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Family: Gentoo Local Security Checks --> Category: infos
[GLSA-200410-15] Squid: Remote DoS vulnerability Vulnerability Scan
Vulnerability Scan Summary
Squid: Remote DoS vulnerability
Detailed Explanation for this Vulnerability Test
The remote host is affected by the vulnerability described in GLSA-200410-15
(Squid: Remote DoS vulnerability)
A parsing error exists in the SNMP module of Squid where a
specially-crafted UDP packet can potentially cause the server to restart,
closing all current connections. This vulnerability only exists in versions
of Squid compiled with the 'snmp' USE flag.
Impact
A possible hacker can repeatedly send these malicious UDP packets to the Squid
server, leading to a denial of service.
Workaround
Disable SNMP support or filter the port that has SNMP processing (default
is 3401) to allow only SNMP data from trusted hosts.
To disable SNMP support put the entry snmp_port 0 in the squid.conf
configuration file.
To allow only the local interface to process SNMP, add the entry
"snmp_incoming_address 127.0.0.1" in the squid.conf configuration file.
References:
http://www.idefense.com/application/poi/display?id=152&type=vulnerabilities&flashstatus=true
Solution:
All Squid users should upgrade to the latest version:
# emerge sync
# emerge -pv ">=www-proxy/squid-2.5.7"
# emerge ">=www-proxy/squid-2.5.7"
Threat Level: Medium
Click HERE for more information and discussions on this network vulnerability scan.
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