Medium: amazon-cloudwatch-agent

Issue Overview:

An attacker may cause an HTTP/2 endpoint to read arbitrary amounts of header data by sending an excessive number of CONTINUATION frames. Maintaining HPACK state requires parsing and processing all HEADERS and CONTINUATION frames on a connection. When a request’s headers exceed MaxHeaderBytes, no memory is allocated to store the excess headers, but they are still parsed. This permits an attacker to cause an HTTP/2 endpoint to read arbitrary amounts of header data, all associated with a request which is going to be rejected. These headers can include Huffman-encoded data which is significantly more expensive for the receiver to decode than for an attacker to send. The fix sets a limit on the amount of excess header frames we will process before closing a connection. (CVE-2023-45288)

The protojson.Unmarshal function can enter an infinite loop when unmarshaling certain forms of invalid JSON. This condition can occur when unmarshaling into a message which contains a google.protobuf.Any value, or when the UnmarshalOptions.DiscardUnknown option is set. (CVE-2024-24786)

Affected Packages:

amazon-cloudwatch-agent

Note:

This advisory is applicable to Amazon Linux 2 (AL2) Core repository. Visit this FAQ section for the difference between AL2 Core and AL2 Extras advisories.

Issue Correction:
Run yum update amazon-cloudwatch-agent to update your system.

New Packages:

aarch64:  
    amazon-cloudwatch-agent-1.300039.0-1.amzn2.aarch64  
  
src:  
    amazon-cloudwatch-agent-1.300039.0-1.amzn2.src  
  
x86_64:  
    amazon-cloudwatch-agent-1.300039.0-1.amzn2.x86_64  

Additional References

Red Hat: CVE-2023-45288, CVE-2024-24786

Mitre: CVE-2023-45288, CVE-2024-24786