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    <title>Most recent entries from all</title>
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    <lastBuildDate>Wed, 07 Oct 2026 03:14:05 +0000</lastBuildDate>
    <item>
      <title>CVE-2023-6935 — Marvin Attack vulnerability in SP Math All RSA</title>
      <link>https://cve.radiocsirt.org/vuln/cve-2023-6935</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; wolfSSL&lt;/p&gt;
&lt;p&gt;wolfSSL SP Math All RSA implementation is vulnerable to the Marvin Attack, new variation of a timing Bleichenbacher style attack, when built with the following options to configure:&lt;/p&gt;
&lt;p&gt;--enable-all CFLAGS=&amp;#34;-DWOLFSSL_STATIC_RSA&amp;#34;&lt;/p&gt;
&lt;p&gt;The define “WOLFSSL_STATIC_RSA” enables static RSA cipher suites, which is not recommended, and has been disabled by default since wolfSSL 3.6.6.  Therefore the default build since 3.6.6, even with &amp;#34;--enable-all&amp;#34;, is not vulnerable to the Marvin Attack. The vulnerability is specific to static RSA cipher suites, and expected to be padding-independent.&lt;/p&gt;
&lt;p&gt;The vulnerability allows an attacker to decrypt ciphertexts and forge signatures after probing with a large number of test observations. However the server’s private key is not exposed.&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; wolfSSL&lt;/p&gt;
&lt;p&gt;wolfSSL SP Math All RSA implementation is vulnerable to the Marvin Attack, new variation of a timing Bleichenbacher style attack, when built with the following options to configure:&lt;/p&gt;
&lt;p&gt;--enable-all CFLAGS=&amp;#34;-DWOLFSSL_STATIC_RSA&amp;#34;&lt;/p&gt;
&lt;p&gt;The define “WOLFSSL_STATIC_RSA” enables static RSA cipher suites, which is not recommended, and has been disabled by default since wolfSSL 3.6.6.  Therefore the default build since 3.6.6, even with &amp;#34;--enable-all&amp;#34;, is not vulnerable to the Marvin Attack. The vulnerability is specific to static RSA cipher suites, and expected to be padding-independent.&lt;/p&gt;
&lt;p&gt;The vulnerability allows an attacker to decrypt ciphertexts and forge signatures after probing with a large number of test observations. However the server’s private key is not exposed.&lt;/p&gt;</content:encoded>
      <guid isPermaLink="false">https://cve.radiocsirt.org/vuln/cve-2023-6935</guid>
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