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CVE-2008-5911

10.0 · HIGH

Multiple buffer overflows in RealNetworks Helix Server and Helix Mobile Server 11.x before 11.1.8 and 12.x before 12.0.1 allow remote attackers to (1) cause a denial of service via three crafted RT…

Published Jan 20, 2009realnetworksCWE-119EPSS 6.19%

Overview

CVE-2008-5911 is a high-severity vulnerability affecting realnetworks helix_server. It was published on January 20, 2009 and has a CVSS 2.0 base score of 10.0 (HIGH).

This vulnerability has a CVSS 2.0 base score of 10.0, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

Multiple buffer overflows in RealNetworks Helix Server and Helix Mobile Server 11.x before 11.1.8 and 12.x before 12.0.1 allow remote attackers to (1) cause a denial of service via three crafted RTSP SETUP commands, or execute arbitrary code via (2) an NTLM authentication request with malformed base64-encoded data, (3) an RTSP DESCRIBE command, or (4) a DataConvertBuffer request.

Remediation

Check the references section for vendor advisories and patches from realnetworks. Update helix_server to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected products

VendorProductVersionsStatus

References

Refdocs.real.com/docs/security/SecurityUpdate121508HS.pdfRefsecunia.com/advisories/33360Refwww.securitytracker.com/id?1021498Refwww.securitytracker.com/id?1021499Refwww.securitytracker.com/id?1021500Refwww.securitytracker.com/id?1021501Refwww.vupen.com/english/advisories/2008/3521Refdocs.real.com/docs/security/SecurityUpdate121508HS.pdfRefsecunia.com/advisories/33360Refwww.securitytracker.com/id?1021498

How CyberStrike helps

Frequently asked questions

What is CVE-2008-5911?

CVE-2008-5911 is a high-severity vulnerability affecting realnetworks helix_server. It was published on January 20, 2009 and has a CVSS 2.0 base score of 10.0 (HIGH).

How severe is CVE-2008-5911?

This vulnerability has a CVSS 2.0 base score of 10.0, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2008-5911?

Check the references section for vendor advisories and patches from realnetworks. Update helix_server to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2008-5911?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2008-5911 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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