#VU16916 Out-of-bounds write in PHP - CVE-2019-6977
Published: January 10, 2019 / Updated: June 17, 2021
Vulnerability identifier: #VU16916
Vulnerability risk: High
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Amber
CVE-ID: CVE-2019-6977
CWE-ID: CWE-787
Exploitation vector: Remote access
Exploit availability:
Public exploit is available
Vulnerable software:
PHP
PHP
Software vendor:
PHP Group
PHP Group
Description
The vulnerability allows a remote attacker to execute arbitrary on the target system.
The weakness exists due to out-of-bounds write in imagecolormatch. A remote attacker can write up to 1200 bytes over the boundaries of a buffer allocated in the imagecolormatch function, which then calls gdImageColorMatch() and execute arbitrary code with elevated privileges.
The weakness exists due to out-of-bounds write in imagecolormatch. A remote attacker can write up to 1200 bytes over the boundaries of a buffer allocated in the imagecolormatch function, which then calls gdImageColorMatch() and execute arbitrary code with elevated privileges.
Remediation
The vulnerability has been fixed in the versions 5.6.40, 7.1.26, 7.2.14, 7.3.1.