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CVE-2016-4043

CVE-2016-4043: Chameleon in Plone allows Authentication Bypass

4.9

CVSS Score
3.0

Basic Information

CVE ID
CVE-2016-4043
GHSA ID
GHSA-6h8x-73fx-q2h9
EPSS Score
0.34787%
CWE
CWE-287
Published
5/17/2022
Updated
10/18/2024
KEV Status
No
Technology
TechnologyPython

Technical Details

CVSS Vector
CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N
Package NameEcosystemVulnerable VersionsFirst Patched Version
Plonepip>= 5.0rc1, <= 5.0.4
Plonepip= 5.1a1

Vulnerability Intelligence
Miggo AIMiggo AI

Miggo AIRoot Cause Analysis

The vulnerability stems from improper enforcement of Restricted Python in Chameleon (five.pt) when processing templates. The core issue lies in template compilation and expression evaluation logic, where the sandboxing mechanism was not applied correctly. While the exact functions are inferred (due to lack of patch details), the five.pt engine's compile method and expression evaluator are the most likely candidates, as they directly handle untrusted template code. Confidence is medium because the analysis relies on component roles rather than explicit code/commit evidence.

Vulnerable functions

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

WAF Protection Rules

WAF Rule

***m*l*on (*iv*.pt) in Plon* *.*r** t*rou** *.*** *llows r*mot* *ut**nti**t** us*rs to *yp*ss R*stri*t** Pyt*on *y l*v*r**in* p*rmissions to *r**t* or **it t*mpl*t*s.

Reasoning

T** vuln*r**ility st*ms *rom improp*r *n*or**m*nt o* R*stri*t** Pyt*on in ***m*l*on (`*iv*.pt`) w**n pro**ssin* t*mpl*t*s. T** *or* issu* li*s in t*mpl*t* *ompil*tion *n* *xpr*ssion *v*lu*tion lo*i*, w**r* t** s*n**oxin* m****nism w*s not *ppli** *or