CVE-2019-19507 Validation bypass is possible in Json Pattern Validator
Attackers can bypass type validation in the jpv library by overwriting internal attributes, allowing crafted payloads to evade security checks.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2019-19507?
CVE-2019-19507 is a medium-severity vulnerability in n/a, published on 2 Dec 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
In jpv (aka Json Pattern Validator) before 2.1.1, compareCommon() can be bypassed because certain internal attributes can be overwritten via a conflicting name, as demonstrated by 'constructor': {'name':'Array'}. This affects validate(). Hence, a crafted payload can overwrite this builtin attribute to manipulate the type detection result.
Weakness: CWE-287
Which versions are affected by CVE-2019-19507?
2 open source packages ship an affected version, including jpv. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
jpv npm | All versions | 2.1.1 |
jpv npm | All versions | 2.1.1 |
Products include Json Pattern Validator Project Json Pattern Validator.
How do I fix CVE-2019-19507?
Upgrade jpv to 2.1.1 or later.
Is CVE-2019-19507 being exploited?
There is no known exploitation of CVE-2019-19507 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as GHSA-rh46-3fgc-mvrf.