SB2020090113 - Amazon Linux AMI update for httpd24
Published: September 1, 2020 Updated: July 3, 2025
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 3 secuirty vulnerabilities.
1) Buffer overflow (CVE-ID: CVE-2020-11984)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error in od_proxy_uwsgi module. A remote attacker can send a specially crafted request to the web server, trigger memory corruption and gain access to sensitive information or execute arbitrary code on the target system.
2) Resource management error (CVE-ID: CVE-2020-11993)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to improper management of internal resources within the application while processing HTTP/2 requests with enabled trace/debug for HTTP/2 connections. A remote attacker can send specially crafted HTTP/2 requests to Apache HTTP Server and force it to make logging statements on wrong connection for certain traffic edge patterns. This results in concurrent use of memory pools for separate connections and triggers denial of service condition.
3) Input validation error (CVE-ID: CVE-2020-9490)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to insufficient validation of user-supplied input when processing Cache-Digest header in HTTP/2 request. A remote attacker can pass specially crafted HTTP/2 request to the Apache HTTP Server, trigger the server to send the HTTP/2
PUSH and perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.