fhir-proxy | 3 apache vulnerabilities fixed in apache 2.4.59

[christiangierschner]

Hi,

there are 3 apache vulnerabilities fixed in apache 2.4.59

CVE-2023-38709
CVE-2024-24795
CVE-2024-27316

2.4.58 is used in fhir-proxy

Could you please update apache to 2.4.59 or offer a mitigation or give an vulnerablility assessment.

thanks..

Christian

[hhund]

Hi @christiangierschner,

thanks for the report. Based on available information we do not need to release a new version immediately. But since information on how to exploit these vulnerabilities is currently sparse, we will likely create a maintenance release shortly anyways.

CVE-2023-38709

Faulty input validation in the core of Apache allows malicious or exploitable backend/content generators to split HTTP responses.

The fhir-proxy module only communicates with our fhir application server.

CVE-2024-24795

HTTP Response splitting in multiple modules in Apache HTTP Server allows an attacker that can inject malicious response headers into backend applications to cause an HTTP desynchronization attack.

The fhir application server does not send any HTTP response headers with user controlled data.

CVE-2024-27316

HTTP/2 incoming headers exceeding the limit are temporarily buffered in nghttp2 in order to generate an informative HTTP 413 response. If a client does not stop sending headers, this leads to memory exhaustion.

The http2 module is not loaded.