High advisory for Freerdp

Advisory overview

FreeRDP before 3.32.2 contains a heap-based buffer overflow in the RD Gateway RPC client, where rpc_client_recv_fragment writes BIND_ACK and ALTER_CONTEXT_RESP fragments into a persistent PDU stream after checking only total capacity rather than remaining capacity from the current stream position. A malicious or compromised RD Gateway can send crafted RPC fragments with manipulated alloc_hint and frag_length values to overwrite client heap memory with attacker-controlled data, causing a crash or potentially arbitrary code execution.

Related references

• https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-q82v-5wjg-6h57
• https://www.vulncheck.com/advisories/freerdp-before-3.32.2-heap-buffer-overflow-via-rpc-client-recv-fragment
• https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-q82v-5wjg-6h57