CVE-2019-10842

moderate-risk
Published 2019-04-04

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.

Do I need to act?

~
8.9% chance of exploitation in next 30 days
EPSS score — moderate exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
9
CVSS 9.8/10 Critical
NETWORK / LOW complexity

Affected Products (1)

Bootstrap-Sass

Affected Vendors

Getbootstrap

References (8)

Third Party Advisory http://dgb.github.io/2019/04/05/bootstrap-sass-backdoor.html
Issue Tracking https://github.com/twbs/bootstrap-sass/issues/1195
Exploit https://snyk.io/blog/malicious-remote-code-execution-backdoor-discovered-in-the-...
Exploit https://snyk.io/vuln/SNYK-RUBY-BOOTSTRAPSASS-174093
Third Party Advisory http://dgb.github.io/2019/04/05/bootstrap-sass-backdoor.html
Issue Tracking https://github.com/twbs/bootstrap-sass/issues/1195
Exploit https://snyk.io/blog/malicious-remote-code-execution-backdoor-discovered-in-the-...
Exploit https://snyk.io/vuln/SNYK-RUBY-BOOTSTRAPSASS-174093
47
/ 100
moderate-risk
Severity 32/34 · Critical
Exploitability 10/34 · Low
Exposure 5/34 · Minimal