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Vulnerable Software

Vulnerability Details CVE-2023-30847

H2O is an HTTP server. In versions 2.3.0-beta2 and prior, when the reverse proxy handler tries to processes a certain type of invalid HTTP request, it tries to build an upstream URL by reading from uninitialized pointer. This behavior can lead to crashes or leak of information to back end HTTP servers. Pull request number 3229 fixes the issue. The pull request has been merged to the `master` branch in commit f010336. Users should upgrade to commit f010336 or later.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.003
EPSS Ranking 49.3%
CVSS Severity
CVSS v3 Score 8.2
Products affected by CVE-2023-30847
  • Dena » H2o » Version: 0.9.0
    cpe:2.3:a:dena:h2o:0.9.0
  • Dena » H2o » Version: 0.9.1
    cpe:2.3:a:dena:h2o:0.9.1
  • Dena » H2o » Version: 0.9.2
    cpe:2.3:a:dena:h2o:0.9.2
  • Dena » H2o » Version: 1.0.0
    cpe:2.3:a:dena:h2o:1.0.0
  • Dena » H2o » Version: 1.0.1
    cpe:2.3:a:dena:h2o:1.0.1
  • Dena » H2o » Version: 1.1.0
    cpe:2.3:a:dena:h2o:1.1.0
  • Dena » H2o » Version: 1.1.1
    cpe:2.3:a:dena:h2o:1.1.1
  • Dena » H2o » Version: 1.2.0
    cpe:2.3:a:dena:h2o:1.2.0
  • Dena » H2o » Version: 1.3.0
    cpe:2.3:a:dena:h2o:1.3.0
  • Dena » H2o » Version: 1.3.1
    cpe:2.3:a:dena:h2o:1.3.1
  • Dena » H2o » Version: 1.4.0
    cpe:2.3:a:dena:h2o:1.4.0
  • Dena » H2o » Version: 1.4.1
    cpe:2.3:a:dena:h2o:1.4.1
  • Dena » H2o » Version: 1.4.2
    cpe:2.3:a:dena:h2o:1.4.2
  • Dena » H2o » Version: 1.4.3
    cpe:2.3:a:dena:h2o:1.4.3
  • Dena » H2o » Version: 1.4.4
    cpe:2.3:a:dena:h2o:1.4.4
  • Dena » H2o » Version: 1.4.5
    cpe:2.3:a:dena:h2o:1.4.5
  • Dena » H2o » Version: 1.5.0
    cpe:2.3:a:dena:h2o:1.5.0
  • Dena » H2o » Version: 1.5.1
    cpe:2.3:a:dena:h2o:1.5.1
  • Dena » H2o » Version: 1.5.2
    cpe:2.3:a:dena:h2o:1.5.2
  • Dena » H2o » Version: 1.5.3
    cpe:2.3:a:dena:h2o:1.5.3
  • Dena » H2o » Version: 1.5.4
    cpe:2.3:a:dena:h2o:1.5.4
  • Dena » H2o » Version: 1.5.5
    cpe:2.3:a:dena:h2o:1.5.5
  • Dena » H2o » Version: 1.6.0
    cpe:2.3:a:dena:h2o:1.6.0
  • Dena » H2o » Version: 1.6.1
    cpe:2.3:a:dena:h2o:1.6.1
  • Dena » H2o » Version: 1.6.2
    cpe:2.3:a:dena:h2o:1.6.2
  • Dena » H2o » Version: 1.6.3
    cpe:2.3:a:dena:h2o:1.6.3
  • Dena » H2o » Version: 1.7.0
    cpe:2.3:a:dena:h2o:1.7.0
  • Dena » H2o » Version: 1.7.1
    cpe:2.3:a:dena:h2o:1.7.1
  • Dena » H2o » Version: 1.7.2
    cpe:2.3:a:dena:h2o:1.7.2
  • Dena » H2o » Version: 1.7.3
    cpe:2.3:a:dena:h2o:1.7.3
  • Dena » H2o » Version: 2.0.0
    cpe:2.3:a:dena:h2o:2.0.0
  • Dena » H2o » Version: 2.0.1
    cpe:2.3:a:dena:h2o:2.0.1
  • Dena » H2o » Version: 2.0.2
    cpe:2.3:a:dena:h2o:2.0.2
  • Dena » H2o » Version: 2.0.3
    cpe:2.3:a:dena:h2o:2.0.3
  • Dena » H2o » Version: 2.0.4
    cpe:2.3:a:dena:h2o:2.0.4
  • Dena » H2o » Version: 2.0.5
    cpe:2.3:a:dena:h2o:2.0.5
  • Dena » H2o » Version: 2.0.6
    cpe:2.3:a:dena:h2o:2.0.6
  • Dena » H2o » Version: 2.1.0
    cpe:2.3:a:dena:h2o:2.1.0
  • Dena » H2o » Version: 2.2.0
    cpe:2.3:a:dena:h2o:2.2.0
  • Dena » H2o » Version: 2.2.1
    cpe:2.3:a:dena:h2o:2.2.1
  • Dena » H2o » Version: 2.2.2
    cpe:2.3:a:dena:h2o:2.2.2
  • Dena » H2o » Version: 2.2.3
    cpe:2.3:a:dena:h2o:2.2.3
  • Dena » H2o » Version: 2.2.4
    cpe:2.3:a:dena:h2o:2.2.4
  • Dena » H2o » Version: 2.2.5
    cpe:2.3:a:dena:h2o:2.2.5
  • Dena » H2o » Version: 2.2.6
    cpe:2.3:a:dena:h2o:2.2.6
  • Dena » H2o » Version: 2.3.0
    cpe:2.3:a:dena:h2o:2.3.0


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