ECDSA Signature Malleability in Node.js Elliptic Package - CVE-2024-42461
Summary
DEBIAN-CVE-2024-42461: In the Elliptic package 6.5.6 for Node.js, ECDSA signature malleability occurs because BER-encoded signatures are allowed. Affects node-elliptic versions < 6.5.7+dfsg-1. Fixed in 6.5.7+dfsg-1. How to fix ↓
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Background
The Elliptic package is a widely used library in Node.js for elliptic curve cryptography, providing functionalities for secure communications and data integrity. It supports various elliptic curve algorithms, including ECDSA (Elliptic Curve Digital Signature Algorithm). The package is integral for developers implementing cryptographic features in their applications. However, a vulnerability has been identified in version 6.5.6, which can lead to ECDSA signature malleability, posing risks to the integrity of cryptographic operations.
Vulnerability Detail
In the Elliptic package version 6.5.6, a vulnerability allows for ECDSA signature malleability due to the acceptance of BER-encoded signatures. This means that an attacker could potentially alter the signature without invalidating it, leading to unauthorized actions or data manipulation. The issue arises from how the library encodes and decodes signatures, which can be exploited in scenarios where signature integrity is critical.
How To Fix
Minimum fixed version
6.5.7+dfsg-1
This is the first release that contains the fix.
sudo apt-get install --only-upgrade node-ellipticTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
As a temporary workaround, developers can implement additional validation checks on the signatures to ensure their integrity before processing them. However, this is not a substitute for updating the package.
Conclusion
The vulnerability identified as CVE-2024-42461 in the Elliptic package poses significant risks due to ECDSA signature malleability. It is crucial for developers to update to the patched version to maintain the integrity of their cryptographic operations. Utilizing tools like Vulert can help monitor and alert for such vulnerabilities in real-time.
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FAQ
CVE-2024-42461 is a vulnerability in the Elliptic package for Node.js that allows for ECDSA signature malleability, potentially compromising cryptographic operations.
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 risks include unauthorized actions or data manipulation due to the ability of an attacker to alter valid signatures.
Yes, a patch is available in version 6.5.7+dfsg-1 of the Elliptic package. Updating to this version will resolve the vulnerability.
If immediate updating is not possible, implement additional validation checks on signatures as a temporary workaround until you can apply the patch.
References
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