Vulnerability in Wowza Streaming Engine
CVE-2019-7656
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.005 (36.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 37th percentile — 36.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
Weakness classification (CWE)
References
- www.wowza.com/pricing/installer (Vendor Advisory)
- github.com/DrunkenShells/Disclosures/tree/master/CVE-2019-7656-PrivEscal-Wowza (Exploit, Third Party Advisory)
- www.wowza.com/docs/wowza-streaming-engine-4-8-5-release-notes (Release Notes, Vendor Advisory)
- raw.githubusercontent.com/WowzaMediaSystems/public_cve/main/wowza-streaming-eng… (Third Party Advisory)
Frequently asked questions
- What is CVE-2019-7656?
- CVE-2019-7656 is a high-severity vulnerability in Wowza Streaming Engine, classified under Incorrect Permission Assignment for Critical Resource. CVSS score: 7.8/10. Published 2020-01-29.
- How severe is CVE-2019-7656?
- High severity. CVSS v3 base score is 7.8 out of 10.