CVE-2017-7890

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    CVE-2017-7890

    Published: 2 Aug 2017Last Modified: 7 Aug 2026

    Summary:

    Details: 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.

    References: https://www.tenable.com/security/tns-2017-12, 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://security.netapp.com/advisory/ntap-20180112-0001/, 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

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    7.0.0
    7.0.1
    7.0.10
    7.0.11
    7.0.12
    7.0.13
    7.0.14
    7.0.15
    7.0.16
    7.0.17
    7.0.18
    7.0.19
    7.0.2
    7.0.20
    7.0.3
    7.0.4
    7.0.5
    7.0.6
    7.0.7
    7.0.8
    7.0.9

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High