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<h1>The GnuTLS Transport Layer Security Library</h1>
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<li><a name="about"><b>About Security Advisories</b></a>
<p>Although, the core GnuTLS team does not have resources to
analyse the background and impact of security issues in depth,
we do take security seriously. All known information on security incidents
is collected and published in this page.
<p>Our idea is to turn writing security advisory into an open
process where everyone can contribute. Everyone is invited to
analyse the impact of discovered bugs, and, of course, also to
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<h2>Advisories</h2></p>
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<table class="news" width="90%" summary="">
<tr><th>Tag</th><th>Other identifiers</th><th>Severity</th><th>Information</th>
<tr>
<td><div class="emph-box" id="GNUTLS-SA-2016-1">GNUTLS-SA-2016-1</div></td>
<td><a href="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-4456">CVE-2016-4456</a></td>
<td>File overwrite by setuid programs</td>
<td>Setuid programs using GnuTLS 3.4.12 could potentially allow an attacker to overwrite
and corrupt arbitrary files in the filesystem. This issue was introduced in GnuTLS 3.4.12
with the GNUTLS_KEYLOGFILE environment variable handling via getenv() and fixed
in GnuTLS 3.4.13 by switching to secure_getenv() where available.
<b>Recommendation:</b> Upgrade to GnuTLS 3.4.13, or later versions.</td>
</tr>
<tr>
<td><div class="emph-box" id="GNUTLS-SA-2015-4">GNUTLS-SA-2015-4</div></td>
<td><a href="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-3308">
CVE-2015-3308</a></td>
<td>Double free in CRL distribution points decoding of a certificate</td>
<td>Robert Święcki reported that decoding a specially crafted
certificate with certain CRL distribution points format can lead to a
double free. This issue was fixed in GnuTLS 3.3.14.
<b>Recommendation:</b> Upgrade to GnuTLS 3.3.14, or later versions.</td>
</tr>
<tr>
<td><div class="emph-box" id="GNUTLS-SA-2015-3">GNUTLS-SA-2015-3</div></td>
<td><a href="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-6251">
CVE-2015-6251</a></td>
<td>Double free in certificate DN decoding</td>
<td>Kurt Roeckx reported that decoding a specific certificate with very
long DistinguishedName (DN) entries leads to double free, which may result to a denial of
service. Since the DN decoding occurs in almost all applications using
certificates it is recommended to upgrade the latest GnuTLS version
fixing the issue.<br />
<b>Recommendation:</b> Upgrade to GnuTLS 3.4.4, or 3.3.17.</td>
</tr>
<tr>
<td><div class="emph-box" id="GNUTLS-SA-2015-2">GNUTLS-SA-2015-2</div></td>
<td><a href="http://seclists.org/oss-sec/2015/q3/374">
No CVE assigned</a>
</td>
<td>ServerKeyExchange signature issue</td>
<td><a
href="http://permalink.gmane.org/gmane.comp.encryption.gpg.gnutls.devel/8132">Karthikeyan Bhargavan
reported</a> that a ServerKeyExchange signature
sent by the server is not verified to be in the acceptable by the client
set of algorithms. That has the effect of allowing MD5 signatures
(which are disabled by default) in the ServerKeyExchange message. It is not believed that this bug can
be exploited because a fraudulent signature has to be generated in real-time which is not
known to be possible. However, since attacks can only get better it is
recommended to update to a GnuTLS version which addresses the issue.<br>
<b>Recommendation:</b> Upgrade to GnuTLS 3.4.1, or 3.3.15.</td>
</tr>
<tr>
<td><div class="emph-box" id="GNUTLS-SA-2015-1">GNUTLS-SA-2015-1</div></td>
<td><a href="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-0282">
CVE-2015-0282</a>
</td>
<td>Signature forgery</td>
<td>This issue only affects versions of GnuTLS prior to 3.1.0 (released in 2012).
