CVE-2018-19789

NameCVE-2018-19789
DescriptionAn issue was discovered in Symfony 2.7.x before 2.7.50, 2.8.x before 2.8.49, 3.x before 3.4.20, 4.0.x before 4.0.15, 4.1.x before 4.1.9, and 4.2.x before 4.2.1. When using the scalar type hint `string` in a setter method (e.g. `setName(string $name)`) of a class that's the `data_class` of a form, and when a file upload is submitted to the corresponding field instead of a normal text input, then `UploadedFile::__toString()` is called which will then return and disclose the path of the uploaded file. If combined with a local file inclusion issue in certain circumstances this could escalate it to a Remote Code Execution.
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)
ReferencesDLA-1707-1, DSA-4441-1
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+deb8u6fixed
stretch2.8.7+dfsg-1.3+deb9u2fixed
stretch (security)2.8.7+dfsg-1.3+deb9u3fixed
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)3.4.20+dfsg-1
symfonysourcejessie2.3.21+dfsg-4+deb8u4DLA-1707-1
symfonysourcestretch2.8.7+dfsg-1.3+deb9u2DSA-4441-1

Notes

https://symfony.com/blog/cve-2018-19789-disclosure-of-uploaded-files-full-path

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