#VU19985 Double Free in VLC Media Player - CVE-2019-12874

Vulnerability identifier: #VU19985

Vulnerability risk: High

CVSSv4.0: 5.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2019-12874

CWE-ID: CWE-415

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
VLC Media Player
Client/Desktop applications / Multimedia software

Vendor: VideoLAN

Description

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

The vulnerability exists due to a boundary error when processing MKV files in zlib_decompress_extra() function in modules/demux/mkv/util.cpp. A remote attacker can create a specially crafted MKV file, trick the victim into opening it, trigger double free error and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

VLC Media Player: 3.0.0 - 3.0.6

---

External links
https://git.videolan.org/?p=vlc.git;a=commit;h=81023659c7de5ac2637b4a879195efef50846102

---

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.