#VU93520 Use-after-free in envoy - CVE-2024-39305

Vulnerability identifier: #VU93520

Vulnerability risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2024-39305

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 compromise vulnerable system.

The vulnerability exists due to a use-after-free error when route hash policy is configured with cookie attributes. A remote attacker can gain access to sensitive information on the system or perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

envoy: 1.27.6 - 1.29.6, 1.30.3

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External links
https://github.com/envoyproxy/envoy/security/advisories/GHSA-fp35-g349-h66f

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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.