Timing Attack Affecting github.com/robbert229/jwt Open this link in a new tab package, versions <1.0.0
Attack Complexity
High
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snyk-id
SNYK-GOLANG-GITHUBCOMROBBERT229JWT-50051
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published
1 Oct 2017
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disclosed
31 Mar 2015
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credit
Vetcher
Introduced: 31 Mar 2015
CWE-208 Open this link in a new tabHow to fix?
Upgrade github.com/robbert229/jwt
to version 1.0.0 or higher.
Overview
Affected versions of this package are vulnerable to Timing Attack. The library uses the insecure, non-constant string comparison function strings.Compare()
, instead of the time constant string comparison. As a result, the comparison will fail faster when the first characters in the HMAC are incorrect. An attacker can use this difference to perform a timing attack, essentially allowing them to guess the HMAC one character at a time.
Similar vulnerability was previously found in Google's Keyczar crytographic library.