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CVE-2018-20433

CVE-2018-20433: XML External Entity Reference in mchange:c3p0

9.8

CVSS Score
3.0

Basic Information

CVE ID
CVE-2018-20433
GHSA ID
GHSA-q485-j897-qc27
EPSS Score
0.84825%
CWE
CWE-611
Published
1/7/2019
Updated
1/9/2023
KEV Status
No
Technology
TechnologyJava

Technical Details

CVSS Vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Package NameEcosystemVulnerable VersionsFirst Patched Version
com.mchange:c3p0maven<= 0.9.5.20.9.5.3

Vulnerability Intelligence
Miggo AIMiggo AI

Miggo AIRoot Cause Analysis

The vulnerability stems from insecure XML parsing in extractXmlConfigFromInputStream. The commit diff shows the patch adds 'fact.setExpandEntityReferences(false)' to mitigate XXE, confirming the vulnerable code path. The CWE-611 classification and advisory descriptions explicitly reference this function as the entry point for the vulnerability during XML configuration parsing.

Vulnerable functions

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

WAF Protection Rules

WAF Rule

**p* *.*.*.* *llows XX* in *xtr**tXml*on*i**romInputStr**m in *om/m***n**/v*/**p*/***/**P**on*i*XmlUtils.j*v* *urin* initi*liz*tion.

Reasoning

T** vuln*r**ility st*ms *rom ins**ur* XML p*rsin* in `*xtr**tXml*on*i**romInputStr**m`. T** *ommit *i** s*ows t** p*t** ***s '***t.s*t*xp*n**ntityR***r*n**s(**ls*)' to miti**t* XX*, *on*irmin* t** vuln*r**l* *o** p*t*. T** *W*-*** *l*ssi*i**tion *n*