Cross-site Scripting (XSS) Affecting symfony package, versions <3.4.0+dfsg-1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Start learning- Snyk IDSNYK-DEBIAN12-SYMFONY-1560179
- published20 Jul 2018
- disclosed20 Jul 2018
Introduced: 20 Jul 2018
CVE-2017-18343 (opens in a new tab)How to fix?
Upgrade Debian:12 symfony to version 3.4.0+dfsg-1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream symfony package and not the symfony package as distributed by Debian.
See How to fix? for Debian:12 relevant fixed versions and status.
The debug handler in Symfony before v2.7.33, 2.8.x before v2.8.26, 3.x before v3.2.13, and 3.3.x before v3.3.6 has XSS via an array key during exception pretty printing in ExceptionHandler.php, as demonstrated by a /_debugbar/open?op=get URI. NOTE: the vendor's position is that this is not a vulnerability because the debug tools are not intended for production use. NOTE: the Symfony Debug component is used by Laravel Debugbar
References
- https://security-tracker.debian.org/tracker/CVE-2017-18343
- https://github.com/symfony/debug/pull/7/commits/e48bda29143bd1a83001780b4a78e483822d985c
- https://github.com/barryvdh/laravel-debugbar/issues/850
- https://github.com/symfony/symfony/issues/27987
- https://github.com/symfony/symfony/pull/23684
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2017-18343