These versions don't verify the RSA PKCS #1 signature algorithm to
match the signature algorithm in the certificate, leading to a potential
downgrade to a disallowed algorithm, such as MD5, without detecting it.<br>
<b>Recommendation:</b> Upgrade to GnuTLS 3.1.0, or later.
A patch will be included in gnutls_2_12_x branch for the users of that
version that cannot upgrade.</td>
</tr>
<tr>
<td><div class="emph-box" id="GNUTLS-SA-2014-5">GNUTLS-SA-2014-5</div></td>
<td><a href="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-8564">
CVE-2014-8564</a>
</td>
<td>Denial of service</td>
<td>Sean Burford reported that the encoding of elliptic curves parameters
GnuTLS 3 is vulnerable to a denial of service (heap
corruption). It affects clients and servers which print information about
the peer's public key, e.g., the key ID, and can be exploited via
a specially crafted X.509 certificate.<br>
<b>Recommendation:</b> Upgrade to GnuTLS 3.3.10, 3.2.20 or 3.1.28.</td>
</tr>
<tr>
<td><div class="emph-box" id="GNUTLS-SA-2014-4">GNUTLS-SA-2014-4</div></td>
<td><a href="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-3566">
CVE-2014-3566</a>
</td>
<td>Possible plaintext recovery</td>
<td>This is a vulnerability on the SSL 3.0 protocol (called POODLE), which can be
exploited when TLS clients use a non-standard insecure protocol
negotiation (it affects mostly browsers). Clients performing the
standard TLS handshake as documented by GnuTLS are not affected.<br>
<a href="http://nmav.gnutls.org/2014/10/what-about-poodle.html">
Write-up by Nikos</a><br>
<b>Recommendation:</b> For clients using the documented
handshake process no action is required. Clients that use the non-standard insecure
negotiation should not negotiate SSL 3.0. In all cases it recommended
to disable SSL 3.0 using a priority string such as "NORMAL:-VERS-SSL3.0".</td>
</tr>
<tr>
<td><div class="emph-box" id="GNUTLS-SA-2014-3">GNUTLS-SA-2014-3</div></td>
<td><a href="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-3466">
CVE-2014-3466</a>
</td>
<td>Memory corruption</td>
<td>This vulnerability affects the client side of the gnutls library. A server that
sends a specially crafted ServerHello could corrupt the memory of a requesting client.<br>
<a href="http://radare.today/technical-analysis-of-the-gnutls-hello-vulnerability/">
Analysis at radare.today</a><br>
<b>Recommendation:</b> Upgrade to the latest gnutls version (3.1.25, 3.2.15
or 3.3.4)</td>
</tr>
<tr>
<td><div class="emph-box" id="GNUTLS-SA-2014-2">GNUTLS-SA-2014-2</div></td>
<td><a href="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-0092">
CVE-2014-0092</a>
</td>
<td>Certificate verification issue</td>
<td><p>A vulnerability was discovered that affects the certificate verification
functions of all gnutls versions. A specially crafted certificate could
bypass certificate validation checks. The vulnerability was discovered
during an audit of GnuTLS for Red Hat.
</p>
<p>
<b>Who is affected by this attack?</b>
<ul>
<li>Anyone using certificate authentication in any version of GnuTLS.</li>
</ul>
</p><p>
<b>How are past sessions affected?</b>
<ul>
<li>The vulnerability to be exploited it requires an active man-in-the-middle attacker.
Past sessions are not affected unless they were under such an attack.</li>
</ul>
</p><p>
<b>How to mitigate the attack?</b>
<ul>
<li>Upgrade to the latest GnuTLS version (<a href="http://article.gmane.org/gmane.comp.encryption.gpg.gnutls.devel/7341">3.2.12</a> or 3.1.22), or
apply the patch for <a href="https://www.gitorious.org/gnutls/gnutls/commit/6aa26f78150ccbdf0aec1878a41c17c41d358a3b">GnuTLS 2.12.x</a>.
