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Gentoo Linux Security Advisory GLSA 200808-02 |
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http://security.gentoo.org/ |
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Severity: Normal |
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Title: Net-SNMP: Multiple vulnerabilities |
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Date: August 06, 2008 |
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Bugs: #222265, #225105 |
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ID: 200808-02 |
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Synopsis |
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======== |
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|
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Multiple vulnerabilities in Net-SNMP allow for authentication bypass in |
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snmpd and execution of arbitrary code in Perl applications using |
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Net-SMNP. |
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|
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Background |
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========== |
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|
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Net-SNMP is a collection of tools for generating and retrieving SNMP |
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data. The SNMPv3 protocol uses a keyed-Hash Message Authentication Code |
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(HMAC) to verify data integrity and authenticity of SNMP messages. |
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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-analyzer/net-snmp < 5.4.1.1 >= 5.4.1.1 |
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|
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Description |
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=========== |
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|
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Wes Hardaker reported that the SNMPv3 HMAC verification relies on the |
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client to specify the HMAC length (CVE-2008-0960). John Kortink |
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reported a buffer overflow in the Perl bindings of Net-SNMP when |
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processing the OCTETSTRING in an attribute value pair (AVP) received by |
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an SNMP agent (CVE-2008-2292). |
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|
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Impact |
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====== |
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|
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An attacker could send SNMPv3 packets to an instance of snmpd providing |
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a valid user name and an HMAC length value of 1, and easily conduct |
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brute-force attacks to bypass SNMP authentication. An attacker could |
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further entice a user to connect to a malicious SNMP agent with an SNMP |
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client using the Perl bindings, possibly resulting in the execution of |
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arbitrary code. |
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|
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Workaround |
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========== |
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There is no known workaround at this time. |
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Resolution |
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========== |
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All Net-SNMP users should upgrade to the latest version: |
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# emerge --sync |
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# emerge --ask --oneshot --verbose ">=net-analyzer/net-snmp-5.4.1.1" |
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|
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References |
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========== |
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|
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[ 1 ] CVE-2008-0960 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-0960 |
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[ 2 ] CVE-2008-2292 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-2292 |
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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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|
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http://security.gentoo.org/glsa/glsa-200808-02.xml |
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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 2008 Gentoo Foundation, Inc; referenced text |
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belongs to its owner(s). |
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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 |
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