CVE-2017-7890 Information
Share on: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.
CVSS Vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Reference
http://php.net/ChangeLog-5.php http://php.net/ChangeLog-7.php http://www.debian.org/security/2017/dsa-3938 http://www.securityfocus.com/bid/99492 https://access.redhat.com/errata/RHSA-2018:0406 https://access.redhat.com/errata/RHSA-2018:1296 https://bugs.php.net/bug.php?id=74435 https://bugs.php.net/patch-display.php?bug=74435&patch=fix-74435-php-7.0&revision=1497970038 https://security.netapp.com/advisory/ntap-20180112-0001/ https://www.tenable.com/security/tns-2017-12
Attack Complexity
LOW
Privileges Required
NONE
User Interaction Required
NONE
Scope
REQUIRED
Confidentiality Impact
UNCHANGED
Integrity Impact
HIGH
Availability Impact
NONE
Base Score
NONE
Base Severity
6.5