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CVE-2021-46364

CVE-2021-46364: Deserialization of Untrusted Data in Magnolia CMS

7.8

CVSS Score
3.1

Basic Information

CVE ID
CVE-2021-46364
GHSA ID
GHSA-pwr6-p3fh-grc2
EPSS Score
0.76045%
CWE
CWE-502
Published
2/12/2022
Updated
2/3/2023
KEV Status
No
Technology
TechnologyJava

Technical Details

CVSS Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Package NameEcosystemVulnerable VersionsFirst Patched Version
info.magnolia:magnolia-coremaven< 6.2.46.2.4

Vulnerability Intelligence
Miggo AIMiggo AI

Miggo AIRoot Cause Analysis

The vulnerability stems from unsafe YAML deserialization using SnakeYAML's default configuration. Runtime detection would show:

  1. The core SnakeYAML load() method being called with attacker-controlled input
  2. Magnolia's YAML processing entry points that accept user-supplied YAML While exact patch details are unavailable, the PoC and vulnerability nature indicate these functions would appear in stack traces during exploitation when malicious YAML is processed.

Vulnerable functions

Only Mi**o us*rs **n s** t*is s**tion

WAF Protection Rules

WAF Rule

* vuln*r**ility in t** Sn*k* Y*ML p*rs*r o* M**noli* *MS v*.*.* *n* **low *llows *tt**k*rs to *x**ut* *r*itr*ry *o** vi* * *r**t** Y*ML *il*.

Reasoning

T** vuln*r**ility st*ms *rom uns*** Y*ML **s*ri*liz*tion usin* Sn*k*Y*ML's ****ult *on*i*ur*tion. Runtim* **t**tion woul* s*ow: *. T** *or* Sn*k*Y*ML lo**() m*t*o* **in* **ll** wit* *tt**k*r-*ontroll** input *. M**noli*'s Y*ML pro**ssin* *ntry points