CVE-2019-7656
What it is
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.
At a glance
- Exploitability
- Can be exploited locally on the machine with a low-privilege account. High risk of data exposure, data tampering, service disruption.
- Exploit odds
- 0.5% chance of exploitation in the next 30 days (EPSS).
- Fix
- A patch, advisory or fixed version is referenced. Upgrade or apply it.
Timeline
- PublishedDisclosed publicly on CVE.org and NVD
- Last updatedMost recent change to the record
Why it ranks here
- Exploited in the wild: no, CISA does not list it.
- Exploit odds: 0.5% in the next 30 days (EPSS).
- Severity: 7.8 HIGH (CVSS).
- Fix: a patch or advisory is linked.
Details
- Published
- Last modified
- Exploit probability
- 0.5% · EPSS, next 30 days
- Weakness
- CWE-732 · Incorrect permission assignment
- Record status
- Modified
Affected
- Wowza Streaming Engine ≤ 4.8.0
Attack profile CVSS 3.1 · 7.8
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Raw vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Is it in your code?
Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.
Read https://cve-list.com/agent/cve/CVE-2019-7656.md and follow it. Check whether this project is affected by CVE-2019-7656. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.
Fix and advisories
- https://www.wowza.com/docs/wowza-streaming-engine-4-8-5-release-notes
- https://www.wowza.com/pricing/installer
- https://www.wowza.com/docs/wowza-streaming-engine-4-8-5-release-notes
- https://www.wowza.com/pricing/installer
References
- 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
- 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