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e2openplugin OpenWebif 1.2.4 Code Execution

e2openplugin OpenWebif 1.2.4 Code Execution
Posted Oct 3, 2017
Authored by John Torakis

e2openplugin OpenWebif versions 0.2.9 through 1.2.4 suffer from a code execution vulnerability.

tags | exploit, code execution
advisories | CVE-2017-9807
MD5 | e3b736333b9d373249b51af3bd173ccf

e2openplugin OpenWebif 1.2.4 Code Execution

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Hello all,

e2openplugin-OpenWebif is an open source web interface plugin for IP TVs
and media centers. It is found in several IP TV software images and
hardware products including the commercial Dreambox devices.


A remote code injection vulnerability was found in the "key" HTTP GET
parameter of the "/api/saveconfig" API call.

Further analysis of the vulnerability can be found here:
https://census-labs.com/news/2017/10/02/e2openplugin-openwebif-saveconfig-remote-code-execution/

The vulnerability allows remote code execution on hosts running the
aforementioned plugin. Some devices affected also run the plugin under
root privileges (e.g: Dreambox DM800 HD se), allowing for complete
remote takeover of the host.

This defect has been patched by the vendor with the git commit:
09a050c8f04afd3bb4a14af98994be255aae10d9
(https://github.com/E2OpenPlugins/e2openplugin-OpenWebif/commit/09a050c8f04afd3bb4a14af98994be255aae10d9).

Administrators of affected devices are strongly advised to update their
running instance of e2openplugin-OpenWebif to the latest version of the
code. An official release containing the fix has not been released yet.


References:
https://github.com/E2OpenPlugins/e2openplugin-OpenWebif/issues/620
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-9807
https://census-labs.com/news/2017/10/02/e2openplugin-openwebif-saveconfig-remote-code-execution/

Disclosure Timeline:
Vendor Contact: June 21st, 2017
CVE assignment: June 22nd, 2017
Vendor Patch: September 15th, 2017
Public Advisory: October 2nd, 2017


Regards,
--
John Torakis

Security Researcher
CENSUS S.A.



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