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地图 / HEIC image preview can be used to invoke Imagick

HEIC image preview can be used to invoke Imagick

信息泄露 / 信息泄露 / #1261413

厂商
Nextcloud
严重程度
高危
赏金
—
弱点
信息泄露
研究员
@lukasreschkenc
披露日期
2023-01-07
资产
nextcloud/server
CVE
CVE-2021-32802

该报告还没有中文解读。

原文摘录

摘自原文(1178 字符中的一小部分)
The HEIC image preview provider calls into Imagick at https://github.com/nextcloud/server/blob/5d097ddb4b99673f57b8c085dedd93880ee2539d/lib/private/Preview/HEIC.php#L98-L109. This is bad as Imagick processes all kind of image types.
原文中的代码
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<svg
   xmlns:svg="http://www.w3.org/2000/svg"
   xmlns="http://www.w3.org/2000/svg"
   xmlns:xlink="http://www.w3.org/1999/xlink"
   style="overflow: hidden; position: relative;"
   width="500"
   height="500">
    <image x="0" y="0" …

默认不展示报告全文。以上为简短摘录,完整复现过程请阅读原文。版权归研究员与 Nextcloud 所有。

时间线

  • 报告提交
  • 公开披露
阅读 HackerOne 原文 ↗作者 @lukasreschkenc · 版权归作者与 Nextcloud 所有

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