#VU101847 NULL pointer dereference in envoy - CVE-2024-53270

Vulnerability identifier: #VU101847

Vulnerability 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-2024-53270

CWE-ID: CWE-476

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 NULL pointer dereference error during the H/2 upstream reset. A remote attacker can pass specially crafted data to the application and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

envoy: 1.29.0 - 1.29.11, 1.30.0 - 1.32.2

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External links
https://github.com/envoyproxy/envoy/pull/37743/commits/6cf8afda956ba67c9afad185b962325a5242ef02
https://github.com/envoyproxy/envoy/security/advisories/GHSA-q9qv-8j52-77p3
https://github.com/envoyproxy/envoy/releases/tag/v1.29.12
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 non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

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