CVE-2020-10714

Description

A flaw was found in WildFly Elytron version 1.11.3.Final and before. When using WildFly Elytron FORM authentication with a session ID in the URL, an attacker could perform a session fixation attack. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

Mitigation

This attack is dependent on the attacker being able to create a session and the victim accessing the session before the session expires, we do have a 15 minute session timeout by default but the attacker could also keep this alive by say sending in a request every five minutes.

The server by default supports session tracking by URL and Cookie, if the web.xml is updated to support COOKIE only the exploit is not possible by sharing the link.

  <session-config>
    <tracking-mode>URL</tracking-mode>
  </session-config>
TO
  <session-config>
    <tracking-mode>COOKIE</tracking-mode>
  </session-config>

Common Vulnerability Scoring System (CVSS) Score Details

Info alert:Important note

CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).

CVSS v3 Score Breakdown

Red HatNVDcve.org
Base Score7.57.5N/A
Attack VectorNetworkNetworkN/A
Attack ComplexityHighHighN/A
Privileges RequiredNoneNoneN/A
User InteractionRequiredRequiredN/A
ScopeUnchangedUnchangedN/A
ConfidentialityHighHighN/A
Integrity ImpactHighHighN/A
Availability ImpactHighHighN/A

Vector

Red Hat: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

NVD: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

Understanding the Weakness (CWE)

CWE-384

Access Control

Technical Impact: Gain Privileges or Assume Identity

Acknowledgements

Red Hat would like to thank Mark Banierink (Nedap) for reporting this issue.

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