Vulnerability identifier: #VU17699

Vulnerability risk: High

CVSSv3.1: 8.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2018-20760

CWE-ID: CWE-787

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
GPAC
Client/Desktop applications / Multimedia software

Vendor: GPAC

Description
The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to due to improper handling of a certain -1 return value. A remote attacker can trick the victim into executing the MP4Box command on a SubRip Subtitle (SRT) file that submits malicious input, trigger an out-of-bounds write condition in the gf_text_get_utf8_line function and execute arbitrary code with elevated privileges.

Successful exploitation of the vulnerability may result in system compromise.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

GPAC: 0.5.0 - 0.7.2

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External links
http://github.com/gpac/gpac/issues/1177

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.