Description

Applications using Spring Cloud Gateway are vulnerable to specifically crafted requests that could make an extra request on downstream services.

Affected Spring Products and Versions

• Spring Cloud Gateway
  • 3.0.0 to 3.0.4
  • 2.2.0.RELEASE to 2.2.9.RELEASE
  • Older, unsupported versions are also affected

Mitigation

Users of affected versions should apply the following mitigation: 3.0.x users should upgrade to 3.0.5+, 2.2.x users should upgrade to 2.2.10.RELEASE+. No other steps are necessary. Releases that have fixed this issue include:

• Spring Cloud Gateway
  • 3.0.5+
  • 2.2.10.RELEASE+

Credit

This vulnerability was discovered and responsibly reported by Frederico Biehl and Maxim Tyukov from the Backbase security team.

References

• https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L/E:F/RL:O/RC:C

History

• 2021-11-04: Initial vulnerability report published.