CVE-2016-4423: Symphony Denial of Service Via Overlong Usernames

CVE-2016-4423 · Severity: low · CVSS 3 · Published 2022-05-17

Symphony Denial of Service Via Overlong Usernames

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

Quick answers

Is CVE-2016-4423 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2016-4423 being exploited in the wild.
How severe is CVE-2016-4423?
Low severity, with a CVSS score of 3, published 17 May 2022.
Which products and versions are affected?
symfony/security (Packagist) ECOSYSTEM:introduced=2.3.0,fixed=2.3.41; symfony/security-http (Packagist) ECOSYSTEM:introduced=2.3.0,fixed=2.3.41; symfony/symfony (Packagist) ECOSYSTEM:introduced=2.3.0,fixed=2.3.41.
Is there a fix for CVE-2016-4423?
Yes. symfony/security (Packagist): upgrade to 2.3.41 or later; symfony/security-http (Packagist): upgrade to 2.3.41 or later; symfony/symfony (Packagist): upgrade to 2.3.41 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
Am I affected by CVE-2016-4423?
Check whether you run symfony/security (Packagist), 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 (Packagist): upgrade to 2.3.41 or later
    composer require symfony/security:^2.3.41
  • symfony/security-http (Packagist): upgrade to 2.3.41 or later
    composer require symfony/security-http:^2.3.41
  • symfony/symfony (Packagist): upgrade to 2.3.41 or later
    composer require symfony/symfony:^2.3.41

Affected products

  • symfony/security (Packagist) ECOSYSTEM:introduced=2.3.0,fixed=2.3.41
  • symfony/security-http (Packagist) ECOSYSTEM:introduced=2.3.0,fixed=2.3.41
  • symfony/symfony (Packagist) ECOSYSTEM:introduced=2.3.0,fixed=2.3.41

Identifiers

  • CVE-2016-4423
  • GHSA-whgv-8cg3-7hcm

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