CVE-2026-33977

Published: Mar 31, 2026 Last Modified: Mar 31, 2026
ExploitDB:
Other exploit source:
Google Dorks:
MEDIUM 6,9
Source: [email protected]
Attack Vector: network
Attack Complexity: low
Privileges Required: none
User Interaction: active
Confidentiality: N/A
Integrity: N/A
Availability: N/A

Description

AI Translation Available

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.24.2, a malicious RDP server can crash the FreeRDP client by sending audio data in IMA ADPCM format with an invalid initial step index value (>= 89). The unvalidated step index is read directly from the network and used to index into a 89-entry lookup table, triggering a WINPR_ASSERT() failure and process abort via SIGABRT. This affects any FreeRDP client that has audio redirection (RDPSND) enabled, which is the default configuration. This issue has been patched in version 3.24.2.

617

Reachable Assertion

Draft
Abstraction: Base Structure: Simple
Common Consequences
Security Scopes Affected:
Availability
Potential Impacts:
Dos: Crash, Exit, Or Restart
Applicable Platforms
Languages: C, Java, Not Language-Specific, Rust
View CWE Details
https://github.com/FreeRDP/FreeRDP/commit/9be3f03d94a50892f…
https://github.com/FreeRDP/FreeRDP/commit/9be3f03d94a50892fd58a9f7dee72b2313c69…
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA…
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-8f2g-3q27-6xm5