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Sending the \"Async\" header with\n\t the \"Application\" header during an Originate action, allows\n\t authenticated manager users to execute shell commands. Only\n\t users with the \"system\" privilege should be able to do this.\nOn systems that have the Asterisk Manager Interface, Skinny, SIP\n\t over TCP, or the built in HTTP server enabled, it is possible for\n\t an attacker to open as many connections to asterisk as he wishes.\n\t This will cause Asterisk to run out of available file descriptors\n\t and stop processing any new calls. Additionally, disk space can\n\t be exhausted as Asterisk logs failures to open new file\n\t descriptors.\n\n", "modified": "2011-04-21T00:00:00", "published": "2011-04-21T00:00:00", "id": "3C7D565A-6C64-11E0-813A-6C626DD55A41", "href": "https://vuxml.freebsd.org/freebsd/3c7d565a-6c64-11e0-813a-6c626dd55a41.html", "title": "Asterisk -- multiple vulnerabilities", "type": "freebsd", "cvss": {"score": 5.0, "vector": "AV:NETWORK/AC:LOW/Au:NONE/C:NONE/I:NONE/A:PARTIAL/"}}], "openvas": [{"lastseen": "2018-10-08T12:48:36", "bulletinFamily": "scanner", "description": "The remote host is missing an update to the system\n as announced in the referenced advisory.", "modified": "2018-10-05T00:00:00", "published": "2011-05-12T00:00:00", "id": "OPENVAS:136141256231069591", "href": "http://plugins.openvas.org/nasl.php?oid=136141256231069591", "title": "FreeBSD Ports: asterisk14", "type": "openvas", "sourceData": "###############################################################################\n# OpenVAS Vulnerability Test\n# $Id: freebsd_asterisk141.nasl 11762 2018-10-05 10:54:12Z cfischer $\n#\n# Auto generated from VID 3c7d565a-6c64-11e0-813a-6c626dd55a41\n#\n# Authors:\n# Thomas Reinke <reinke@securityspace.com>\n#\n# Copyright:\n# Copyright (c) 2011 E-Soft Inc. http://www.securityspace.com\n# Text descriptions are largely excerpted from the referenced\n# advisories, and are Copyright (c) the respective author(s)\n#\n# This program is free software; you can redistribute it and/or modify\n# it under the terms of the GNU General Public License version 2,\n# as published by the Free Software Foundation\n#\n# This program is distributed in the hope that it will be useful,\n# but WITHOUT ANY WARRANTY; without even the implied warranty of\n# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 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This will cause Asterisk to run out of \r\n available file descriptors and stop processing any new calls. \r\n Additionally, disk space can be exhausted as Asterisk logs \r\n failures to open new file descriptors. \r\n\r\n Resolution Asterisk can now limit the number of unauthenticated \r\n connections to each vulnerable interface and can also limit the \r\n time unauthenticated clients will remain connected for some \r\n interfaces. This will prevent vulnerable interfaces from using \r\n up all available file descriptors. Care should be taken when \r\n setting the connection limits so that the combined total of \r\n allowed unauthenticated sessions from each service is not more \r\n than the file descriptor limit for the Asterisk process. The \r\n file descriptor limit can be checked (and set) using the \r\n "ulimit -n" command for the process' limit and the \r\n "/proc/sys/fs/file-max" file (on Linux) for the system's limit. \r\n \r\n It will still be possible for an attacker to deny service to \r\n each of the vulnerable services individually. To mitigate this \r\n risk, vulnerable services should be run behind a firewall that \r\n can detect and prevent DoS attacks. \r\n \r\n In addition to using a firewall to filter traffic, vulnerable \r\n systems can be protected by disabling the vulnerable services \r\n in their respective configuration files. \r\n\r\n Affected Versions\r\n Product Release Series \r\n Asterisk Open Source 1.4.x All versions \r\n Asterisk Open Source 1.6.1.x All versions \r\n Asterisk Open Source 1.6.2.x All versions \r\n Asterisk Open Source 1.8.x All versions \r\n Asterisk Business Edition C.x.x All versions \r\n\r\n Corrected In\r\n Product Release \r\n