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Gentoo Linux Security Advisory GLSA 200905-01 |
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http://security.gentoo.org/ |
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|
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Severity: Normal |
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Title: Asterisk: Multiple vulnerabilities |
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Date: May 02, 2009 |
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Bugs: #218966, #224835, #232696, #232698, #237476, #250748, |
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#254304 |
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ID: 200905-01 |
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|
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Synopsis |
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======== |
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|
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Multiple vulnerabilities have been found in Asterisk allowing for |
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Denial of Service and username disclosure. |
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|
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Background |
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========== |
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|
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Asterisk is an open source telephony engine and toolkit. |
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|
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Affected packages |
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================= |
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|
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------------------------------------------------------------------- |
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Package / Vulnerable / Unaffected |
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------------------------------------------------------------------- |
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1 net-misc/asterisk < 1.2.32 >= 1.2.32 |
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|
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Description |
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=========== |
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|
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Multiple vulnerabilities have been discovered in the IAX2 channel |
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driver when performing the 3-way handshake (CVE-2008-1897), when |
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handling a large number of POKE requests (CVE-2008-3263), when handling |
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authentication attempts (CVE-2008-5558) and when handling firmware |
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download (FWDOWNL) requests (CVE-2008-3264). Asterisk does also not |
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correctly handle SIP INVITE messages that lack a "From" header |
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(CVE-2008-2119), and responds differently to a failed login attempt |
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depending on whether the user account exists (CVE-2008-3903, |
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CVE-2009-0041). |
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|
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Impact |
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====== |
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|
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Remote unauthenticated attackers could send specially crafted data to |
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Asterisk, possibly resulting in a Denial of Service via a daemon crash, |
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call-number exhaustion, CPU or traffic consumption. Remote |
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unauthenticated attackers could furthermore enumerate valid usernames |
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to facilitate brute force login attempts. |
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|
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Workaround |
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========== |
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|
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There is no known workaround at this time. |
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|
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Resolution |
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========== |
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All Asterisk users should upgrade to the latest version: |
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|
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# emerge --sync |
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# emerge --ask --oneshot --verbose ">=net-misc/asterisk-1.2.32" |
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|
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References |
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========== |
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|
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[ 1 ] CVE-2008-1897 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1897 |
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[ 2 ] CVE-2008-2119 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-2119 |
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[ 3 ] CVE-2008-3263 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-3263 |
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[ 4 ] CVE-2008-3264 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-3264 |
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[ 5 ] CVE-2008-3903 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-3903 |
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[ 6 ] CVE-2008-5558 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-5558 |
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[ 7 ] CVE-2009-0041 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-0041 |
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|
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Availability |
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============ |
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|
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This GLSA and any updates to it are available for viewing at |
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the Gentoo Security Website: |
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http://security.gentoo.org/glsa/glsa-200905-01.xml |
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|
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Concerns? |
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========= |
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Security is a primary focus of Gentoo Linux and ensuring the |
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confidentiality and security of our users machines is of utmost |
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importance to us. Any security concerns should be addressed to |
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security@g.o or alternatively, you may file a bug at |
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http://bugs.gentoo.org. |
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|
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License |
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======= |
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Copyright 2009 Gentoo Foundation, Inc; referenced text |
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belongs to its owner(s). |
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|
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The contents of this document are licensed under the |
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Creative Commons - Attribution / Share Alike license. |
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|
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http://creativecommons.org/licenses/by-sa/2.5 |