You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
70 lines
2.2 KiB
70 lines
2.2 KiB
13 years ago
|
<?xml version="1.0" encoding="utf-8"?>
|
||
|
|
<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
|
||
|
|
|
||
|
|
<glsa id="200504-03">
|
||
|
|
<title>Dnsmasq: Poisoning and Denial of Service vulnerabilities</title>
|
||
|
|
<synopsis>
|
||
|
|
Dnsmasq is vulnerable to DNS cache poisoning attacks and a potential Denial
|
||
|
|
of Service from the local network.
|
||
|
|
</synopsis>
|
||
|
|
<product type="ebuild">Dnsmasq</product>
|
||
|
|
<announced>April 04, 2005</announced>
|
||
|
|
<revised>April 04, 2005: 01</revised>
|
||
|
|
<bug>86718</bug>
|
||
|
|
<access>remote</access>
|
||
|
|
<affected>
|
||
|
|
<package name="net-dns/dnsmasq" auto="yes" arch="*">
|
||
|
|
<unaffected range="ge">2.22</unaffected>
|
||
|
|
<vulnerable range="lt">2.22</vulnerable>
|
||
|
|
</package>
|
||
|
|
</affected>
|
||
|
|
<background>
|
||
|
|
<p>
|
||
|
|
Dnsmasq is a lightweight and easily-configurable DNS forwarder and
|
||
|
|
DHCP server.
|
||
|
|
</p>
|
||
|
|
</background>
|
||
|
|
<description>
|
||
|
|
<p>
|
||
|
|
Dnsmasq does not properly detect that DNS replies received do not
|
||
|
|
correspond to any DNS query that was sent. Rob Holland of the Gentoo
|
||
|
|
Linux Security Audit team also discovered two off-by-one buffer
|
||
|
|
overflows that could crash DHCP lease files parsing.
|
||
|
|
</p>
|
||
|
|
</description>
|
||
|
|
<impact type="low">
|
||
|
|
<p>
|
||
|
|
A remote attacker could send malicious answers to insert arbitrary
|
||
|
|
DNS data into the Dnsmasq cache. These attacks would in turn help an
|
||
|
|
attacker to perform man-in-the-middle and site impersonation attacks.
|
||
|
|
The buffer overflows might allow an attacker on the local network to
|
||
|
|
crash Dnsmasq upon restart.
|
||
|
|
</p>
|
||
|
|
</impact>
|
||
|
|
<workaround>
|
||
|
|
<p>
|
||
|
|
There is no known workaround at this time.
|
||
|
|
</p>
|
||
|
|
</workaround>
|
||
|
|
<resolution>
|
||
|
|
<p>
|
||
|
|
All Dnsmasq users should upgrade to the latest version:
|
||
|
|
</p>
|
||
|
|
<code>
|
||
|
|
# emerge --sync
|
||
|
|
# emerge --ask --oneshot --verbose ">=net-dns/dnsmasq-2.22"</code>
|
||
|
|
</resolution>
|
||
|
|
<references>
|
||
|
|
<uri link="http://www.thekelleys.org.uk/dnsmasq/CHANGELOG">Dnsmasq Changelog</uri>
|
||
|
|
</references>
|
||
|
|
<metadata tag="requester" timestamp="Mon, 28 Mar 2005 07:00:46 +0000">
|
||
|
|
jaervosz
|
||
|
|
</metadata>
|
||
|
|
<metadata tag="submitter" timestamp="Mon, 28 Mar 2005 13:54:22 +0000">
|
||
|
|
koon
|
||
|
|
</metadata>
|
||
|
|
<metadata tag="bugReady" timestamp="Mon, 4 Apr 2005 11:10:45 +0000">
|
||
|
|
koon
|
||
|
|
</metadata>
|
||
|
|
</glsa>
|