CVE-2018-18541

Severity: high (CVSS 7.5 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.9% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2018-10-20 · updated 2026-06-17
Weakness: CWE-20

Description

In Teeworlds before 0.6.5, connection packets could be forged. There was no challenge-response involved in the connection build up. A remote attacker could send connection packets from a spoofed IP address and occupy all server slots, or even use them for a reflection attack using map download packets.

Affected products

Debian Linux: 9.0
Teeworlds: before 0.6.5 — fixed in 0.6.5

How to fix

Upgrade to a fixed version: Teeworlds 0.6.5. Check the vendor advisory for mitigations.

References

http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00046.html
http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00077.html
https://bugs.debian.org/911487
https://github.com/teeworlds/teeworlds/issues/1536
https://teeworlds.com/?page=news&id=12544
https://www.debian.org/security/2018/dsa-4329
http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00046.html
http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00077.html
https://bugs.debian.org/911487
https://github.com/teeworlds/teeworlds/issues/1536
https://teeworlds.com/?page=news&id=12544
https://www.debian.org/security/2018/dsa-4329

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