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GHSA-fgmr-vx7c-5wj6

Timing attack on HMAC signature comparison in Apache Tapestry

Source: GitHub Advisory Database (reviewed) Critical CVE-2019-10071

Packages

EcosystemPackageAffectedFixed in
Maven org.apache.tapestry:tapestry-core >= 5.4, < 5.4.5 5.4.5

Details

As written in the advisory (Markdown source, shown as plain text).

The code which checks HMAC in form submissions used String.equals() for comparisons, which results in a timing side channel for the comparison of the HMAC signatures. This could lead to remote code execution if an attacker is able to determine the correct signature for their payload. The comparison should be done with a constant time algorithm instead.

References

External links from the advisory. They lead to third-party sites.