SB2021063020 - Multiple vulnerabilities in Apache Traffic Server
Published: June 30, 2021
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 5 secuirty vulnerabilities.
1) Inconsistent interpretation of HTTP requests (CVE-ID: CVE-2021-32565)
The vulnerability allows a remote attacker to preform HTTP request smuggling attacks.
The vulnerability exists due to improper validation of HTTP requests when processing Content-Length header. A remote attacker can send a specially crafted HTTP request to the server and smuggle arbitrary HTTP headers.
Successful exploitation of vulnerability may allow an attacker to poison HTTP cache and perform phishing attacks.
2) Input validation error (CVE-ID: CVE-2021-27577)
The vulnerability allows a remote attacker to poison web server cache.
The vulnerability exists due to insufficient validation of user-supplied input when handling URL fragmentation. A remote attacker can send specially crafted HTTP request and poison the web server cache.
3) Input validation error (CVE-ID: CVE-2021-32566)
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 HTTP/2 requests. A remote attacker can send a specially crafted sequence of HTTP/2 frames and perform a denial of service (DoS) attack.
4) Resource management error (CVE-ID: CVE-2021-32567)
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 when processing HTTP/2 frames. A remote attacker can pass specially crafted data to the application and perform a denial of service (DoS) attack.
5) Stack-based buffer overflow (CVE-ID: CVE-2021-35474)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error within the cachekey plugin. A remote unauthenticated attacker can send specially crafted traffic to the application, trigger a stack-based buffer overflow and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Remediation
Install update from vendor's website.