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fix stack overflow when sending huge request body to upstream (CVE-2017-10869) #1460

kazuho opened this issue Oct 18, 2017 · 1 comment


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kazuho commented Oct 18, 2017

The worker process of H2O may crash (and automatically respawned depending on the configuration) while the reverse proxy module tries to forward a huge HTTP request body to the upstream server using HTTPS.

The crash disrupts other requests in-flight, and therefore is being classified as a DoS vulnerability.

Details TBD.

Affected systems: H2O up to version 2.2.2, used as a reverse proxy that connects to the origin server using HTTPS.
Resolution: upgrade to 2.2.3.

@kazuho kazuho changed the title test fix stack overflow when sending huge request body to upstream (CVE-2017-10869) Oct 19, 2017
@kazuho kazuho closed this as completed Jan 12, 2018
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NicoleG25 commented Jan 2, 2020

@kazuho Was this vulnerability ever addressed ? and if so in what commit was this fixed ?

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