CVE-2021-28834 — Unsafe Reflection in Project Kramdown

CWE-470 — Unsafe ReflectionCWE-94 — Code Injection8 documents7 sources
Severity
9.8CRITICALNVD
EPSS
2.6%
top 14.39%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
3
Kramdown Project KramdownDebian LinuxFedoraproject Fedora
Timeline
PublishedMar 19
Latest updateOct 10

Description

Kramdown before 2.3.1 does not restrict Rouge formatters to the Rouge::Formatters namespace, and thus arbitrary classes can be instantiated.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HExploitability: 3.9 | Impact: 5.9

Affected Packages2 packages

▶RubyGemskramdown_project/kramdown1.16.0 — 2.3.1

Also affects: Debian Linux 10.0, Fedora 32, 33, 34

Patches

Patch: github.com ↗Patch: gitlab.com ↗Patch: github.com ↗

🔴Vulnerability Details

4
GHSA
Remote code execution in Kramdown↗2021-03-29
▶
OSV
Remote code execution in Kramdown↗2021-03-29
▶
CVEList
CVE-2021-28834: Kramdown before 2↗2021-03-19
▶
OSV
CVE-2021-28834: Kramdown before 2↗2021-03-19
▶

📋Vendor Advisories

3
Ubuntu
kramdown vulnerability↗2023-10-10
▶
Red Hat
rubygem-kramdown: allows arbitrary classes to be instantiated↗2021-03-14
▶
Debian
CVE-2021-28834: ruby-kramdown - Kramdown before 2.3.1 does not restrict Rouge formatters to the Rouge::Formatter...↗2021
▶
CVE-2021-28834 — Unsafe Reflection in Project Kramdown | cvebase