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Related Vulnerabilities: CVE-2014-0021

It was reported that the cmdmon protocol implemented in chrony was found to be vulnerable to DDoS attacks using traffic amplification. By default, commands are allowed only from localhost, but it's possible to configure chronyd to allow commands from any address. This could allow a remote attacker to cause a DoS, which could cause excessive resource usage.

Source

ALAS-2014-366

Amazon Linux AMI Security Advisory: ALAS-2014-366
Advisory Release Date: 2014-07-09 16:20 Pacific
Advisory Updated Date: 2014-09-19 10:27 Pacific

Severity: Low

References: CVE-2014-0021

Issue Overview:

It was reported that the cmdmon protocol implemented in chrony was found to be vulnerable to DDoS attacks using traffic amplification. By default, commands are allowed only from localhost, but it's possible to configure chronyd to allow commands from any address. This could allow a remote attacker to cause a DoS, which could cause excessive resource usage.

Affected Packages:

chrony

Issue Correction:
Run yum update chrony to update your system.

New Packages:

i686:
    chrony-1.29.1-1.8.amzn1.i686
    chrony-debuginfo-1.29.1-1.8.amzn1.i686

src:
    chrony-1.29.1-1.8.amzn1.src

x86_64:
    chrony-debuginfo-1.29.1-1.8.amzn1.x86_64
    chrony-1.29.1-1.8.amzn1.x86_64

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ALAS-2014-366

ALAS-2014-366

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