International Domain Name Handling Vulnerability in curl Package
Summary
ALPINE-CVE-2016-8625: curl before version 7.51.0 uses outdated IDNA 2003 standard to handle International Domain Names and this may lead users to potentially and unknowingly issue network transfer requests to the wrong host. Affects curl versions < 7.51.0-r0. Fixed in 7.51.0-r0. How to fix ↓
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Background
The curl package is a widely used command-line tool and library for transferring data with URLs. It supports various protocols including HTTP, HTTPS, FTP, and more. curl is essential for developers and system administrators for tasks such as downloading files, interacting with APIs, and automating web requests. However, prior to version 7.51.0, curl utilized the outdated IDNA 2003 standard for handling International Domain Names (IDNs), which could lead to security risks.
Vulnerability Detail
The vulnerability, identified as CVE-2016-8625, arises from curl's reliance on the outdated IDNA 2003 standard for processing International Domain Names. This flaw can potentially mislead users into issuing network transfer requests to incorrect hosts, exposing them to man-in-the-middle attacks or data breaches. The severity of this vulnerability is rated at CVSS 3.0 score of 7.5, indicating a high risk to users who may unknowingly interact with malicious entities.
How To Fix
Minimum fixed version
7.51.0-r0
This is the first release that contains the fix.
sudo apk add --upgrade curlTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
As a temporary workaround, users can avoid using International Domain Names until the curl package is updated to a secure version. Additionally, consider using IP addresses directly for network requests to mitigate the risk of misdirected traffic.
Conclusion
The vulnerability in the curl package, CVE-2016-8625, poses significant risks due to its outdated handling of International Domain Names. Users are strongly advised to update to the latest version to mitigate these risks. Utilizing tools like Vulert can help monitor and alert for such vulnerabilities in real-time.
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FAQ
CVE-2016-8625 is a vulnerability in the curl package that affects its handling of International Domain Names, potentially leading to incorrect network requests.
You can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability without needing to sign up.
The CVSS score for this vulnerability is 7.5, indicating a high severity level.
If an immediate update is not possible, avoid using International Domain Names and consider using direct IP addresses for your requests.
More information about curl can be found on its official website or its GitHub repository, where you can also track updates and security advisories.
References
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