CVE-2015-10004: Timing side-channel vulnerability in github.com/robbert229/jwt
Summary
CVE-2015-10004: Timing side-channel in github.com/robbert229/jwt. Affects github.com/robbert229/jwt versions < 0.0.0-20170426191122-ca1404ee6e83. Fixed in 0.0.0-20170426191122-ca1404ee6e83. How to fix ↓
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Background
The package github.com/robbert229/jwt is a Go library that provides functionality for JSON Web Tokens (JWTs). JWTs are used for securely transmitting information between parties as a JSON object. The library includes token validation methods that are susceptible to a timing side-channel during HMAC comparison. This vulnerability allows an attacker, with a large number of requests over a low latency connection, to determine the expected HMAC.
Vulnerability Detail
The timing side-channel vulnerability in github.com/robbert229/jwt arises due to the implementation of token validation methods. During HMAC comparison, the code does not handle timing differences properly, allowing an attacker to exploit the timing side-channel. By sending a large number of requests and measuring the response times, an attacker can infer the expected HMAC and potentially bypass token validation. This can lead to unauthorized access and potential data breaches.
How To Fix
Latest published version: v2.0.0+incompatible as of 23 Oct 2026
go get github.com/robbert229/jwt@v2.0.0+incompatibleUpgrading to it may include breaking changes; the version below is the minimum fixed release for this vulnerability.
If you need the minimum change
0.0.0-20170426191122-ca1404ee6e83
This is the first release that contains the fix.
go get github.com/robbert229/jwt@v0.0.0-20170426191122-ca1404ee6e83Tip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
There is no known workaround for this vulnerability. It is essential to update the package to the fixed version to mitigate the risk.
Conclusion
The timing side-channel vulnerability in github.com/robbert229/jwt can lead to unauthorized access and potential data breaches. It is crucial to update the package to the fixed version and rebuild applications to mitigate the risk. For further support, contact DevNack.com.
See every vulnerability recorded for github.com/robbert229/jwt →
FAQ
This vulnerability allows an attacker to potentially bypass token validation and gain unauthorized access. It can lead to data breaches and compromise the security of the affected application.
You can use the Vulert Playground at Vulert Scanner to check if your application is affected by this vulnerability. Simply provide your Gopkg.lock file, and Vulert will analyze it for any open-source vulnerabilities, including this one.
While there are no known public exploits for this specific vulnerability, it is important to address it promptly to prevent potential attacks.
Manually validating tokens may not be sufficient to mitigate this vulnerability. It is recommended to update the github.com/robbert229/jwt package to the fixed version, as it includes the necessary changes to handle the timing side-channel properly.
For further support on vulnerability remediation, you can reach out to info@devnack.com. They can provide guidance and assistance in addressing this vulnerability.
