Access Restriction Bypass Affecting net.sourceforge.plantuml:plantuml package, versions [,1.2023.9)


Severity

Recommended
0.0
medium
0
10

CVSS assessment by Snyk's Security Team. Learn more

Threat Intelligence

Exploit Maturity
Proof of Concept
EPSS
0.87% (55th percentile)

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  • Snyk IDSNYK-JAVA-NETSOURCEFORGEPLANTUML-5741890
  • published28 Jun 2023
  • disclosed27 Jun 2023
  • creditZhang Zeyu

Introduced: 27 Jun 2023

CVE-2023-3431  (opens in a new tab)
CWE-284  (opens in a new tab)

How to fix?

Upgrade net.sourceforge.plantuml:plantuml to version 1.2023.9 or higher.

Overview

Affected versions of this package are vulnerable to Access Restriction Bypass that allows attackers to read files on the server using %load_json, when ALLOW_PLANTUML_INCLUDE=false is set (the default).

PoC

@startuml
Bob -> Alice : %load_json("/var/lib/jetty/test.json")
@enduml

References

CVSS Base Scores

version 3.1