Vulnerability Assessment & Network Security Forums
If through a vulnerability assessment, a network security issue is detected for the vulnerability below, applying the appropriate security patches in a timely matter is very important. If you have detected that your system has already been compromised, following CERT's Network Security recovery document will assist with recommended steps for system recovery.
Vulnerability Assessment Details
Squid: Remote DoS vulnerability
Detailed Explanation for this Vulnerability Assessment
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.
A possible hacker can repeatedly send these malicious UDP packets to the Squid
server, leading to a denial of service.
Disable SNMP support or filter the port that has SNMP processing (default
is 3401) to permit only SNMP data from trusted hosts.
To disable SNMP support put the entry snmp_port 0 in the squid.conf
To permit only the local interface to process SNMP, add the entry
"snmp_incoming_address 127.0.0.1" in the squid.conf configuration file.
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"
Network Security Threat Level: Medium
Networks Security ID:
Vulnerability Assessment Copyright: (C) 2005 Michel Arboi
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