A privilege escalation vulnerability in Wowza Streaming Engine 4.8.0 and earlier allows any unprivileged Linux user to escalate privileges to root
Published Jan 29, 2020
7.8
HIGHCVSS 3.1
EPSS 0.45%
Description
A privilege escalation vulnerability in Wowza Streaming Engine 4.8.0 and earlier allows any unprivileged Linux user to escalate privileges to root. The installer sets too relaxed permissions on /usr/local/WowzaStreamingEngine/bin/* core program files. By injecting a payload into one of those files, it will run with the same privileges as the Wowza server, root. For example, /usr/local/WowzaStreamingEngine/bin/tune.sh could be replaced with a Trojan horse. This issue was resolved in Wowza Streaming Engine 4.8.5.
Affected products
No data.
- ≤ 4.8.0
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
No CVSS v3.0 score for this CVE.
AV:L/AC:L/Au:N/C:C/I:C/A:C
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
- EPSS v4
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
- EPSS v4
Table of values (12 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.45% (0.00451) | 36.87th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.45% (0.00451) | 35.62th | v5 (v2026.06.15) |
| May 4, 2025 | 0.03% (0.00034) | 8.60th | v4 (v2025.03.14) |
| Jul 20, 2024 | 0.08% (0.00080) | 34.79th | v3 (v2023.03.01) |
| Jul 2, 2024 | 0.08% (0.00080) | 34.61th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.08% (0.00080) | 32.60th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.95% (0.00950) | 32.28th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.67% (0.01669) | 53.27th | v2 (v2022.01.01) |
| Feb 3, 2022 | 4.50% (0.04504) | 76.47th | v1 |
| Jan 6, 2022 | 4.50% (0.04504) | 76.26th | v1 |
| Jan 5, 2022 | 1.04% (0.01040) | 65.70th | v5 (v2026.06.15) |
| Apr 14, 2021 | 1.04% (0.01040) | 0.00th | v1 |
References (4)
- https://github.com/DrunkenShells/Disclosures/tree/master/CVE-2019-7656-PrivEscal-Wowza x_refsource_MISCExploitThird Party Advisory
- https://raw.githubusercontent.com/WowzaMediaSystems/public_cve/main/wowza-streaming-engine/CVE-2019-7656.txt x_refsource_MISCThird Party Advisory
- https://www.wowza.com/docs/wowza-streaming-engine-4-8-5-release-notes x_refsource_CONFIRMRelease NotesVendor Advisory
- https://www.wowza.com/pricing/installer x_refsource_MISCVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| https://github.com/DrunkenShells/Disclosures/tree/master/CVE-2019-7656-PrivEscal-Wowza | x_refsource_MISCExploitThird Party Advisory | |
| https://raw.githubusercontent.com/WowzaMediaSystems/public_cve/main/wowza-streaming-engine/CVE-2019-7656.txt | x_refsource_MISCThird Party Advisory | |
| https://www.wowza.com/docs/wowza-streaming-engine-4-8-5-release-notes | x_refsource_CONFIRMRelease NotesVendor Advisory | |
| https://www.wowza.com/pricing/installer | x_refsource_MISCVendor Advisory |
Change history (0)
No recorded changes yet.