AST-2016-008: http://downloads.asterisk.org/pub/security/AST-2016-008.html Asterisk Project Security Advisory - AST-2016-008 Product Asterisk Summary Crash on SDP offer or answer from endpoint using Opus Nature of Advisory Remote Crash Susceptibility Remote unauthenticated sessions Severity Critical Exploits Known No Reported On November 11, 2016 Reported By jorgen Posted On Last Updated On November 15, 2016 Advisory Contact jcolp AT digium DOT com CVE Name Description If an SDP offer or answer is received with the Opus codec and with the format parameters separated using a space the code responsible for parsing will recursively call itself until it crashes. This occurs as the code does not properly handle spaces separating the parameters. This does NOT require the endpoint to have Opus configured in Asterisk. This also does not require the endpoint to be authenticated. If guest is enabled for chan_sip or anonymous in chan_pjsip an SDP offer or answer is still processed and the crash occurs. Resolution The code has been updated to properly handle spaces separating parameters in the fmtp line. Upgrade to a released version with the fix incorporated or apply patch. Affected Versions Product Release Series Asterisk Open Source 13.x 13.12.0 and higher Asterisk Open Source 14.x All Versions Corrected In Product Release Asterisk Open Source 13.13.1, 14.2.1 Patches SVN URL Revision http://downloads.asterisk.org/pub/security/AST-2016-008-13.diff Asterisk 13 http://downloads.asterisk.org/pub/security/AST-2016-008-14.diff Asterisk 14 Links https://issues.asterisk.org/jira/browse/ASTERISK-26579 Asterisk Project Security Advisories are posted at http://www.asterisk.org/security This document may be superseded by later versions; if so, the latest version will be posted at http://downloads.digium.com/pub/security/AST-2016-008.pdf and http://downloads.digium.com/pub/security/AST-2016-008.html Revision History Date Editor Revisions Made November 15, 2016 Joshua Colp Initial draft of Advisory ASTERISK-2016-009: http://downloads.asterisk.org/pub/security/AST-2016-009.html Asterisk Project Security Advisory - ASTERISK-2016-009 Product Asterisk Summary Nature of Advisory Authentication Bypass Susceptibility Remote unauthenticated sessions Severity Minor Exploits Known No Reported On October 3, 2016 Reported By Walter Doekes Posted On Last Updated On December 8, 2016 Advisory Contact Mmichelson AT digium DOT com CVE Name Description The chan_sip channel driver has a liberal definition for whitespace when attempting to strip the content between a SIP header name and a colon character. Rather than following RFC 3261 and stripping only spaces and horizontal tabs, Asterisk treats any non-printable ASCII character as if it were whitespace. This means that headers such as Contact\x01: will be seen as a valid Contact header. This mostly does not pose a problem until Asterisk is placed in tandem with an authenticating SIP proxy. In such a case, a crafty combination of valid and invalid To headers can cause a proxy to allow an INVITE request into Asterisk without authentication since it believes the request is an in-dialog request. However, because of the bug described above, the request will look like an out-of-dialog request to Asterisk. Asterisk will then process the request as a new call. The result is that Asterisk can process calls from unvetted sources without any authentication. If you do not use a proxy for authentication, then this issue does not affect you. If your proxy is dialog-aware (meaning that the proxy keeps track of what dialogs are currently valid), then this issue does not affect you. If you use chan_pjsip instead of chan_sip, then this issue does not affect you. Resolution chan_sip has been patched to only treat spaces and horizontal tabs as whitespace following a header name. This allows for Asterisk and authenticating proxies to view requests the same way Affected Versions Product Release Series Asterisk Open Source 11.x All Releases Asterisk Open Source 13.x All Releases Asterisk Open Source 14.x All Releases Certified Asterisk 13.8 All Releases Corrected In Product Release Asterisk Open Source 11.25.1, 13.13.1, 14.2.1 Certified Asterisk 11.6-cert16, 13.8-cert4 Patches SVN URL Revision Links Asterisk Project Security Advisories are posted at http://www.asterisk.org/security This document may be superseded by later versions; if so, the latest version will be posted at http://downloads.digium.com/pub/security/ASTERISK-2016-009.pdf and http://downloads.digium.com/pub/security/ASTERISK-2016-009.html Revision History Date Editor Revisions Made November 28, 2016 Mark Michelson Initial writeup
@ Maintainer(s): Please bump to >=net-misc/asterisk-11.25.1 and >=net-misc/asterisk-13.13.1. After the bump please tell us which version can be stabilized (or start the stabilization itself).
Arches, please test & mark stable: =net-misc/asterisk-11.25.1 Security, once stabilisation is complete you are clear to delete: =net-misc/asterisk-11.21.1-r1 The 13 branch has no stable ebuilds; all vulnerable non-stable ebuilds removed from tree.
amd64 stable
x86 stable. Maintainer(s), please cleanup. Security, please vote.
GLSA Vote: No
https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=3748bbf31bfd861a795fb626e678de5c93f83434
