PT-2021-20932 · Wowza · Wowza Streaming Engine

Massimiliano Brolli + 1 · Published 2021-10-05 · Updated 2022-07-12 · CVE-2021-35492

Positive Technologies (AI Summary)

CVSS v3.1

6.5

Medium

Base vector

AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions: Wowza Streaming Engine versions 4.8.11+5 and earlier

Description: The issue allows an authenticated, remote attacker to exhaust filesystem resources via the "/enginemanager/server/vhost/historical.jsdata" vhost parameter. This is due to the insufficient management of available filesystem resources. An attacker could exploit this by requesting random virtual-host historical data through the Virtual Host Monitoring section, causing database errors and making the device unresponsive to web-based management. Manual intervention is required to free filesystem resources and return the application to an operational state.

Recommendations: For Wowza Streaming Engine versions 4.8.11+5 and earlier, as a temporary workaround, consider restricting access to the "/enginemanager/server/vhost/historical.jsdata" endpoint to minimize the risk of exploitation. Additionally, limit the vhost parameter usage in the Virtual Host Monitoring section until a patch is available. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Allocation of Resources Without Limits

Weakness Enumeration

CWE-770

Related Identifiers

CVE-2021-35492

Affected Products

Wowza Streaming Engine

References · 6

• 🔥 https://gruppotim.it/redteam · Exploit
• https://wowza.com/docs/wowza-streaming-engine-4-8-14-release-notes · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-35492 · Security Note
• https://osv.dev/vulnerability/CVE-2021-35492 · Vendor Advisory
• https://n4nj0.github.io/advisories/wowza-streaming-engine-i · Note
• https://t.me/cibsecurity/29997 · Telegram Post