Double Free in libwebm - CVE-2019-2126

Vulnerability identifier: #VU24676

CSH Severity: High

CVSS v4: 8.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2019-2126

CWE-ID: CWE-415

Exploitation vector: Remote access

Exploit availability: No public exploit available

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

The vulnerability exists due to a boundary error when processing user-supplied data within the ParseContentEncodingEntry() function of mkvparser.cpp. A remote attacker can pass specially crafted data to the application, trigger a double free error and execute arbitrary code on the target system.

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

libwebm
libvpx
Red Hat Enterprise Linux for ARM 64
Red Hat CodeReady Linux Builder for ARM 64
Red Hat CodeReady Linux Builder for Power, little endian
Red Hat CodeReady Linux Builder for x86_64
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for x86_64
Opensuse
Ubuntu
Fedora
libvpx (Red Hat package)
libvpx
godot (Ubuntu package)

Install update from vendor's website.

libwebm - update to 1.0.0.28
libvpx - update to 1.8.2
libvpx (Red Hat package) - update to 1.7.0-8.el8
libvpx - addressed in versions 1.8.2-1.fc30, 1.8.2-1.fc31
godot (Ubuntu package) - addressed in versions 3.2-stable-2ubuntu0.1~esm1, 3.2.3-stable-1ubuntu0.1~esm1, 3.5.2-stable-2ubuntu0.24.04.1~esm1, 3.5.2-stable-2ubuntu0.24.10.1, 3.6+ds-2ubuntu0.1

• https://github.com/webmproject/libvpx/commit/6a7c84a2449dcc70de2525df209afea908622399#diff-6bf546b8d7f5cc4db353cdd906a8f5e7

• Remote code execution in libwebm
• Multiple vulnerabilities in libvpx
• OpenSUSE Linux update for libvpx
• Red Hat Enterprise Linux 8 update for libvpx
• Fedora 31 update for libvpx
• Fedora 30 update for libvpx
• Ubuntu update for godot