| <?xml version="1.0" encoding="utf-8"?> |
| <!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd"> |
| |
| <glsa id="200410-15"> |
| <title>Squid: Remote DoS vulnerability</title> |
| <synopsis> |
| Squid contains a vulnerability in the SNMP module which may lead to a |
| denial of service. |
| </synopsis> |
| <product type="ebuild">squid</product> |
| <announced>October 18, 2004</announced> |
| <revised>December 30, 2007: 03</revised> |
| <bug>67167</bug> |
| <access>remote</access> |
| <affected> |
| <package name="net-proxy/squid" auto="yes" arch="*"> |
| <unaffected range="ge">2.5.7</unaffected> |
| <vulnerable range="lt">2.5.7</vulnerable> |
| </package> |
| </affected> |
| <background> |
| <p> |
| Squid is a full-featured Web proxy cache designed to run on Unix |
| systems. It supports proxying and caching of HTTP, FTP, and other URLs, |
| as well as SSL support, cache hierarchies, transparent caching, access |
| control lists and many other features. |
| </p> |
| </background> |
| <description> |
| <p> |
| 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. |
| </p> |
| </description> |
| <impact type="normal"> |
| <p> |
| An attacker can repeatedly send these malicious UDP packets to the |
| Squid server, leading to a denial of service. |
| </p> |
| </impact> |
| <workaround> |
| <p> |
| Disable SNMP support or filter the port that has SNMP processing |
| (default is 3401) to allow only SNMP data from trusted hosts. |
| </p> |
| <p> |
| To disable SNMP support put the entry snmp_port 0 in the squid.conf |
| configuration file. |
| </p> |
| <p> |
| 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. |
| </p> |
| </workaround> |
| <resolution> |
| <p> |
| All Squid users should upgrade to the latest version: |
| </p> |
| <code> |
| # emerge sync |
| |
| # emerge -pv ">=net-proxy/squid-2.5.7" |
| # emerge ">=net-proxy/squid-2.5.7"</code> |
| </resolution> |
| <references> |
| <uri link="http://www.idefense.com/application/poi/display?id=152&type=vulnerabilities&flashstatus=true">iDEFENSE Advisory</uri> |
| <uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2004-0918">CVE-2004-0918</uri> |
| </references> |
| <metadata tag="requester" timestamp="Sun, 17 Oct 2004 17:38:48 +0000"> |
| koon |
| </metadata> |
| <metadata tag="bugReady" timestamp="Sun, 17 Oct 2004 17:38:55 +0000"> |
| koon |
| </metadata> |
| <metadata tag="submitter" timestamp="Sun, 17 Oct 2004 18:44:11 +0000"> |
| lewk |
| </metadata> |
| </glsa> |