CVE-2008-5911
Multiple buffer overflows in RealNetworks Helix Server and Helix Mobile Server 11.x before 11.1.8...
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.
Exploit likelihood
What each source reports
NVD Score used
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.
- Record
CVE-2008-5911- CVSS 2.0
- 10.0 High
AV:N/AC:L/Au:N/C:C/I:C/A:C - Weakness
- CWE-119
- Updated
- 2026-11-02
CVE List No score
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.
- Record
CVE-2008-5911- Updated
- 2026-11-02
EUVDEUVD-2008-5881 No score
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.
- Record
EUVD-2008-5881- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-gfhg-4w55-8q3g No score
Multiple buffer overflows in RealNetworks Helix Server and Helix Mobile Server 11.x before 11.1.8...
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.
- Record
GHSA-gfhg-4w55-8q3g- Weakness
- CWE-119
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2008-5911 is a high vulnerability (CVSS 10.0) in Realnetworks Helix Server, published January 20, 2009. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 6.19%, the 93rd percentile. No source names a fixed version.
References
securitytracker.com/id?1021500
secunia.com/advisories/33360
docs.real.com/docs/security/SecurityUpdate121508HS.pdf
vupen.com/english/advisories/2008/3521
nvd.nist.gov/vuln/detail/CVE-2008-5911
github.com/advisories/GHSA-gfhg-4w55-8q3g