SB2020042404 - Amazon Linux AMI update for http-parser

Description

This security bulletin contains information about 3 secuirty vulnerabilities.

1) Heap-based buffer overflow (CVE-ID: CVE-2018-12121)

The disclosed vulnerability allows a remote attacker to cause DoS condition on the target system.

The vulnerability exists due to heap-based buffer overflow. A remote attacker can send many requests with the maximum size HTTP header of nearly 80kb/connection in combination with carefully handled completion of those headers, trigger memory corruption and cause the Node.js HTTP server to abort.

2) HTTP response splitting (CVE-ID: CVE-2018-7159)

The vulnerability allows a remote attacker to write arbitrary files on the target system.

The weakness exists due to spaces in Content-Length HTTP headers from Node.js’s HTTP module entirely ignore spaces within the value, despite the HTTP specification not allowing spaces within the values. A remote attacker can confuse the script and write arbitrary files.

3) HTTP request smuggling (CVE-ID: CVE-2019-15605)

The vulnerability allows a remote attacker to perform HTTP request smuggling attack.

The vulnerability exists due to insufficient validation of Transfer-Encoding header. A remote attacker can send a specially crafted HTTP request to the application and perform a request smuggling attack.

Remediation

Install update from vendor's website.

References

• https://alas.aws.amazon.com/ALAS-2020-1359.html