GLSA 200808-02: Net-SNMP: Multiple vulnerabilities
| Severity: | normal |
| Title: | Net-SNMP: Multiple vulnerabilities |
| Date: | 08/06/2008 |
| Bugs: | , |
| ID: | 200808-02 |
Synopsis
Multiple vulnerabilities in Net-SNMP allow for authentication bypass in snmpd and execution of arbitrary code in Perl applications using Net-SMNP.Background
Net-SNMP is a collection of tools for generating and retrieving SNMP data. The SNMPv3 protocol uses a keyed-Hash Message Authentication Code (HMAC) to verify data integrity and authenticity of SNMP messages.
Affected packages
| Package | Vulnerable | Unaffected | Architecture(s) |
|---|---|---|---|
| net-analyzer/net-snmp | < 5.4.1.1 | >= 5.4.1.1 | All supported architectures |
Description
Wes Hardaker reported that the SNMPv3 HMAC verification relies on the client to specify the HMAC length (CVE-2008-0960). John Kortink reported a buffer overflow in the Perl bindings of Net-SNMP when processing the OCTETSTRING in an attribute value pair (AVP) received by an SNMP agent (CVE-2008-2292).
Impact
An attacker could send SNMPv3 packets to an instance of snmpd providing a valid user name and an HMAC length value of 1, and easily conduct brute-force attacks to bypass SNMP authentication. An attacker could further entice a user to connect to a malicious SNMP agent with an SNMP client using the Perl bindings, possibly resulting in the execution of arbitrary code.
Workaround
There is no known workaround at this time.
Resolution
All Net-SNMP users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=net-analyzer/net-snmp-5.4.1.1"
References
Availability
This GLSA and any updates to it are available for viewing at the Gentoo Security Website:
Concerns?
Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.
License
Copyright 2010 Gentoo Foundation, Inc; referenced text belongs to its owner(s). The contents of this document are licensed under the Creative Commons - Attribution / Share Alike license.