CVE-2023-30847
This behavior can lead to crashes or leak of information to back end HTTP servers.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.90%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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.
- CVSS 3.1
- 8.2 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
- EPSS
- 0.90% probability · 58th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-824
- Affected
- dena/h2o
- Source
- security-advisories@github.com
References
- https://github.com/h2o/h2o/commit/f010336bab162839df43d9e87570897466c97e33Patch
- https://github.com/h2o/h2o/pull/3229Vendor Advisory
- https://github.com/h2o/h2o/security/advisories/GHSA-p5hj-phwj-hrvxPatch, Vendor Advisory
- https://github.com/h2o/h2o/commit/f010336bab162839df43d9e87570897466c97e33Patch
- https://github.com/h2o/h2o/pull/3229Vendor Advisory
- https://github.com/h2o/h2o/security/advisories/GHSA-p5hj-phwj-hrvxPatch, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.