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.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | robocode | 1.9.3.3-2 | — |
| Debian 13 | robocode | 1.9.3.3-2 | — |
| Debian 12 | robocode | 1.9.3.3-2 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 26.04 LTS | robocode | 1.9.3.9-4ubuntu0.26.04.1~esm1 | USN-8385-1 |
| Ubuntu Pro 24.04 LTS | robocode | 1.9.3.9-3ubuntu0.1~esm1 | USN-8385-1 |
| Ubuntu Pro 22.04 LTS | robocode | 1.9.3.9-2ubuntu0.1~esm1 | USN-8385-1 |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 20.04 LTS | robocode | 1.9.3.7-1ubuntu0.1~esm1 | USN-8385-1 |
| Ubuntu Pro 18.04 LTS | robocode | 1.9.3.1-1ubuntu0.1~esm1 | USN-8385-1 |
| Ubuntu Pro 16.04 LTS | robocode | 1.9.2.5-2ubuntu0.1~esm1 | USN-8385-1 |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Maven | net.sf.robocode:robocode.host | < 1.9.3.7 | 1.9.3.7 | GHSA-q2xp-75m7-gv52 |
Advisories 1
- USN-8385-1 robocode vulnerabilities Ubuntu Security Notices (USN) · Jun 4, 2026