Vulnerability identifier: #VU74476

Vulnerability risk: Medium

CVSSv3.1: 4.2 [CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-27492

CWE-ID: CWE-770

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
envoy
Server applications / IDS/IPS systems, Firewalls and proxy servers

Vendor: Cloud Native Computing Foundation

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists when a large request body is processed in Lua filter. A remote user can pass specially crafted input to the application and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

envoy: 1.0.0 - 1.25.3

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External links
http://github.com/envoyproxy/envoy/security/advisories/GHSA-wpc2-2jp6-ppg2
http://github.com/envoyproxy/envoy/releases/tag/v1.25.4
http://github.com/envoyproxy/envoy/releases/tag/v1.24.5
http://github.com/envoyproxy/envoy/releases/tag/v1.23.7
http://github.com/envoyproxy/envoy/releases/tag/v1.22.10

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.