File extension spoofing via unescaped attachment filename
Published Jun 8, 2023 · Updated Jan 6, 2025
Improper input validation in Gin before 1.9.1 allows remote attackers to spoof a downloaded file's name through a crafted attachment filename. Context.FileAttachment inserts an ASCII filename into a quoted Content-Disposition parameter without escaping double quotes, so a quote terminates the intended value and injects a different name or parameter. Exposure requires an application to supply an attacker-controlled filename and a user to download the response; the demonstrated consequence is file-name or extension spoofing, not server-side file access.
Summary
What happened
Improper input validation in Gin before 1.9.1 allows remote attackers to spoof a downloaded file's name through a crafted attachment filename. Context.FileAttachment inserts an ASCII filename into a quoted Content-Disposition parameter without escaping double quotes, so a quote terminates the intended value and injects a different name or parameter. Exposure requires an application to supply an attacker-controlled filename and a user to download the response; the demonstrated consequence is file-name or extension spoofing, not server-side file access.
The record
- CVE
- CVE-2023-29401
- Published
- Jun 8, 2023
- Updated
- Jan 6, 2025
- Vendor
- Gin-Gonic
- Product
- Gin
- Classifications
- CWE-494, CWE-20, T1036
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jun 8, 2023CVE publishedPublication date reported by the CVE source.
- Jan 6, 2025Record 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=1.3.1-0.20190301021747-ccb9e902956d <1.9.1
What conditions does exploitation require?
What is affected?
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
- Gin FileAttachment reflected file download 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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