Description
When PHP EXIF extension is parsing EXIF information from an image, e.g. via exif_read_data() function, in PHP versions 7.1.x below 7.1.31, 7.2.x below 7.2.21 and 7.3.x below 7.3.8 it is possible to supply it with data what will cause it to read past the allocated buffer. This may lead to information disclosure or crash.
Remediation
References
Related Vulnerabilities
Joomla Improper Link Resolution Before File Access ('Link Following') Vulnerability (CVE-2008-4104)
Oracle Database Server CVE-2014-6454 Vulnerability (CVE-2014-6454)
OpenVPN AS Exposure of Sensitive Information to an Unauthorized Actor Vulnerability (CVE-2013-2061)
PHP Other Vulnerability (CVE-2015-6837)
WordPress Plugin Subscriber by BestWebSoft Cross-Site Scripting (1.3.4)