Asterisk Open Source 1.4.40.1, 1.6.1.25, 1.6.2.17.3, 1.8.3.3 \r\n Asterisk Business Edition C.3.6.4 \r\n\r\n Patches \r\n URL Branch \r\n http://downloads.asterisk.org/pub/security/AST-2011-005-1.4.diff 1.4 \r\n http://downloads.asterisk.org/pub/security/AST-2011-005-1.6.1.diff 1.6.1 \r\n http://downloads.asterisk.org/pub/security/AST-2011-005-1.6.2.diff 1.6.2 \r\n http://downloads.asterisk.org/pub/security/AST-2011-005-1.8.diff 1.8 \r\n\r\n Asterisk Project Security Advisories are posted at \r\n http://www.asterisk.org/security \r\n \r\n This document may be superseded by later versions; if so, the latest \r\n version will be posted at \r\n http://downloads.digium.com/pub/security/AST-2011-005.pdf and \r\n http://downloads.digium.com/pub/security/AST-2011-005.html \r\n\r\n Revision History\r\n Date Editor Revisions Made \r\n 04/21/11 Matthew Nicholson Initial version \r\n\r\n Asterisk Project Security Advisory - AST-2011-005\r\n Copyright (c) 2011 Digium, Inc. All Rights Reserved.\r\n Permission is hereby granted to distribute and publish this advisory in its\r\n original, unaltered form.", "modified": "2011-04-27T00:00:00", "published": "2011-04-27T00:00:00", "id": "SECURITYVULNS:DOC:26230", "href": "https://vulners.com/securityvulns/SECURITYVULNS:DOC:26230", "title": "AST-2011-005: File Descriptor Resource Exhaustion", "type": "securityvulns", "cvss": {"score": 5.0, "vector": "AV:NETWORK/AC:LOW/Au:NONE/C:NONE/I:NONE/A:PARTIAL/"}}], "nessus": [{"lastseen": "2019-02-21T01:14:47", "bulletinFamily": "scanner", "description": "The Asterisk Development Team reports :\n\nIt is possible for a user of the Asterisk Manager Interface to bypass a security check and execute shell commands when they should not have that ability. Sending the 'Async' header with the 'Application' header during an Originate action, allows authenticated manager users to execute shell commands. Only users with the 'system' privilege should be able to do this.\n\nOn 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. 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This release is available for immediate download at http://downloads.asterisk.org/pub/telephony/asterisk/\n\nThe release of Asterisk 1.6.2.18 resolves several issues reported by the community and would have not been possible without your participation. Thank you!\n\nThe following is a sample of the issues resolved in this release :\n\n - Only offer codecs both sides support for directmedia.\n (Closes issue #17403. Reported, patched by one47)\n\n - Resolution of several DTMF based attended transfer issues. (Closes issue #17999, #17096, #18395, #17273.\n Reported by iskatel, gelo, shihchuan, grecco. Patched by rmudgett) NOTE: Be sure to read the ChangeLog for more information about these changes.\n\n - Resolve deadlocks related to device states in chan_sip (Closes issue #18310. Reported, patched by one47.\n Patched by jpeeler)\n\n - Fix channel redirect out of MeetMe() and other issues with channel softhangup (Closes issue #18585. Reported by oej. Tested by oej, wedhorn, russellb. 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This release is available for immediate download at http://downloads.asterisk.org/pub/telephony/asterisk/\n\nThe release of Asterisk 1.6.2.18 resolves several issues reported by the community and would have not been possible without your participation. Thank you!\n\nThe following is a sample of the issues resolved in this release :\n\n - Only offer codecs both sides support for directmedia.\n (Closes issue #17403. Reported, patched by one47)\n\n - Resolution of several DTMF based attended transfer issues. (Closes issue #17999, #17096, #18395, #17273.\n Reported by iskatel, gelo, shihchuan, grecco. Patched by rmudgett) NOTE: Be sure to read the ChangeLog for more information about these changes.\n\n - Resolve deadlocks related to device states in chan_sip (Closes issue #18310. Reported, patched by one47.\n Patched by jpeeler)\n\n - Fix channel redirect out of MeetMe() and other issues with channel softhangup (Closes issue #18585. Reported by oej. Tested by oej, wedhorn, russellb. 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