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.
References (4)
Core 4
Core References
Vendor Advisory x_refsource_misc
https://www.wowza.com/pricing/installer
Exploit, Third Party Advisory x_refsource_misc
https://github.com/DrunkenShells/Disclosures/tree/master/CVE-2019-7656-PrivEscal-Wowza
Release Notes, Vendor Advisory x_refsource_confirm
https://www.wowza.com/docs/wowza-streaming-engine-4-8-5-release-notes
Third Party Advisory x_refsource_misc
https://raw.githubusercontent.com/WowzaMediaSystems/public_cve/main/wowza-streaming-engine/CVE-2019-7656.txt
Scores
CVSS v3
7.8
EPSS
0.0008
EPSS Percentile
24.5%
Attack Vector
LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Details
CWE
CWE-732
Status
published
Products (1)
wowza/streaming_engine
< 4.8.0
Published
Jan 29, 2020
Tracked Since
Feb 18, 2026