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<?xml version="1.0" encoding="utf-8"?>
<?xml-stylesheet href="/xsl/glsa.xsl" type="text/xsl"?>
<?xml-stylesheet href="/xsl/guide.xsl" type="text/xsl"?>
<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
<glsa id="200610-06">
<title>Mozilla Network Security Service (NSS): RSA signature forgery</title>
<synopsis>
NSS fails to properly validate PKCS #1 v1.5 signatures.
</synopsis>
<product type="ebuild">nss</product>
<announced>October 17, 2006</announced>
<revised>October 17, 2006: 01</revised>
<bug>148283</bug>
<access>remote</access>
<affected>
<package name="dev-libs/nss" auto="yes" arch="*">
<unaffected range="ge">3.11.3</unaffected>
<vulnerable range="lt">3.11.3</vulnerable>
</package>
</affected>
<background>
<p>
The Mozilla Network Security Service is a library implementing security
features like SSL v.2/v.3, TLS, PKCS #5, PKCS #7, PKCS #11, PKCS #12,
S/MIME and X.509 certificates.
</p>
</background>
<description>
<p>
Daniel Bleichenbacher discovered that it might be possible to forge
signatures signed by RSA keys with the exponent of 3. This affects a
number of RSA signature implementations, including Mozilla's NSS.
</p>
</description>
<impact type="normal">
<p>
Since several Certificate Authorities (CAs) are using an exponent of 3
it might be possible for an attacker to create a key with a false CA
signature. This impacts any software using the NSS library, like the
Mozilla products Firefox, Thunderbird and Seamonkey.
</p>
</impact>
<workaround>
<p>
There is no known workaround at this time.
</p>
</workaround>
<resolution>
<p>
All NSS users should upgrade to the latest version:
</p>
<code>
# emerge --sync
# emerge --ask --oneshot --verbose ">=dev-libs/nss-3.11.3"</code>
<p>
Note: As usual after updating a library, you should run
'revdep-rebuild' (from the app-portage/gentoolkit package) to ensure
that all applications linked to it are properly rebuilt.
</p>
</resolution>
<references>
<uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-4339">CVE-2006-4339</uri>
<uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-4340">CVE-2006-4340</uri>
</references>
<metadata tag="requester" timestamp="Mon, 25 Sep 2006 12:57:17 +0000">
frilled
</metadata>
<metadata tag="bugReady" timestamp="Tue, 03 Oct 2006 18:27:05 +0000">
vorlon078
</metadata>
<metadata tag="submitter" timestamp="Sun, 08 Oct 2006 19:45:16 +0000">
frilled
</metadata>
</glsa>
|
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