CVE-2019-10842 Bootstrap-sass contains code execution backdoor
An attacker can execute arbitrary code on systems using the bootstrap-sass library by sending a maliciously crafted cookie value.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2019-10842?
CVE-2019-10842 is a critical code injection vulnerability in n/a, published on 4 Apr 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Arbitrary code execution (via backdoor code) was discovered in bootstrap-sass 3.2.0.3, when downloaded from rubygems.org. An unauthenticated attacker can craft the ___cfduid cookie value with base64 arbitrary code to be executed via eval(), which can be leveraged to execute arbitrary code on the target system. Note that there are three underscore characters in the cookie name. This is unrelated to the __cfduid cookie that is legitimately used by Cloudflare.
Weakness: CWE-94
Which versions are affected by CVE-2019-10842?
2 open source packages ship an affected version, including bootstrap-sass. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
bootstrap-sass RubyGems | From 3.2.0.3 | 3.2.0.4 |
bootstrap-sass RubyGems | From 3.2.0.3 | 3.2.0.4 |
Products include Getbootstrap Bootstrap-Sass.
How do I fix CVE-2019-10842?
Upgrade bootstrap-sass to 3.2.0.4 or later.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2019-10842 being exploited?
There is no known exploitation of CVE-2019-10842 in the wild and no public exploit code.
Sources
Also known as GHSA-vqqv-v9m2-48p2.