</li>
</ul>
</p>
</tr>
<tr>
<td><div class="emph-box" id="GNUTLS-SA-2014-1">GNUTLS-SA-2014-1</div></td>
<td><a href="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-1959">
CVE-2014-1959</a>
</td>
<td>Certificate verification issue</td>
<td><p>Suman Jana reported a vulnerability that affects the certificate verification
functions of gnutls 2.11.5 and later versions. A version 1 intermediate certificate will be considered as
a CA certificate by default (something that deviates from the documented
behavior).
</p>
<p>
<b>Who is affected by this attack?</b>
<ul>
<li>Anyone who has a CA that issues X.509 version 1 certificates in his
trusted list.</li>
</ul>
</p><p>
<b>How to mitigate the attack?</b>
<ul>
<li>Apply <a
href="https://www.gitorious.org/gnutls/gnutls/commit/b1abfe3d182d68539900092eb42fc62cf1bb7e7c">this
patch</a> or upgrade to the latest GnuTLS version (3.2.11 or 3.1.21).</li>
</ul>
</p>
</tr>
<tr>
<td><div class="emph-box" id="GNUTLS-SA-2013-3">GNUTLS-SA-2013-3</div></td>
<td><a href="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-4466">
CVE-2013-4466</a>
</td>
<td>Denial of service</td>
<td>This vulnerability affects the DANE library of gnutls 3.1.x and gnutls 3.2.x. A server that
returns more 4 DANE entries could corrupt the memory of a requesting client.<br>
<b>Recommendation:</b> Upgrade to the latest gnutls version (3.1.16 or 3.2.6)</td>
</tr>
<tr>
<td><div class="emph-box" id="GNUTLS-SA-2013-2">GNUTLS-SA-2013-2</div></td>
<td>
<a href="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-2116">
CVE-2013-2116</a>
</td>
<td>Denial of service</td>
<td>This vulnerability affects gnutls 2.12.23 and its TLS record decoding.<br>
<b>Recommendation:</b> Apply <a href="http://article.gmane.org/gmane.comp.encryption.gpg.gnutls.devel/6754">the patch</a> or upgrade to gnutls 3.x.</td>
</tr>
<tr>
<td><div class="emph-box" id="GNUTLS-SA-2013-1">GNUTLS-SA-2013-1</div></td>
<td>
<a href="http://www.isg.rhul.ac.uk/tls/">
TLS CBC padding timing attack</a><br>
<a href="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-1619">
CVE-2013-1619</a>
</td>
<td>Possible plaintext recovery</td>
<td><p>
Nadhem Alfardan and Kenny Paterson devised an attack that recovers
some bits of the plaintext of a GnuTLS session that utilizes that CBC
ciphersuites, by using timing information.
</p>
<p>
In order for the attack to work the client must operate as follows.
It connects to a server, it sends some (encrypted) data that will be
intercepted by the attacker, who will terminate the client's connection
abnormally (i.e. the client will receive a premature termination error).
The client should repeat that, multiple times.
</p>
<p>
<b>Who is affected by this attack?</b>
<ul>
<li>Clients that repeatedly reconnect and transfer the same data, after
a TLS fatal error occurs.</li>
</ul>
</p><p>
<b>How to mitigate the attack?</b>
<ul>
<li>Do not enable the CBC ciphersuites, prefer ARCFOUR or GCM modes.</li>
<li>Upgrade to the latest GnuTLS version (3.1.7, 3.0.28, or 2.12.23).</li>
</ul>
<a href="http://nikmav.blogspot.be/2013/02/time-is-money-for-cbc-ciphersuites.html">Write-up by Nikos</a><br>
</p>
</td>
</tr>
<tr>
<td><div class="emph-box" id="GNUTLS-SA-2012-4">GNUTLS-SA-2012-4</div></td>
<td>
<a href="http://security.blogoverflow.com/2012/09/how-can-you-protect-yourself-from-crime-beasts-successor/">
"CRIME" attack</a><br>
<a href="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-4929">
CVE-2012-4929</a>
</td>
<td>Possible plaintext recovery</td>
<td><p>There is an attack on TLS called "CRIME" which
takes advantage of compression and may recover plaintext under certain
circumstances.</p>
<p>
<b>Who is affected by this attack?</b>
<ul>
<li>Clients or servers that use compression and provide the ability to
an adversary to inject data (multiple times) in their session.</li>
</ul>
</p><p>
<b>How to mitigate the attack?</b>
<ul>
<li>Do not enable compression (GnuTLS doesn't enable it by default)</li>
<li>When using compression use the CBC ciphers that include a random
padding up to 255 bytes. That would increase the number of trials an
attacker needs to perform significantly.</li>
</ul>
</p>
Note that using compression provides <a href="https://www.cosic.esat.kuleuven.be/ecrypt/provpriv2012/abstracts/barghavan.pdf">information to an attacker</a> on the plaintext.
