CVE-2021-23518 Prototype Pollution
Prototype pollution in cached-path-relative allows attackers to manipulate object prototypes, potentially leading to code execution or security bypasses.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-23518?
CVE-2021-23518 is a high-severity vulnerability in Debian Debian Linux, published on 21 Jan 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The package cached-path-relative before 1.1.0 are vulnerable to Prototype Pollution via the cache variable that is set as {} instead of Object.create(null) in the cachedPathRelative function, which allows access to the parent prototype properties when the object is used to create the cached relative path. When using the origin path as __proto__, the attribute of the object is accessed instead of a path. **Note:** This vulnerability derives from an incomplete fix in https://security.snyk.io/vuln/SNYK-JS-CACHEDPATHRELATIVE-72573
Weakness: CWE-1321
Which versions are affected by CVE-2021-23518?
2 open source packages ship an affected version, including cached-path-relative. It affects 2 products.
| Package | Affected | Fixed in |
|---|---|---|
cached-path-relative npm | All versions | 1.1.0 |
cached-path-relative npm | All versions | 1.1.0 |
Products include Cached-Path-Relative Project Cached-Path-Relative, Debian Debian Linux.
How do I fix CVE-2021-23518?
Upgrade cached-path-relative to 1.1.0 or later.
Is CVE-2021-23518 being exploited?
There is no known exploitation of CVE-2021-23518 in the wild and no public exploit code.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as DEBIAN-CVE-2021-23518, GHSA-wg6g-ppvx-927h, UBUNTU-CVE-2021-23518.