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  5. CVE-2017-2646

CVE-2017-2646: Loop with Unreachable Exit Condition ('Infinite Loop')

October 18, 2018 (updated September 14, 2021)

It was found that when Keycloak before 2.5.5 receives a Logout request with a Extensions in the middle of the request, the SAMLSloRequestParser.parse() method ends in a infinite loop. An attacker could use this flaw to conduct denial of service attacks.

References

  • github.com/advisories/GHSA-jc6q-27mw-p55w
  • nvd.nist.gov/vuln/detail/CVE-2017-2646

Code Behaviors & Features

Detect and mitigate CVE-2017-2646 with GitLab Dependency Scanning

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Affected versions

All versions before 2.5.5

Fixed versions

  • 2.5.5

Solution

Upgrade to version 2.5.5 or above.

Impact 7.5 HIGH

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Learn more about CVSS

Weakness

  • CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop')

Source file

maven/org.keycloak/keycloak-core/CVE-2017-2646.yml

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