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AUSCERT External Security Bulletin Redistribution
ESB-2022.6096
USN-5733-1: FLAC vulnerabilities
22 November 2022
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AusCERT Security Bulletin Summary
---------------------------------
Product: FLAC
Publisher: Ubuntu
Operating System: Ubuntu
Resolution: Patch/Upgrade
CVE Names: CVE-2021-0561 CVE-2020-0499 CVE-2017-6888
Original Bulletin:
https://ubuntu.com/security/notices/USN-5733-1
Comment: CVSS (Max): 5.5 CVE-2021-0561 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N)
CVSS Source: NVD
Calculator: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
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USN-5733-1: FLAC vulnerabilities
21 November 2022
Several security issues were fixed in FLAC.
Releases
o Ubuntu 22.04 LTS
o Ubuntu 20.04 LTS
o Ubuntu 18.04 LTS
o Ubuntu 16.04 ESM
o Ubuntu 14.04 ESM
Packages
o flac - Free Lossless Audio Codec
Details
It was discovered that FLAC was not properly performing memory management
operations, which could result in a memory leak. An attacker could possibly
use this issue to cause FLAC to consume resources, leading to a denial of
service. This issue only affected Ubuntu 14.04 ESM, Ubuntu 16.04 ESM and
Ubuntu 18.04 LTS. ( CVE-2017-6888 )
It was discovered that FLAC was not properly performing bounds checking
operations when decoding data. If a user or automated system were tricked
into processing a specially crafted file, an attacker could possibly use
this issue to expose sensitive information or to cause FLAC to crash,
leading to a denial of service. This issue only affected Ubuntu 14.04 ESM,
Ubuntu 16.04 ESM, Ubuntu 18.04 LTS and Ubuntu 20.04 LTS. ( CVE-2020-0499 )
It was discovered that FLAC was not properly performing bounds checking
operations when encoding data. If a user or automated system were tricked
into processing a specially crafted file, an attacker could possibly use
this issue to expose sensitive information or to cause FLAC to crash,
leading to a denial of service. ( CVE-2021-0561 )
Update instructions
The problem can be corrected by updating your system to the following package
versions:
Ubuntu 22.04
o flac - 1.3.3-2ubuntu0.1
o libflac++6v5 - 1.3.3-2ubuntu0.1
o libflac8 - 1.3.3-2ubuntu0.1
Ubuntu 20.04
o flac - 1.3.3-1ubuntu0.1
o libflac++6v5 - 1.3.3-1ubuntu0.1
o libflac8 - 1.3.3-1ubuntu0.1
Ubuntu 18.04
o flac - 1.3.2-1ubuntu0.1
o libflac++6v5 - 1.3.2-1ubuntu0.1
o libflac8 - 1.3.2-1ubuntu0.1
Ubuntu 16.04
o flac - 1.3.1-4ubuntu0.1~esm1
Available with Ubuntu Pro (Infra-only)
o libflac++6v5 - 1.3.1-4ubuntu0.1~esm1
Available with Ubuntu Pro (Infra-only)
o libflac8 - 1.3.1-4ubuntu0.1~esm1
Available with Ubuntu Pro (Infra-only)
Ubuntu 14.04
o flac - 1.3.0-2ubuntu0.14.04.1+esm1
Available with Ubuntu Pro (Infra-only)
o libflac++6 - 1.3.0-2ubuntu0.14.04.1+esm1
Available with Ubuntu Pro (Infra-only)
o libflac8 - 1.3.0-2ubuntu0.14.04.1+esm1
Available with Ubuntu Pro (Infra-only)
In general, a standard system update will make all the necessary changes.
References
o CVE-2017-6888
o CVE-2020-0499
o CVE-2021-0561
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