CVE-2019-10795 Prototype Pollution in undefsafe
Attackers can pollute Object.prototype via the undefsafe library, potentially leading to code execution or privilege escalation in Node.js applications.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2019-10795?
CVE-2019-10795 is a medium-severity vulnerability in Snyk undefsafe, published on 18 Feb 2020. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
undefsafe before 2.0.3 is vulnerable to Prototype Pollution. The 'a' function could be tricked into adding or modifying properties of Object.prototype using a __proto__ payload.
Weakness: CWE-74
Which versions are affected by CVE-2019-10795?
2 open source packages ship an affected version, including undefsafe. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
undefsafe npm | All versions | 2.0.3 |
undefsafe npm | All versions | 2.0.3 |
Products include Undefsafe Project Undefsafe.
How do I fix CVE-2019-10795?
Upgrade undefsafe to 2.0.3 or later.
Is CVE-2019-10795 being exploited?
There is no known exploitation of CVE-2019-10795 in the wild and no public exploit code.
Sources
Also known as AZL-44064, GHSA-332q-7ff2-57h2, SNYK-JS-UNDEFSAFE-548940.