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CVE-2019-7656

7.8 · HIGH

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, 2020CWE-732EPSS 0.45%

Overview

CVE-2019-7656 is a high-severity vulnerability. It was published on January 29, 2020 and has a CVSS 3.1 base score of 7.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/DrunkenShells/Disclosures/tree/master/CVE-2019-7656-PrivEscal-WowzaRefraw.githubusercontent.com/WowzaMediaSystems/public_cve/main/wowza-streaming-engine/CVE-2019-7656.txtRefwww.wowza.com/docs/wowza-streaming-engine-4-8-5-release-notesRefwww.wowza.com/pricing/installerGitHubgithub.com/DrunkenShells/Disclosures/tree/master/CVE-2019-7656-PrivEscal-WowzaRefraw.githubusercontent.com/WowzaMediaSystems/public_cve/main/wowza-streaming-engine/CVE-2019-7656.txtRefwww.wowza.com/docs/wowza-streaming-engine-4-8-5-release-notesRefwww.wowza.com/pricing/installer

How CyberStrike helps

Frequently asked questions

What is CVE-2019-7656?

CVE-2019-7656 is a high-severity vulnerability. It was published on January 29, 2020 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2019-7656?

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2019-7656?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2019-7656?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2019-7656 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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