CVE-2017-18343

NameCVE-2017-18343
Description** DISPUTED ** 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.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
NVD severitymedium

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
symfony (PTS)jessie2.3.21+dfsg-4+deb8u3vulnerable
jessie (security)2.3.21+dfsg-4+deb8u6vulnerable
stretch2.8.7+dfsg-1.3+deb9u2vulnerable
stretch (security)2.8.7+dfsg-1.3+deb9u3vulnerable
buster3.4.22+dfsg-2fixed
buster (security)3.4.22+dfsg-2+deb10u1fixed
bullseye, sid4.3.8+dfsg-1fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
symfonysource(unstable)3.4.0+dfsg-1unimportant

Notes

https://github.com/symfony/debug/pull/7/commits/e48bda29143bd1a83001780b4a78e483822d985c
https://github.com/symfony/symfony/issues/27987
https://github.com/symfony/symfony/pull/23684

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