Multiple buffer overflows in RealNetworks Helix Server and Helix Mobile Server 11.x…
Priority MEDIUM 52CWE-119Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- Complete · Complete · Complete
- Fix status
- No fix listed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA. Impact type from CWE-119 and the CVSS impact.
Summary
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.
Why it matters now
EPSS 0.06185 93rd percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:realnetworks:helix_server:11.0:*:*:*:*:*:*:* | 11.0 | Vulnerable | RealNetworks |
| cpe:2.3:a:realnetworks:helix_server:12.0.0:*:*:*:*:*:*:* | 12.0.0 | Vulnerable | RealNetworks |
| cpe:2.3:a:realnetworks:helix_server_mobile:11.0:*:*:*:*:*:*:* | 11.0 | Vulnerable | RealNetworks |
| cpe:2.3:a:realnetworks:helix_server_mobile:12.0.0:*:*:*:*:*:*:* | 12.0.0 | Vulnerable | RealNetworks |
- cpe:2.3:a:realnetworks:helix_server:11.0:*:*:*:*:*:*:* Versions 11.0 Vulnerable ·RealNetworks
- cpe:2.3:a:realnetworks:helix_server:12.0.0:*:*:*:*:*:*:* Versions 12.0.0 Vulnerable ·RealNetworks
- cpe:2.3:a:realnetworks:helix_server_mobile:11.0:*:*:*:*:*:*:* Versions 11.0 Vulnerable ·RealNetworks
- cpe:2.3:a:realnetworks:helix_server_mobile:12.0.0:*:*:*:*:*:*:* Versions 12.0.0 Vulnerable ·RealNetworks
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2008-5911
- 2026-10-03 Alias added: GHSA-gfhg-4w55-8q3g
References
More RealNetworks Helix Server vulnerabilities
- TI-2010-01273 Stack-based buffer overflow in the AgentX::receive_agentx function in AgentX++ 1.4.16, as… CVSS 2.0HIGH 10.0
- TI-2006-05794 Heap-based buffer overflow in Real Networks Helix Server and Helix Mobile Server before… CVSS 2.0HIGH 10.0
- TI-2010-01274 Integer overflow in the AgentX::receive_agentx function in AgentX++ 1.4.16, as used in… CVSS 2.0HIGH 10.0
- TI-2010-03985 Format string vulnerability in RealNetworks Helix Server 12.x, 13.x, and 14.x before… CVSS 2.0HIGH 10.0
- TI-2010-04321 Stack-based buffer overflow in RealNetworks Helix Server 12.x, 13.x, and 14.x before… CVSS 2.0HIGH 9.3
- TI-2012-00866 Buffer overflow in rn5auth.dll in RealNetworks Helix Server and Helix Mobile Server 14.x… CVSS 2.0HIGH 7.5
Sources
- CVE-2008-5911 · CVE Program
- CVE-2008-5911 · NVD
- FIRST EPSS
- GHSA-gfhg-4w55-8q3g · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences