Vulnerability Details : CVE-2019-10842
Potential exploit
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.
Vulnerability category: Execute code
Products affected by CVE-2019-10842
- cpe:2.3:a:getbootstrap:bootstrap-sass:3.2.0.3:*:*:*:*:ruby:*:*
Exploit prediction scoring system (EPSS) score for CVE-2019-10842
45.13%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 97 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2019-10842
Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
---|---|---|---|---|---|---|
10.0
|
HIGH | AV:N/AC:L/Au:N/C:C/I:C/A:C |
10.0
|
10.0
|
NIST | |
9.8
|
CRITICAL | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
3.9
|
5.9
|
NIST |
CWE ids for CVE-2019-10842
-
The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment.Assigned by: nvd@nist.gov (Primary)
References for CVE-2019-10842
-
https://github.com/twbs/bootstrap-sass/issues/1195
3.2.0.3? · Issue #1195 · twbs/bootstrap-sass · GitHubIssue Tracking;Third Party Advisory
-
https://snyk.io/blog/malicious-remote-code-execution-backdoor-discovered-in-the-popular-bootstrap-sass-ruby-gem/
Malicious remote code execution backdoor discovered in the popular bootstrap-sass Ruby gem | SnykExploit;Third Party Advisory
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http://dgb.github.io/2019/04/05/bootstrap-sass-backdoor.html
Bootstrap Sass BackdoorThird Party Advisory
-
https://snyk.io/vuln/SNYK-RUBY-BOOTSTRAPSASS-174093
Malicious Package in bootstrap-sass | SnykExploit;Third Party Advisory
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