SB2020051427 - Amazon Linux AMI update for php73
Published: May 14, 2020
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 4 secuirty vulnerabilities.
1) Out-of-bounds read (CVE-ID: CVE-2020-7064)
The vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to a boundary condition within exif_read_data() PHP function. A remote attacker can pass specially crafted data to the application that uses the vulnerable function, trigger one byte out-of-bounds read error and read contents of memory on the system.
2) Stack-based buffer overflow (CVE-ID: CVE-2020-7065)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error within php_unicode_tolower_full() function, as demonstrated by the mb_strtolower() call. A remote attacker can pass specially crafted data to the application that uses affected function, trigger 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.
3) Input validation error (CVE-ID: CVE-2020-7066)
The vulnerability allows a remote attacker to bypass certain security restrictions.
The vulnerability exists due to get_headers() PHP function silently truncates headers after receiving a NULL byte character. A remote attacker can abuse this behavior to bypass implemented security restrictions with in the application.
4) Out-of-bounds read (CVE-ID: CVE-2020-7067)
The vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to a boundary condition when processing untrusted input passed to urldecode() PHP function. A remote attacker can send specially crafted data to the application that uses the affected function and gain access to sensitive information on the system
Remediation
Install update from vendor's website.