#VU101845 Input validation error in envoy - CVE-2024-53269

Vulnerability identifier: #VU101845

Vulnerability risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:A/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2024-53269

CWE-ID: CWE-20

Exploitation vector: Local 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 user to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input when handling additional IP addresses within the Happy Eyeballs sorting algorithm implementation. A remote user can pass a string that is not an IP address and crash the server.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

envoy: 1.30.0 - 1.32.1

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External links
https://github.com/envoyproxy/envoy/pull/37743/commits/3f62168d86aceb90f743f63b50cc711710b1c401
https://github.com/envoyproxy/envoy/security/advisories/GHSA-mfqp-7mmj-rm53
https://github.com/envoyproxy/envoy/releases/tag/v1.30.9
https://github.com/envoyproxy/envoy/releases/tag/v1.31.5

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated privileged user via the local network (LAN).

Is there known malware, which exploits this vulnerability?

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