<br>
<a href="http://article.gmane.org/gmane.comp.encryption.gpg.gnutls.devel/6304">Security advisory</a>
<br>
<a href="http://security.blogoverflow.com/2012/09/how-can-you-protect-yourself-from-crime-beasts-successor/">A description of the attack</a>
<br>
<a href="http://bridge.grumpy-troll.org/2012/09/tls-crime-beast-and-you-programmer.html">Another analysis of the attack</a>
<br>
</td>
</tr>
<tr>
<td><div class="emph-box" id="GNUTLS-SA-2012-3">GNUTLS-SA-2012-3</div></td>
<td>
<a href="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-1569">
CVE-2012-1569</a>
</td>
<td>Denial of service</td>
<td>This vulnerability is in the libtasn1 library and affects the DER length decoding which is fixed in <a href="http://lists.gnu.org/archive/html/help-libtasn1/2012-03/msg00000.html">2.12 release</a>.<br>
<a href="http://article.gmane.org/gmane.comp.encryption.gpg.gnutls.devel/5959">
Write-up by Mu Dynamics</a><br>
<b>Recommendation:</b> Upgrade to libtasn1 2.12.</td>
</tr>
<tr>
<td><div class="emph-box" id="GNUTLS-SA-2012-2">GNUTLS-SA-2012-2</div></td>
<td>
<a href="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-1573">
CVE-2012-1573</a>
</td>
<td>Possible buffer overflow/Denial of service</td>
<td>TLS record handling vulnerability fixed in <a href="http://article.gmane.org/gmane.comp.encryption.gpg.gnutls.devel/5912">GnuTLS 3.0.15</a>.<br>
<a href="http://article.gmane.org/gmane.comp.encryption.gpg.gnutls.devel/5959">
Write-up by Mu Dynamics</a><br>
<b>Recommendation:</b> Upgrade to GnuTLS 3.0.17 or 2.12.18.</td>
</tr>
<tr>
<td><div class="emph-box" id="GNUTLS-SA-2012-1">GNUTLS-SA-2012-1</div></td>
<td>
<a href="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-0390">
CVE-2012-0390</a>
</td>
<td>Timing attack (DTLS)</td>
<td> <a href="http://article.gmane.org/gmane.comp.encryption.gpg.gnutls.devel/5657">
Announcement of GnuTLS 3.0.11</a><br>
<a href="http://www.isg.rhul.ac.uk/~kp/dtls.pdf">
The paper describing the attack</a><br>
This vulnerability allows an attacker to perform partial plaintext recovery
using a timing attack in CBC-mode encryption. The attack is applicable to Datagram TLS (DTLS).
<br>
<b>Recommendation:</b> Upgrade to GnuTLS 3.0.11.
</tr>
<tr>
<td><div class="emph-box" id="GNUTLS-SA-2011-2">GNUTLS-SA-2011-2</div></td>
<td>
<a href="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-4128">
CVE-2011-4128</a>
</td>
<td>Possible buffer overflow/Denial of service</td>
<td> <a href="http://article.gmane.org/gmane.comp.encryption.gpg.gnutls.devel/5596">
Mailing list discussion</a>
<br>
Note that this vulnerability is triggered by TLS clients that utilize the session resumption
functions in a particular way. Clients that perform session resumption using the
same steps as in <a href="http://www.gnutls.org/manual/html_node/Client-with-Resume-capability-example.html#Client-with-Resume-capability-example">the example
code of GnuTLS documentation</a> are not vulnerable. A preliminary analysis found no vulnerable clients.
