#VU91154 Use-after-free in envoy - CVE-2024-32974

Vulnerability identifier: #VU91154

Vulnerability risk: Medium

CVSSv4.0: 6.9 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P/U:Green]

CVE-ID: CVE-2024-32974

CWE-ID: CWE-416

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 due to a use-after-free error in EnvoyQuicServerStream::OnInitialHeadersComplete() function. A remote attacker can cause a denial of service condition on the target system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

envoy: 1.0.0, 1.1.0 - 1.19.5, 1.2.0 - 1.29.4, 1.3.0 - 1.30.1, 1.4.0, 1.5.0, 1.6.0, 1.7.0 - 1.7.1, 1.8.0, 1.9.0 - 1.9.1

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External links
https://github.com/envoyproxy/envoy/security/advisories/GHSA-mgxp-7hhp-8299

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Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.