7.8high
CVE-2016-20033
Wowza Streaming Engine 4.5.0 Local Privilege Escalation via nssm_x64.exe
Published 7 mo ago · modified 4 mo ago · JSON
CVSS
7.8
v3.1 · CNA
CISA KEV
No
not known exploited
EPSS
0.2%
percentile 12%
Public exploits
0
none known
Summary
Wowza Streaming Engine 4.5.0 contains a local privilege escalation vulnerability that allows authenticated users to escalate privileges by replacing executable files due to improper file permissions granting full access to the Everyone group. Attackers can replace the nssm_x64.exe binary in the manager and engine service directories with malicious executables to execute code with LocalSystem privileges when services restart.
CISA SSVC assessment
- Exploitation
- Proof of concept public
- Automatable
- no
- Technical impact
- total
- Assessed
- 7 mo ago
Exploit prediction (EPSS)
0.22% probability of exploitation in the next 30 days, higher than 12% of all scored CVEs.
CVSS scores
| Assigned by | Version | Score | Vector |
|---|---|---|---|
| CNA | 4.0 | 8.5 | CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N |
| CNA | 3.1 | 7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| CNA | 4.0 | 8.5 | CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
| CNA | 3.1 | 7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Affected products
- Wowza Media Systems, LLC. Wowza Streaming Engine
Classification
- Weakness
- CWE-639 Authorization Bypass Through User-Controlled Key
References
- exploit-db.com /exploits/40132 · exploit
- zeroscience.mk /en/vulnerabilities/ZSL-2016-5339.php · vendor-advisory
- vulncheck.com /advisories/wowza-streaming-engine-local-privilege-escalation-via-nssm-x64-exe · third-party-advisory
Sources
- CVE List: CVE-2016-20033
- NVD: CVE-2016-20033
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