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    <link>https://cve.radiocsirt.org</link>
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      <title>CVE-2025-57767 — Asterisk can crash from a specifically malformed Authorization header in an incoming SIP request</title>
      <link>https://cve.radiocsirt.org/vuln/cve-2025-57767</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. Prior to versions 20.15.2, 21.10.2, and 22.5.2, if a SIP request is received with an Authorization header that contains a realm that wasn&amp;#39;t in a previous 401 response&amp;#39;s WWW-Authenticate header, or an Authorization header with an incorrect realm was received without a previous 401 response being sent, the get_authorization_header() function in res_pjsip_authenticator_digest will return a NULL. This wasn&amp;#39;t being checked before attempting to get the digest algorithm from the header which causes a SEGV. This issue has been patched in versions 20.15.2, 21.10.2, and 22.5.2. There are no workarounds.&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. Prior to versions 20.15.2, 21.10.2, and 22.5.2, if a SIP request is received with an Authorization header that contains a realm that wasn&amp;#39;t in a previous 401 response&amp;#39;s WWW-Authenticate header, or an Authorization header with an incorrect realm was received without a previous 401 response being sent, the get_authorization_header() function in res_pjsip_authenticator_digest will return a NULL. This wasn&amp;#39;t being checked before attempting to get the digest algorithm from the header which causes a SEGV. This issue has been patched in versions 20.15.2, 21.10.2, and 22.5.2. There are no workarounds.&lt;/p&gt;</content:encoded>
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