CVE-2009-2533

RealNetworks Helix Server <13.0.0 - DoS

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2009-2533. PoCs published by Core Security.

AI-analyzed exploit summary The exploit demonstrates two DoS vulnerabilities in Real Helix DNA Server (CVE-2009-2533 and CVE-2009-2534) by sending malformed RTSP requests. The first PoC sends multiple SET_PARAMETER requests with an empty DataConvertBuffer, while the second sends a malformed SETUP request missing the 0x2F character.

Description

rmserver in RealNetworks Helix Server and Helix Mobile Server before 13.0.0 allows remote attackers to cause a denial of service (daemon exit) via multiple RTSP SET_PARAMETER requests with empty DataConvertBuffer headers.

Exploits (1)

exploitdb WORKING POC VERIFIED
by Core Security · textdosmultiple
https://www.exploit-db.com/exploits/9198

The exploit demonstrates two DoS vulnerabilities in Real Helix DNA Server (CVE-2009-2533 and CVE-2009-2534) by sending malformed RTSP requests. The first PoC sends multiple SET_PARAMETER requests with an empty DataConvertBuffer, while the second sends a malformed SETUP request missing the 0x2F character.

Classification
Working Poc 100%
Attack Type
Dos
Complexity
Trivial
Reliability
Reliable
Target: Helix Server Version 12.x, Helix Mobile Server Version 12.x
No auth needed
Prerequisites: Network access to the target server on port 554 (RTSP)
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (7)

Core 7
Core References
Third Party Advisory, VDB Entry mailing-list x_refsource_bugtraq
http://www.securityfocus.com/archive/1/505083/100/0/threaded
Third Party Advisory, VDB Entry vdb-entry x_refsource_osvdb
http://osvdb.org/55981
Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/35731
Third Party Advisory vdb-entry x_refsource_vupen
http://www.vupen.com/english/advisories/2009/1947
Exploit, Third Party Advisory exploit x_refsource_exploit-db
http://www.exploit-db.com/exploits/9198

Scores

EPSS 0.0340
EPSS Percentile 87.2%

Details

CWE
CWE-20
Status published
Products (4)
realnetworks/helix_server 12.0.0
realnetworks/helix_server < 12.0.1
realnetworks/helix_server_mobile 11.0
realnetworks/helix_server_mobile < 12.0.0
Published Jul 20, 2009
Tracked Since Feb 18, 2026