<b>Recommendation:</b> Upgrade to GnuTLS 3.0.7 or 2.12.14.
</tr>
<tr>
<td><div class="emph-box" id="GNUTLS-SA-2011-1">GNUTLS-SA-2011-1</div></td>
<td>
<a href="http://www.ekoparty.org/2011/juliano-rizzo.php">
Rizzo attack on TLS</a>
</td>
<td>Plaintext recovery</td>
<td><a href="http://lists.gnu.org/archive/html/gnutls-devel/2011-09/msg00064.html">
Mailing list discussion</a>
<br>
<b>Recommendation:</b> Make use of TLS 1.1 or TLS 1.2 protocols that are not vulnerable to the attack.
TLS 1.1 is enabled by default in GnuTLS since version 2.0.0 (released in 2007). If this is not possible, disable CBC ciphers.</td>
</tr>
<tr>
<td><div class="emph-box" id="GNUTLS-SA-2010-1">GNUTLS-SA-2010-1</div></td>
<td>
<a href="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2010-0731">
CVE-2010-0731</a>
</td>
<td>Remote Denial of Service</td>
<td><a href="https://bugzilla.redhat.com/show_bug.cgi?id=573028">
RedHat bugzilla report</a><br>
<a href="http://thread.gmane.org/gmane.comp.encryption.gpg.gnutls.devel/4230">
Mailing list discussion</a>
<p>This vulnerability is on a deprecated since 2006 version of GnuTLS. We keep the information here because this version was included in some distributions.
<b>Recommendation:</b> Upgrade to the latest stable branch.</td>
</tr>
<tr>
<td><div class="emph-box" id="GNUTLS-SA-2009-5">GNUTLS-SA-2009-5</div></td>
<td>
<a href="http://www.kb.cert.org/vuls/id/120541">CERT VU#120541</a><br>
<a href="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-3555">
CVE-2009-3555</a>
</td>
<td>Plaintext injection attack</td>
<td><a href="http://thread.gmane.org/gmane.network.gnutls.general/1838">
Mailing list discussion</a>
<p><b>Recommendation:</b> Disable support for TLS renegotiation
in application servers, or better upgrade to GnuTLS 2.10.x.</td>
</tr>
<tr>
<td><div class="emph-box" id="GNUTLS-SA-2009-4">GNUTLS-SA-2009-4</div></td>
<td>
<a href="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-2730">
CVE-2009-2730</a>
</td>
<td>False positive in certificate hostname validation</td>
<td><a href="http://article.gmane.org/gmane.network.gnutls.general/1743">
Announcement of v2.8.3 that solves the problem.</a><br>
<a href="http://lists.gnu.org/archive/html/help-gnutls/2009-08/msg00011.html">
Analysis of the vulnerability and minimal patch.</a><br>
<a href="http://lists.gnu.org/archive/html/gnutls-devel/2009-08/msg00062.html">
How to check if your GnuTLS library is vulnerable.</a><br>
Back-ported patches for earlier releases:
<a href="http://article.gmane.org/gmane.comp.security.oss.general/1994">[1]</a>
<a href="http://article.gmane.org/gmane.comp.encryption.gpg.gnutls.devel/3790">[2]</a><br>
<b>Recommendation:</b> Upgrade to GnuTLS 2.8.3 or later.</td>
</tr>
<tr>
<td><div class="emph-box" id="GNUTLS-SA-2009-3">GNUTLS-SA-2009-3</div></td>
<td>
<a href="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-1417">
CVE-2009-1417</a>
</td>
<td>No checking of certificate activation/expiration times</td>
<td><a href="http://article.gmane.org/gmane.comp.encryption.gpg.gnutls.devel/3517">Security advisory including patch</a><br>
<a href="http://article.gmane.org/gmane.comp.encryption.gpg.gnutls.devel/3514">
Announcement of v2.6.6 that includes patch.</a><br>
