeatedly until the maximum number of open HTTP sessions is reached, legitimate requests are blocked.

tags | advisory, web, tcp
advisories | CVE-2014-4047
MD5 | f6bc42691087326bc220a4aa850a8c2e
Asterisk Project Security Advisory - AST-2014-001
Posted Mar 11, 2014
Authored by Richard Mudgett, Lucas Molas, Dr. Manuel Sadosky | Site

Asterisk Project Security Advisory - Sending a HTTP request that is handled by Asterisk with a large number of Cookie headers could overflow the stack. You could even exhaust memory if you sent an unlimited number of headers in the request.

tags | advisory, web, overflow
advisories | CVE-2014-2286
MD5 | e6bbe4e2d49a4866b570f2440dae92de
Asterisk Project Security Advisory - AST-2012-007
Posted May 29, 2012
Authored by Richard Mudgett | Site

Asterisk Project Security Advisory - A remotely exploitable crash vulnerability exists in the IAX2 channel driver if an established call is placed on hold without a suggested music class.

tags | advisory
advisories | CVE-2012-2947
MD5 | b42ab63005025daa63e9cb6fd1a5db15
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