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Home >> Browse Vulnerability Assessment Database >> Gentoo Local Security Checks >> [GLSA-200410-15] Squid: Remote DoS vulnerability


Vulnerability Assessment Details

[GLSA-200410-15] Squid: Remote DoS vulnerability

Vulnerability Assessment Summary
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.

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 permit only SNMP data from trusted hosts.
To disable SNMP support put the entry snmp_port 0 in the squid.conf
configuration file.
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.

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"


Network Security Threat Level: Medium


Networks Security ID:

Vulnerability Assessment Copyright: (C) 2005 Michel Arboi

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