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.
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.009 (58.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 58th percentile — 58.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000
Affected products
Weakness classification (CWE)
References
- github.com/h2o/h2o/security/advisories/GHSA-p5hj-phwj-hrvx (Patch, Vendor Advisory)
- github.com/h2o/h2o/pull/3229 (Vendor Advisory)
- github.com/h2o/h2o/commit/f010336bab162839df43d9e87570897466c97e33 (Patch)
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.