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Vulnerability of libsndfile: buffer overflow via i2alaw/i2ulaw_array

Synthesis of the vulnerability 

An attacker can generate a buffer overflow via i2alaw/i2ulaw_array() of libsndfile, in order to trigger a denial of service, and possibly to run code.
Vulnerable systems: Debian, RHEL, Ubuntu.
Severity of this threat: 3/4.
Number of vulnerabilities in this bulletin: 2.
Creation date: 30/11/2018.
Références of this weakness: 429, CVE-2018-19661, CVE-2018-19662, DLA-1618-1, RHSA-2020:1636-01, RHSA-2020:3922-01, USN-4013-1, VIGILANCE-VUL-27926.

Description of the vulnerability 

An attacker can generate a buffer overflow via i2alaw/i2ulaw_array() of libsndfile, in order to trigger a denial of service, and possibly to run code.
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This security threat impacts software or systems such as Debian, RHEL, Ubuntu.

Our Vigil@nce team determined that the severity of this computer weakness note is important.

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

This bulletin is about 2 vulnerabilities.

An attacker with a expert ability can exploit this computer threat alert.

Solutions for this threat 

libsndfile: patch for i2alaw/i2ulaw_array.
A patch is indicated in information sources.

Debian 8: new libsndfile packages.
New packages are available:
  Debian 8: libsndfile 1.0.25-9.1+deb8u2

RHEL 7.8: new libsndfile packages.
New packages are available:
  RHEL 7.0-7.8: libsndfile 1.0.25-12.el7

RHEL 8: new libsndfile packages.
New packages are available:
  RHEL 8.0-8.1: libsndfile 1.0.28-10.el8

Ubuntu: new libsndfile1 packages.
New packages are available:
  Ubuntu 18.10: libsndfile1 1.0.28-4ubuntu0.18.10.1
  Ubuntu 18.04 LTS: libsndfile1 1.0.28-4ubuntu0.18.04.1
  Ubuntu 16.04 LTS: libsndfile1 1.0.25-10ubuntu0.16.04.2
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