SB2024021235 - Red Hat Enterprise Linux 8 update for the squid:4 module
Published: February 12, 2024
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 6 secuirty vulnerabilities.
1) Improper Handling of Structural Elements (CVE-ID: CVE-2023-5824)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to improper handling of structural elements in HTTP response caching. A remote user can cause a denial of service condition on the target system.
2) Improper Certificate Validation (CVE-ID: CVE-2023-46724)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to improper input validation when processing a specially crafted SSL Certificate in a server certificate chain. A remote attacker can initiate a TLS Handshake with a specially crafted SSL certificate and perform a denial of service (DoS) attack.
3) NULL pointer dereference (CVE-ID: CVE-2023-46728)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a NULL pointer dereference error in Gopher gateway. A remote attacker can pass specially crafted data to the server and perform a denial of service (DoS) attack.
4) Out-of-bounds read (CVE-ID: CVE-2023-49285)
The vulnerability allows a remote attacker perform a denial of service (DoS) attack.
The vulnerability exists due to a boundary condition when handling HTTP messages. A remote attacker can send specially crafted data to the server, trigger an out-of-bounds read error and crash the proxy server.
5) Unchecked Return Value (CVE-ID: CVE-2023-49286)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to incorrect check of function return value in Helper process management. A remote attacker can pass specially crafted data to the proxy server and perform a denial of service (DoS) attack.
6) Uncontrolled Recursion (CVE-ID: CVE-2023-50269)
The vulnerability allows a remote client to perform a denial of service (DoS) attack.
The vulnerability exists due to uncontrolled recursion when parsing HTTP requests. A remote client can send a specially crafted HTTP request with the a large X-Forwarded-For header, when the follow_x_forwarded_for feature is configured, and perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.