What is CVE-2023-30847?

CVE-2023-30847 is a high-severity vulnerability in Dena H2o, classified under Access of Uninitialized Pointer. CVSS score: 8.2/10. Published 2023-04-27.

How severe is CVE-2023-30847?

High severity. CVSS v3 base score is 8.2 out of 10.

Vulnerability in Dena H2o

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.

EPSS: 0.009 (56.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H.

Affected products

Dena H2o — versions 2.3.0
H2o — versions <= 2.3.0-beta2

Weakness classification (CWE)

CWE-824 — Access of Uninitialized Pointer

References

security-advisories@github.com (x_refsource_CONFIRM, Patch, Vendor Advisory)
security-advisories@github.com (x_refsource_MISC, Vendor Advisory)
security-advisories@github.com (Patch, x_refsource_MISC)

Frequently asked questions

What is CVE-2023-30847?: CVE-2023-30847 is a high-severity vulnerability in Dena H2o, classified under Access of Uninitialized Pointer. CVSS score: 8.2/10. Published 2023-04-27.
How severe is CVE-2023-30847?: High severity. CVSS v3 base score is 8.2 out of 10.