FreeRDP 3.0.0 before 3.32.0 contains a heap out-of-bounds read in freerdp_assistance_parse_all_elements_of() because it advances its parsing cursor without reducing the remaining length, letting the scan window exceed the decrypted ConnectionString2 buffer. Attackers can supply a crafted .msrcIncident invitation file and password that crash xfreerdp when opened, before any RDP connection.
Attack Parameters
Attack Vector
Local
Requires local access
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
None
No privileges needed
User Interaction
Passive
Minimal interaction
Impact Assessment
Confidentiality
None
No data leak
Integrity
None
No data modification
Availability
High
Complete denial of service
CVSS Vector v4.0
Weakness Type (CWE)
References 3
https://github.com/FreeRDP/FreeRDP/commit/2a737ce14dfee036a12d2d3e87473ace3e203…
disclosure@vulncheck.com
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-gvq8-v2fm-ffxv
disclosure@vulncheck.com
https://www.vulncheck.com/advisories/freerdp-3.0.0-before-3.32.0-heap-out-of-bo…
disclosure@vulncheck.com