CVE-2019-18887: Symfony Http-Kernel has non-constant time comparison in UriSigner

CVE-2019-18887 · Severity: low · CVSS 3.1 · Published 2022-03-26

Symfony Http-Kernel has non-constant time comparison in UriSigner

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

Quick answers

Is CVE-2019-18887 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2019-18887 being exploited in the wild.
How severe is CVE-2019-18887?
Low severity, with a CVSS score of 3.1, published 26 March 2022.
Which products and versions are affected?
symfony/http-kernel (Packagist) ECOSYSTEM:introduced=2.2.0,fixed=2.8.52; symfony/symfony (Packagist) ECOSYSTEM:introduced=2.2.0,fixed=2.8.52.
Is there a fix for CVE-2019-18887?
Yes. symfony/http-kernel (Packagist): upgrade to 2.8.52 or later; symfony/symfony (Packagist): upgrade to 2.8.52 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
Am I affected by CVE-2019-18887?
Check whether you run symfony/http-kernel (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/http-kernel (Packagist): upgrade to 2.8.52 or later
    composer require symfony/http-kernel:^2.8.52
  • symfony/symfony (Packagist): upgrade to 2.8.52 or later
    composer require symfony/symfony:^2.8.52

Affected products

  • symfony/http-kernel (Packagist) ECOSYSTEM:introduced=2.2.0,fixed=2.8.52
  • symfony/symfony (Packagist) ECOSYSTEM:introduced=2.2.0,fixed=2.8.52

Identifiers

  • CVE-2019-18887
  • GHSA-q8hg-pf8v-cxrv

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