CVE-2023-34620 hjson stack exhaustion vulnerability
Attackers can cause denial of service in HJSON parsers by submitting crafted objects with cyclic dependencies.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2023-34620?
CVE-2023-34620 is a high-severity denial of service vulnerability in n/a, published on 14 Jun 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
An issue was discovered hjson thru 3.0.0 allows attackers to cause a denial of service or other unspecified impacts via crafted object that uses cyclic dependencies.
Weakness: CWE-787
Which versions are affected by CVE-2023-34620?
8 open source packages ship an affected version, including github.com/hjson/hjson-go/v4, github.com/hjson/hjson-go and org.hjson:hjson. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
github.com/hjson/hjson-go/v4 Go | All versions | 4.5.0 |
github.com/hjson/hjson-go/v4 Go | All versions | 4.5.0 |
github.com/hjson/hjson-go/v4 Go | All versions | 4.5.0 |
github.com/hjson/hjson-go Go | All versions | None |
org.hjson:hjson Maven | All versions | 3.0.1 |
org.hjson:hjson Maven | All versions | 3.0.1 |
2 more packages
laktak/hjson Packagist | All versions | 2.3.0 |
laktak/hjson Packagist | All versions | 2.3.0 |
Products include Hjson Project Hjson.
How do I fix CVE-2023-34620?
Upgrade github.com/hjson/hjson-go/v4 to 4.5.0 or later.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2023-34620 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-34620 exists.
Sources
Also known as GHSA-5wfc-hjrc-gq87, GO-2026-5157.