Arbitrary file read via backslash URL normalization
Published Dec 18, 2024 · Updated Dec 18, 2024
Path traversal in Spatie Browsershot before 5.0.2 allows remote attackers to read arbitrary server files through a crafted URL. The setUrl method blocks file:// and file:/ prefixes but passes backslash-prefixed file URLs, which Chrome normalizes into local file URLs. Exploitation requires a consuming application to pass attacker-controlled input to Browsershot::url; successful requests expose files readable by the application process.
Summary
What happened
Path traversal in Spatie Browsershot before 5.0.2 allows remote attackers to read arbitrary server files through a crafted URL. The setUrl method blocks file:// and file:/ prefixes but passes backslash-prefixed file URLs, which Chrome normalizes into local file URLs. Exploitation requires a consuming application to pass attacker-controlled input to Browsershot::url; successful requests expose files readable by the application process.
The record
- CVE
- CVE-2024-21547
- Published
- Dec 18, 2024
- Updated
- Dec 18, 2024
- Vendor
- Spatie
- Product
- Browsershot
- Classifications
- CWE-22, T1005
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Dec 18, 2024CVE publishedPublication date reported by the CVE source.
- Dec 18, 2024Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0 <5.0.2
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- Snyk Browsershot backslash file-URL proof of conceptproof of concept · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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