Bug 1620252 (CVE-2017-16790) - CVE-2017-16790 php-symfony: Information Exposure due to an improper check of FileType on submitted data
Summary: CVE-2017-16790 php-symfony: Information Exposure due to an improper check of ...
Alias: CVE-2017-16790
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
Depends On: 1620253 1620254 1620255 1620256
TreeView+ depends on / blocked
Reported: 2018-08-22 20:21 UTC by Laura Pardo
Modified: 2019-09-29 14:56 UTC (History)
3 users (show)

Fixed In Version: symfony 2.7.38, symfony 2.8.31, symfony 3.2.14, symfony 3.3.13, symfony 3.4-BETA5, symfony 4.0-BETA5
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Last Closed: 2019-06-10 10:36:17 UTC

Attachments (Terms of Use)

Description Laura Pardo 2018-08-22 20:21:24 UTC
An issue was discovered in Symfony before 2.7.38, 2.8.31, 3.2.14, 3.3.13, 3.4-BETA5, and 4.0-BETA5. When a form is submitted by the user, the request handler classes of the Form component merge POST data and uploaded files data into one array. This big array forms the data that are then bound to the form. At this stage there is no difference anymore between submitted POST data and uploaded files. A user can send a crafted HTTP request where the value of a "FileType" is sent as normal POST data that could be interpreted as a local file path on the server-side (for example, "file:///etc/passwd"). If the application did not perform any additional checks about the value submitted to the "FileType", the contents of the given file on the server could have been exposed to the attacker. 


Comment 1 Laura Pardo 2018-08-22 20:22:08 UTC
Created php-symfony tracking bugs for this issue:

Affects: epel-7 [bug 1620254]
Affects: fedora-27 [bug 1620253]

Created php-symfony3 tracking bugs for this issue:

Affects: fedora-28 [bug 1620256]

Created php-symfony4 tracking bugs for this issue:

Affects: fedora-all [bug 1620255]

Comment 2 Product Security DevOps Team 2019-06-10 10:36:17 UTC
This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.

Note You need to log in before you can comment on or make changes to this bug.