<b>Recommendation:</b> Upgrade to GnuTLS 2.6.6 or later. If you
still use the 2.4.x branch or earlier branches, apply the
patch.</td>
</tr>
<tr>
<td><div class="emph-box" id="GNUTLS-SA-2009-2">GNUTLS-SA-2009-2</div></td>
<td>
<a href="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-1416">
CVE-2009-1416</a>
</td>
<td>GnuTLS 2.6.x DSA keys are corrupt</td>
<td><a href="http://article.gmane.org/gmane.comp.encryption.gpg.gnutls.devel/3516">Security advisory including patch</a><br>
<a href="http://article.gmane.org/gmane.comp.encryption.gpg.gnutls.devel/3514">
Announcement of v2.6.6 that includes patch.</a><br>
<b>Recommendation:</b> If you are using GnuTLS 2.6.x, upgrade to GnuTLS 2.6.6.</td>
</tr>
<tr>
<td><div class="emph-box" id="GNUTLS-SA-2009-1">GNUTLS-SA-2009-1</div></td>
<td>
<a href="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-1415">
CVE-2009-1415</a>
</td>
<td>Double/invalid free in GnuTLS 2.6.x on certain errors</td>
<td><a href="http://article.gmane.org/gmane.comp.encryption.gpg.gnutls.devel/3515">Security advisory including patch</a><br>
<a href="http://article.gmane.org/gmane.comp.encryption.gpg.gnutls.devel/3514">
Announcement of v2.6.6 that includes patch.</a><br>
<b>Recommendation:</b> If you are using GnuTLS 2.6.x, upgrade to GnuTLS 2.6.6.</td>
</tr>
<tr>
<td><div class="emph-box" id="GNUTLS-SA-2008-3">GNUTLS-SA-2008-3</div></td>
<td>
<a href="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-4989">
CVE-2008-4989</a>
</td>
<td>Remote X.509 Trust Chain Validation error</td>
<td><a href="http://article.gmane.org/gmane.comp.encryption.gpg.gnutls.devel/3215">Announcement of v2.6.1 and patch</a><br>
<a href="http://article.gmane.org/gmane.comp.encryption.gpg.gnutls.devel/3217">
Detailed analysis</a><br>
<a href="http://article.gmane.org/gmane.comp.encryption.gpg.gnutls.devel/3248">
Announcement of v2.6.2 and updated patch.</a><br>
<a href="http://article.gmane.org/gmane.network.gnutls.general/1499">
Announcement of updated patch and 2.6.3 release candidate.</a><br>
<a href="http://article.gmane.org/gmane.network.gnutls.general/1500">
Announcement of v2.6.3.</a><br>
<a href="http://article.gmane.org/gmane.comp.encryption.gpg.gnutls.devel/3411">
Announcement of v2.6.4 and v2.4.3.</a><br>
<b>Recommendation:</b> Upgrade to GnuTLS 2.6.4 or, if you still use the 2.4.x branch, 2.4.3, or later.</td>
</tr>
<tr>
<td><div class="emph-box" id="GNUTLS-SA-2008-2">GNUTLS-SA-2008-2</div></td>
<td>
<a href="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-2377">
CVE-2008-2377</a>
</td>
<td>Local denial of service<br>
Server can trigger crash in GnuTLS clients?</td>
<td><a href="http://article.gmane.org/gmane.comp.encryption.gpg.gnutls.devel/2947">Announcement</a><br>
<a href="http://article.gmane.org/gmane.comp.encryption.gpg.gnutls.devel/2948">
Detailed analysis and patch</a><br>
<a href="https://savannah.gnu.org/support/?106491">Another report that suggest it can be exploited by hostile servers</a><br>
<b>Recommendation:</b> Upgrade to GnuTLS 2.4.1 or apply the
patch.</td>
</tr>
<tr>
<td><div class="emph-box" id="GNUTLS-SA-2008-1">GNUTLS-SA-2008-1</div></td>
<td>
<a href="https://www.cert.fi/haavoittuvuudet/advisory-gnutls.html">CERT-FI announcement</a><br>
