FreeRDP before 3.32.2 Denial of Service via Oversized X.224 Routing Token

Summary

FreeRDP before 3.32.2 contains a denial of service vulnerability that allows malicious servers or unauthenticated peers to abort clients or proxies via oversized X.224 routing tokens. Attackers can send an oversized LoadBalanceInfo in a Server Redirection PDU, or a 240–247 byte token to a FixedTarget freerdp-proxy, triggering a tpdu_write_header assertion that crashes the process.

Remediation

1. Inventory every FreeRDP FreeRDP deployment, including staging.
2. Upgrade FreeRDP FreeRDP to 3.32.2.
3. Confirm the running version after the upgrade.

References

• Advisoryhttps://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-3hf9-w6hr-hf9j
• Advisoryhttps://www.vulncheck.com/advisories/freerdp-before-3.32.2-denial-of-service-via-oversized-x-224-routing-token