#VU11789 Information disclosure in PHP - CVE-2017-7890
Published: April 9, 2018 / Updated: April 12, 2018
Vulnerability identifier: #VU11789
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2017-7890
CWE-ID: CWE-200
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
PHP
PHP
Software vendor:
PHP Group
PHP Group
Description
The vulnerability allows a remote attacker to obtain potentially sensitive information.
The weakness exists in the GIF decoding function gdImageCreateFromGifCtx in gd_gif_in.c due to it does not zero colorMap arrays before use. A remote attacker can trick the victim into opening a specially crafted GIF image that could use the uninitialized tables to read ~700 bytes from the top of the stack and gain access to potentially sensitive information.
Remediation
Update to versions 5.6.31 or 7.1.7.