GitHub Advisoryadvisory · RubyGems
GHSA-52p9-v744-mwjj Remote code execution in Kramdown
HIGH
Official page ↗
- Aliases
- CVE-2021-28834
- Ecosystem
- RubyGems
- Packages
- kramdown
- Severity
- High
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weaknesses
- CWE-94
- Reviewed
- 2021-03-22
Affected packages
• RubyGems kramdown: >= 1.16.0, < 2.3.1 → fixed in 2.3.1
Description
Kramdown before 2.3.1 does not restrict Rouge formatters to the Rouge::Formatters namespace, and thus arbitrary classes can be instantiated.
Related
Alias · CVE (1)
- CVE-2021-28834 Kramdown before 2.3.1 does not restrict Rouge formatters to the Rouge::Formatters namespace, and thus arbitrary classes can be instantiated. vulnerability
Weakness · CWE (1)
- CWE-94 Improper Control of Generation of Code weakness
References
- https://nvd.nist.gov/vuln/detail/CVE-2021-28834 advisory
- https://github.com/gettalong/kramdown/pull/708 web
- https://github.com/stanhu/kramdown/commit/d6a1cbcb2caa2f8a70927f176070d126b2422760 web
- https://github.com/stanhu/kramdown/commit/ff0218aefcf00cd5a389e17e075d36cd46d011e2 web
- https://about.gitlab.com/releases/2021/03/17/security-release-gitlab-13-9-4-released/#remote-code-execution-via-unsafe-user-controlled-markdown-rendering-options web
- https://github.com/gettalong/kramdown/compare/REL_2_3_0...REL_2_3_1 web
- https://gitlab.com/gitlab-org/gitlab/-/commit/179329b5c3c118924fb242dc449d06b4ed6ccb66 web
- https://lists.fedoraproject.org/archives/list/[email protected]/message/NJCJVYHPY6LNUFM6LYZIAUIYOMVT5QGV web
- https://lists.fedoraproject.org/archives/list/[email protected]/message/S3BBLUIDCUUR3NEE4NJLOCCAV3ALQ3O6 web
- https://lists.fedoraproject.org/archives/list/[email protected]/message/SYOLQKFL6IJCQLBXV34Z4TI4O54GESPR web
- https://www.debian.org/security/2021/dsa-4890 web