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<p class="MsoNormal">Thank you for the quick response!! <span style="font-family:"Segoe UI Emoji",sans-serif">
😊</span><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><b><span style="color:#4472C4">Thanks & Regards,<o:p></o:p></span></b></p>
<p class="MsoNormal"><b>Prachi Mayekar<o:p></o:p></b></p>
<p class="MsoNormal">ITI-Network Services<o:p></o:p></p>
<p class="MsoNormal">A Contingent Worker at Intel<o:p></o:p></p>
<p class="MsoNormal">For assistance, please visit us at <a href="https://it.intel.com/">
https://it.intel.com</a><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><b>From:</b> László Várady <laszlo.varady@axoflow.com> <br>
<b>Sent:</b> Monday, October 16, 2023 2:00 PM<br>
<b>To:</b> Syslog-ng users' and developers' mailing list <syslog-ng@lists.balabit.hu><br>
<b>Cc:</b> Mayekar, PrachiX <prachix.mayekar@intel.com><br>
<b>Subject:</b> Re: [syslog-ng] Vulnerability making News - HTTP/2 Rapid Reset DDoS CVE-2023-44487<o:p></o:p></p>
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<p class="MsoNormal">Hi,<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">syslog-ng doesn't use HTTP/2 in its core, so we are not directly affected by CVE-2023-44487.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">The gRPC plugin of syslog-ng may be affected indirectly through the gRPC libraries we use, but<span class="gmail-rynqvb"><span lang="EN"> so far I haven't found any official comment on this by the gRPC developers other than the following
fix in their Go library:</span></span><o:p></o:p></p>
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<p class="MsoNormal"><a href="https://github.com/grpc/grpc-go/pull/6703">https://github.com/grpc/grpc-go/pull/6703</a><o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">In summary, if you don't use the OpenTelemetry or Loki plugins of syslog-ng, syslog-ng is not affected by the above CVE.<o:p></o:p></p>
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<p class="MsoNormal">If you use either the OpenTelemetry or the Loki plugins, please wait for the gRPC announcement whether their C++ library is affected or not.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">--<o:p></o:p></p>
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<p class="MsoNormal">László Várady<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">On Mon, Oct 16, 2023 at 10:10 AM Mayekar, PrachiX <<a href="mailto:prachix.mayekar@intel.com">prachix.mayekar@intel.com</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Hi Team,<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Are syslog products vulnerable to this vulnerability ?<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Need to know if Syslog is affected:<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="m4259575637719768759msoplaintext"><b><span lang="EN-CA">CVE-2023-44487 is a vulnerability in the HTTP/2 protocol that was recently used to launch DDoS attacks. The vulnerability allows for denial of service (DoS) because request cancellation can reset
many streams quickly. <a href="https://www.bleepingcomputer.com/news/security/new-http-2-rapid-reset-zero-day-attack-breaks-ddos-records/" target="_blank">
<span style="color:windowtext;text-decoration:none">https://www.bleepingcomputer.com/news/security/new-http-2-rapid-reset-zero-day-attack-breaks-ddos-records/</span></a></span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span style="color:#4472C4">Thanks & Regards,</span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b>Prachi Mayekar</b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">ITI-Network Services<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">A Contingent Worker at Intel<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">For assistance, please visit us at
<a href="https://it.intel.com/" target="_blank">https://it.intel.com</a><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">______________________________________________________________________________<br>
Member info: <a href="https://lists.balabit.hu/mailman/listinfo/syslog-ng" target="_blank">
https://lists.balabit.hu/mailman/listinfo/syslog-ng</a><br>
Documentation: <a href="http://www.balabit.com/support/documentation/?product=syslog-ng" target="_blank">
http://www.balabit.com/support/documentation/?product=syslog-ng</a><br>
FAQ: <a href="http://www.balabit.com/wiki/syslog-ng-faq" target="_blank">http://www.balabit.com/wiki/syslog-ng-faq</a><o:p></o:p></p>
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