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Information Exposure Affecting libgd2 package, versions <2.2.4-2+deb9u1

0.0
medium

Snyk CVSS

    Attack Complexity Low
    User Interaction Required
    Confidentiality High

    Threat Intelligence

    EPSS 29.79% (97th percentile)
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NVD
6.5 medium
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Red Hat
5.5 medium

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  • Snyk ID SNYK-DEBIAN9-LIBGD2-383050
  • published 2 Aug 2017
  • disclosed 2 Aug 2017
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Introduced: 2 Aug 2017

CVE-2017-7890 Open this link in a new tab
CWE-200 Open this link in a new tab

How to fix?

Upgrade Debian:9 libgd2 to version 2.2.4-2+deb9u1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libgd2 package and not the libgd2 package as distributed by Debian. See How to fix? for Debian:9 relevant fixed versions and status.

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.