Improper Input Validation in net.sf.robocode:robocode.host allows for external service interaction

Description

Robocode through 1.9.3.5 allows remote attackers to cause external service interaction (DNS), as demonstrated by a query for a unique subdomain name within an attacker-controlled DNS zone, because of a .openStream call within java.net.URL.

Basic information

Type
reviewed
Severity
critical
Advisory on GitHub
Open advisory ↗
Repository advisory
Source code
Not specified
Published (advisory)
2019-04-02 15:36:49 UTC
Updated
2025-12-22 18:42:02 UTC
GitHub reviewed
2020-06-16 21:50:34 UTC
NVD published
2019-03-30

EPSS Score

Score Percentile
0.73% 72.50%

CVSS Scores

Base score Version Severity Vector
9.8 3.0
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.

Identifiers

CWEs

CWE id Name
CWE-20 Improper Input Validation
CWE-862 Missing Authorization

Affected packages (1)

Vulnerable version ranges and first patched releases as published by GitHub.

Ecosystem Package Vulnerable range First patched Vulnerable functions
maven net.sf.robocode:robocode.host <= 1.9.3.5 1.9.3.7

References

cvelogic Threat Intelligence