The Vigil@nce team watches public vulnerabilities impacting your computers, and then offers security solutions, a vigilance database and tools to fix them.

Vulnerability of libEBML: use after free via EbmlMaster-Read

Synthesis of the vulnerability 

An attacker can force the usage of a freed memory area via EbmlMaster::Read() of libEBML, in order to trigger a denial of service, and possibly to run code.
Impacted software: Fedora.
Severity of this computer vulnerability: 2/4.
Creation date: 01/02/2021.
Références of this announce: FEDORA-2021-6c4215787a, FEDORA-2021-e84e1aaa2c, VIGILANCE-VUL-34444.

Description of the vulnerability 

An attacker can force the usage of a freed memory area via EbmlMaster::Read() of libEBML, in order to trigger a denial of service, and possibly to run code.
Full bulletin, software filtering, emails, fixes, ... (Request your free trial)

This security bulletin impacts software or systems such as Fedora.

Our Vigil@nce team determined that the severity of this cybersecurity announce is medium.

The trust level is of type confirmed by the editor, with an origin of document.

An attacker with a expert ability can exploit this vulnerability alert.

Solutions for this threat 

Fedora 32: new libebml packages.
New packages are available:
  Fedora 32: libebml 1.4.1-1.fc32

Fedora 33: new libebml packages.
New packages are available:
  Fedora 33: libebml 1.4.1-1.fc33
Full bulletin, software filtering, emails, fixes, ... (Request your free trial)

Computer vulnerabilities tracking service 

Vigil@nce provides an applications vulnerabilities patch. The Vigil@nce team tracks computer vulnerabilities impacting systems and applications.