SB2020031403 - Amazon Linux AMI update for php73
Published: March 14, 2020
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 3 secuirty vulnerabilities.
1) Heap-based buffer overflow (CVE-ID: CVE-2020-7061)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error within the phar_extract_file() function. A remote attacker can pass specially crafted file to the application, trigger a heap-based buffer overflow and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
2) NULL pointer dereference (CVE-ID: CVE-2020-7062)
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 session.c when handling file uploads. A remote attacker can send a specially crafted HTTP POST request to the affected application and perform a denial of service (DoS) attack.
3) Incorrect default permissions (CVE-ID: CVE-2020-7063)
The vulnerability allows a local user to gain access to sensitive information.
The vulnerability exists due to incorrect default permissions for files and folders that are set during the Phar::buildFromIterator() call when adding files into tar archive. A local user can extract files from tar archive and gain access to otherwise restricted information.
Remediation
Install update from vendor's website.