Denial of service in Envoy

1) Resource exhaustion

EUVDB-ID: #VU88181

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2024-30255

CWE-ID: CWE-400 - Resource exhaustion

Exploit availability: No

Description

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

The vulnerability exists due to insufficient limitations placed on the amount of CONTINUATION frames that can be sent within a single HTTP/2 stream. A remote attacker can send specially crafted HTTP/2 requests to the server and perform a denial of service (DoS) attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

envoy: 1.0.0 - 1.29.2

CPE2.3

• cpe:2.3:a:cncf:envoy:1.0.0:*:*:*:*:*:*:*
• cpe:2.3:a:cncf:envoy:1.19.5:*:*:*:*:*:*:*
• cpe:2.3:a:cncf:envoy:1.29.2:*:*:*:*:*:*:*
• cpe:2.3:a:cncf:envoy:1.3.0:*:*:*:*:*:*:*
• cpe:2.3:a:cncf:envoy:1.4.0:*:*:*:*:*:*:*
• cpe:2.3:a:cncf:envoy:1.5.0:*:*:*:*:*:*:*
• cpe:2.3:a:cncf:envoy:1.6.0:*:*:*:*:*:*:*
• cpe:2.3:a:cncf:envoy:1.7.1:*:*:*:*:*:*:*
• cpe:2.3:a:cncf:envoy:1.8.0:*:*:*:*:*:*:*
• cpe:2.3:a:cncf:envoy:1.9.1:*:*:*:*:*:*:*

External links

https://github.com/envoyproxy/envoy/security/advisories/GHSA-j654-3ccm-vfmm

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

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