<a href="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1948">CVE-2008-1948</a>,
<a href="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1949">CVE-2008-1949</a>,
<a href="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1950">CVE-2008-1950</a>
</td>
<td>Remote Denial of Service</td>
<td><a href="http://article.gmane.org/gmane.comp.encryption.gpg.gnutls.devel/2803">Announcement and Patch</a><br>
<a href="http://lists.gnu.org/archive/html/gnutls-devel/2008-05/msg00060.html">Updated announcement and Patch</a><br>
<b>Recommendation:</b> Upgrade to GnuTLS 2.2.5 or apply the
patch in the second link.</td>
</tr>
<tr>
<td><div class="emph-box" id="GNUTLS-SA-2006-4">GNUTLS-SA-2006-4</div></td>
<td>
<a href="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-4790">CVE-2006-4790</a><br>(<a href="http://nvd.nist.gov/nvd.cfm?cvename=CVE-2006-4790">via NVD</a>)
</td>
<td>False positive in verifying signature</td>
<td><a href="http://lists.gnupg.org/pipermail/gnutls-dev/2006-September/001205.html">Announcement</a><br>
<a href="http://lists.gnupg.org/pipermail/gnutls-dev/2006-September/001212.html">Updated patch</a><br>
<a href="http://lists.gnupg.org/pipermail/gnutls-dev/2006-September/001240.html">Original report</a><br>
<b>Recommendation:</b> Upgrade to GnuTLS 1.4.4.</td>
</tr>
<tr>
<td><div class="emph-box" id="GNUTLS-SA-2006-3">GNUTLS-SA-2006-3</div></td>
<td></td>
<td>None</td>
<td><a href="http://lists.gnupg.org/pipermail/gnutls-dev/2006-September/001203.html">Announcement</a><br>
<a href="http://www.bell-labs.com/user/bleichen/papers/pkcs.ps">Bleichenbacher's Crypto 98 paper</a><br>
<b>Recommendation:</b>
No action required, see the <a href="http://lists.gnupg.org/pipermail/gnutls-dev/2006-September/001208.html">post where this advisory is essentially withdrawn</a>.</td>
</tr>
<tr>
<td><div class="emph-box" id="GNUTLS-SA-2006-2">GNUTLS-SA-2006-2</div></td>
<td>
<a href="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-7239">CVE-2006-7239</a></td>
<td>Denial of service?</td>
<td><a href="http://lists.gnupg.org/pipermail/gnutls-dev/2006-August/001190.html">Details</a><br>
<b>Recommendation:</b> Upgrade to GnuTLS 1.4.2.</td>
</tr>
<tr>
<td><div class="emph-box" id="GNUTLS-SA-2006-1">GNUTLS-SA-2006-1</div></td>
<td>
<a href="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-0645">CVE-2006-0645</a></td>
<td>Denial of service?</td>
<td><a href="http://lists.gnupg.org/pipermail/gnutls-dev/2006-February/001058.html">Libtasn1 Announcement</a><br>
<b>Recommendation:</b> Upgrade to Libtasn1 0.2.18 and GnuTLS 1.2.10 (stable) or 1.3.4 (experimental).</td>
</tr>
<tr>
<td><div class="emph-box" id="GNUTLS-SA-2005-1">GNUTLS-SA-2005-1</div></td>
<td>
<a href="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-1431">CVE-2005-1431</a></td>
<td>Denial of service</td>
<td><a href="http://lists.gnu.org/archive/html/help-gnutls/2005-04/msg00039.html">Announcement</a><br>
<a href="http://lists.gnu.org/archive/html/help-gnutls/2005-05/msg00004.html">
Write-up by Éric Leblond</a><br>
<b>Recommendation:</b> Upgrade to GnuTLS 1.0.25 or 1.2.3.</td>
</tr>
</table>
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