Denial of service in h2o

1) Allocation of Resources Without Limits or Throttling

EUVDB-ID: #VU84978

Risk: Medium

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

CVE-ID: CVE-2023-50247

CWE-ID: CWE-770 - Allocation of Resources Without Limits or Throttling

Exploit availability: No

Description

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

The vulnerability exists due to the state exhaustion issue. A remote attacker can pass specially crafted input to the application and perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

h2o: 0.9.0 - 2.3.0 beta

CPE2.3

• cpe:2.3:a:h2o:h2o:0.9.0:*:*:*:*:*:*:*
• cpe:2.3:a:h2o:h2o:0.9.1:*:*:*:*:*:*:*
• cpe:2.3:a:h2o:h2o:0.9.2:*:*:*:*:*:*:*

External links

https://github.com/h2o/h2o/security/advisories/GHSA-2ch5-p59c-7mv6
https://github.com/h2o/h2o/commit/d67e81d03be12a9d53dc8271af6530f40164cd35

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.