h2oai/h2o-3: Synchronous Access of Remote Resource without Timeout
CVE-2024-8062 is a high-severity synchronous access of remote resource without timeout vulnerability in h2oai/h2o-3 from H2oai, with a CVSS 3.1 base score of 7.5 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. Affected h2oai/h2o-3 versions: latest and earlier. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 0.48% chance of exploitation within 30 days, which is low compared with other CVEs.
High severity with no evidence of exploitation so far.
What to do
- Check which version of h2oai/h2o-3 you run against the affected versions below, and install the vendor's latest release.
- Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| H2oai | h2oai/h2o-3 | latest and earlier | Not stated |
| H2o | H2o | 3.46.0 | Not stated |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- NetworkCan be exploited remotely over a network, including the internet.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- NoneNo account or login is needed.
- User interaction
- NoneNo action by a victim is required.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- NoneNo data is disclosed.
- Integrity
- NoneNothing can be modified.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 7.5 | High | NVD |
| CVSS 3.0 | 7.5 | High | CNA (huntr.dev) |
Official description
A vulnerability in the typeahead endpoint of h2oai/h2o-3 version 3.46.0 allows for a denial of service. The endpoint performs a `HEAD` request to verify the existence of a specified resource without setting a timeout. An attacker can exploit this by sending multiple requests to an attacker-controlled server that hangs, causing the application to block and become unresponsive to other requests.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Synchronous Access of Remote Resource without Timeout
The code has a synchronous call to a remote resource, but there is no timeout for the call, or the timeout is set to infinite.
More Synchronous Access of Remote Resource without Timeout vulnerabilities (CWE-1088)
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: poc, automatable: yes, technical impact: partial).
- Record last changed materially (score, affected products, status or references).
References
Technical write-ups (may include proof of concept)
- huntr.com/bounties/a04190d9-4acb-449a-9a7f-f1bf6be1ed23Exploit, Third Party Advisory
Other vulnerabilities in h2oai/h2o-3
- 9.8 Critical severity
- 9.1 Critical severity
- 9.8 Critical severity
- 9.8 Critical severity
- 9.8 Critical severity
- 8.2 High severity
Recent Synchronous Access of Remote Resource without Timeout vulnerabilities
- 7.5 High severity
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