CVE-2019-7656
First published: Wed Jan 29 2020(Updated: )
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.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Wowza Streaming Engine | <=4.8.0 |
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Reference Links
- https://github.com/DrunkenShells/Disclosures/tree/master/CVE-2019-7656-PrivEscal-Wowza
- https://raw.githubusercontent.com/WowzaMediaSystems/public_cve/main/wowza-streaming-engine/CVE-2019-7656.txt
- https://www.wowza.com/docs/wowza-streaming-engine-4-8-5-release-notes
- https://www.wowza.com/pricing/installer
Frequently Asked Questions
What is CVE-2019-7656?
CVE-2019-7656 is a privilege escalation vulnerability in Wowza Streaming Engine 4.8.0 and earlier versions.
What is the severity of CVE-2019-7656?
CVE-2019-7656 has a severity rating of 7.8 (high).
How does CVE-2019-7656 affect Wowza Streaming Engine?
CVE-2019-7656 allows any unprivileged Linux user to escalate privileges to root on Wowza Streaming Engine 4.8.0 and earlier versions.
How can I fix CVE-2019-7656?
To fix CVE-2019-7656, you should ensure that the permissions on /usr/local/WowzaStreamingEngine/bin/* core program files are properly restricted.
Where can I find more information about CVE-2019-7656?
More information about CVE-2019-7656 can be found in the provided references: [Reference 1](https://github.com/DrunkenShells/Disclosures/tree/master/CVE-2019-7656-PrivEscal-Wowza), [Reference 2](https://raw.githubusercontent.com/WowzaMediaSystems/public_cve/main/wowza-streaming-engine/CVE-2019-7656.txt), [Reference 3](https://www.wowza.com/docs/wowza-streaming-engine-4-8-5-release-notes)
- collector/nvd-index
- vendor/wowza
- canonical/wowza streaming engine
- version/wowza streaming engine/4.8.0