CVE-2017-7890

CVE Details

Release Date:	2018-03-07
Impact:	None	What is this?

Description

The GIF decoding function gdImageCreateFromGifCtx in gd_gif_in.c inthe 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.

See more information about CVE-2017-7890 from MITRE CVE dictionary and NIST NVD

NOTE: The following CVSS metrics and score provided are preliminary and subject to review.

CVSS v2 metrics

Base Score:	4.3
Vector String:	AV:N/AC:M/Au:N/C:P/I:N/A:N
Version:	2.0
Attack Vector:	Network
Attack Complexity:	Medium
Authentication:	None
Confidentiality Impact:	Partial
Integrity Impact:	None
Availability Impact:	None

Errata information

Platform	Errata	Release Date
Oracle Linux version 7 (php)	ELSA-2018-0406	2018-03-07