CVE-2019-18886: User enumeration leak using switch user functionality in Symfony

CVE-2019-18886 · Severity: low · CVSS 3.1 · Published 2019-12-02

User enumeration leak using switch user functionality in Symfony

Technologies: symfony/security-http (Packagist), symfony/symfony (Packagist). Vendors: Packagist.

Quick answers

Is CVE-2019-18886 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2019-18886 being exploited in the wild.
How severe is CVE-2019-18886?
Low severity, with a CVSS score of 3.1, published 2 December 2019.
Which products and versions are affected?
symfony/security-http (Packagist) ECOSYSTEM:introduced=4.1.0,fixed=4.2.12; symfony/symfony (Packagist) ECOSYSTEM:introduced=4.1.0,fixed=4.2.12.
Is there a fix for CVE-2019-18886?
Yes. symfony/security-http (Packagist): upgrade to 4.2.12 or later; symfony/symfony (Packagist): upgrade to 4.2.12 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
Am I affected by CVE-2019-18886?
Check whether you run symfony/security-http (Packagist) or symfony/symfony (Packagist) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • symfony/security-http (Packagist): upgrade to 4.2.12 or later
    composer require symfony/security-http:^4.2.12
  • symfony/symfony (Packagist): upgrade to 4.2.12 or later
    composer require symfony/symfony:^4.2.12

Affected products

  • symfony/security-http (Packagist) ECOSYSTEM:introduced=4.1.0,fixed=4.2.12
  • symfony/symfony (Packagist) ECOSYSTEM:introduced=4.1.0,fixed=4.2.12

Identifiers

  • CVE-2019-18886
  • GHSA-4vpc-5jx4-cfqg

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