HTTP: PHP gdImageCreateFromGifCtx Out of Bounds Read
An out of bounds read vulnerability has been reported in PHP. A remote attacker could exploit this vulnerability by supplying a crafted image file to an application using the affected function. Successful exploitation of this vulnerability could lead to information disclosure.
Extended Description
The GIF decoding function gdImageCreateFromGifCtx in gd_gif_in.c in the GD Graphics Library (aka libgd), as used in PHP before 5.6.31 and 7.x before 7.1.7, does not zero colorMap arrays before use. A specially crafted GIF image could use the uninitialized tables to read ~700 bytes from the top of the stack, potentially disclosing sensitive information.
Affected Products
Php php
References
CVE: CVE-2017-7890
Short Name
HTTP:PHP:PHP-OUTOFBOUND
Severity
Major
Recommended
True
Recommended Action
Drop
Category
HTTP
Keywords
Bounds CVE-2017-7890 Out PHP Read gdImageCreateFromGifCtx of
Release Date
07/27/2017
Supported Platforms
srx-branch-12.3
srx-19.3
srx-branch-19.3
vsrx3bsd-19.2
srx-branch-19.4
vsrx-19.4
mx-12.3
mx-19.4
vmx-19.4
mx-19.3
vsrx3bsd-19.4
srx-19.4
vsrx-12.3
vmx-19.3
vsrx-19.2
srx-12.3
Sigpack Version
3375
False Positive
Unknown
Vendors
Php
CVSS Score
4.3