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Information Exposure Affecting gd package, versions <2.2.5-r0

Severity

 Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
12.24% (96th percentile)

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  • Snyk IDSNYK-ALPINE34-GD-279286
  • published2 Aug 2017
  • disclosed2 Aug 2017
Report a new vulnerability Found a mistake?

Introduced: 2 Aug 2017

CVE-2017-7890  (opens in a new tab)
CWE-200  (opens in a new tab)

How to fix?

Upgrade Alpine:3.4 gd to version 2.2.5-r0 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream gd package and not the gd package as distributed by Alpine. See How to fix? for Alpine:3.4 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.