High advisory for FreeRDP from 3.17.0

Advisory overview

FreeRDP from 3.17.0 before 3.32.2 contains an assertion failure in the RemoteFX differential decoder when verbose WinPR assertions are enabled. A malicious RDP server can send a crafted RemoteFX tile with adjacent LL3 coefficients summing beyond signed 16-bit range to abort the client process.

Related references

• https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-cg4f-57hc-v7w7
• https://www.vulncheck.com/advisories/freerdp-3.17.0-before-3.32.2-denial-of-service-via-remotefx-decoder