CVE-2020-35380 Denial of service in GJSON

High 7.5 Published 15 Dec 2020 Updated 4 Aug 2024

Attackers can cause a denial of service in applications using the GJSON library by submitting crafted JSON input.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: Available

What is CVE-2020-35380?

CVE-2020-35380 is a high-severity denial of service vulnerability in n/a, published on 15 Dec 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

GJSON before 1.6.4 allows attackers to cause a denial of service via crafted JSON.

Which versions are affected by CVE-2020-35380?

3 open source packages ship an affected version, including github.com/tidwall/gjson. It affects 1 product.

Package	Affected	Fixed in
`github.com/tidwall/gjson` Go	All versions	`1.6.4`
`github.com/tidwall/gjson` Go	All versions	`1.6.4`
`github.com/tidwall/gjson` Go	All versions	`1.6.4`

Products include Gjson Project Gjson.

How do I fix CVE-2020-35380?

Upgrade github.com/tidwall/gjson to 1.6.4 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-2020-35380 being exploited?

There is no known exploitation of CVE-2020-35380 in the wild and no public exploit code.

Sources

Also known as DEBIAN-CVE-2020-35380, GHSA-w942-gw6m-p62c, GO-2021-0059, UBUNTU-CVE-2020-35380.