FreeRDP from 2.0.0-beta1 before 3.28.0 contains an out-of-bounds read vulnerability in smartcard_LocateCardsByATRA_Call because the ATR pattern cbAtr byte count is not capped. Malicious RDP servers can send crafted ATR mask arrays to use query timing as an oracle, leaking heap memory bit-by-bit to defeat ASLR and aid RCE exploits.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
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
High
Complete data leak
Integrity
None
No data modification
Availability
None
No disruption
CVSS Vector v4.0
Weakness Type (CWE)
References 3
https://github.com/FreeRDP/FreeRDP/commit/ececc5cbd0646ef012ca178322e6ef922a11f…
disclosure@vulncheck.com
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-8m97-wwx3-r8vj
disclosure@vulncheck.com
https://www.vulncheck.com/advisories/freerdp-2.0.0-beta1-before-3.28.0-out-of-b…
disclosure@vulncheck.com