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      <title>CVE-2023-37457 — Asterisk's PJSIP_HEADER dialplan function can overwrite memory/cause crash when using 'update'</title>
      <link>https://cve.radiocsirt.org/vuln/cve-2023-37457</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; asterisk&lt;/p&gt;
&lt;p&gt;Asterisk is an open source private branch exchange and telephony toolkit. In Asterisk versions 18.20.0 and prior, 20.5.0 and prior, and 21.0.0; as well as ceritifed-asterisk 18.9-cert5 and prior, the &amp;#39;update&amp;#39; functionality of the PJSIP_HEADER dialplan function can exceed the available buffer space for storing the new value of a header. By doing so this can overwrite memory or cause a crash. This is not externally exploitable, unless dialplan is explicitly written to update a header based on data from an outside source. If the &amp;#39;update&amp;#39; functionality is not used the vulnerability does not occur. A patch is available at commit a1ca0268254374b515fa5992f01340f7717113fa.&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; asterisk&lt;/p&gt;
&lt;p&gt;Asterisk is an open source private branch exchange and telephony toolkit. In Asterisk versions 18.20.0 and prior, 20.5.0 and prior, and 21.0.0; as well as ceritifed-asterisk 18.9-cert5 and prior, the &amp;#39;update&amp;#39; functionality of the PJSIP_HEADER dialplan function can exceed the available buffer space for storing the new value of a header. By doing so this can overwrite memory or cause a crash. This is not externally exploitable, unless dialplan is explicitly written to update a header based on data from an outside source. If the &amp;#39;update&amp;#39; functionality is not used the vulnerability does not occur. A patch is available at commit a1ca0268254374b515fa5992f01340f7717113fa.&lt;/p&gt;</content:encoded>
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