Resource exhaustion in envoy - CVE-2024-27919

Vulnerability identifier: #VU88180

CSH Severity: Medium

CVSS v4: 8.7 [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]

CVE-ID: CVE-2024-27919

CWE-ID: CWE-400

Exploitation vector: Remote access

Exploit availability: No public exploit available

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

The vulnerability exists due to insufficient limitations in oghttp codec placed on the amount of CONTINUATION frames that can be sent within a single HTTP/2 stream. A remote attacker can send a sequence of CONTINUATION frames without the END_HEADERS bit set causing unlimited memory consumption.

envoy
Consul
Watson CP4D Data Stores

Install update from vendor's website.

envoy - update to 1.29.2
Consul - update to 1.18.2
Watson CP4D Data Stores - update to 5.0.3

• https://github.com/envoyproxy/envoy/security/advisories/GHSA-gghf-vfxp-799r
• https://github.com/envoyproxy/envoy/commit/57a02565532c18eb9df972a3e8974be3ae59f2d5

• Remote denial of service in Envoy
• Multiple vulnerabilities in HashiCorp Consul
• IBM Watson CP4D Data Stores update for Envoy Proxy Envoy