Amazon Linux AMI : c-ares (ALAS-2021-1545)
medium Nessus Plugin ID 154901
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Synopsis
The remote Amazon Linux AMI host is missing a security update.Description
The version of c-ares installed on the remote host is prior to 1.17.2-1.8. It is, therefore, affected by a vulnerability as referenced in the ALAS-2021-1545 advisory.- A flaw was found in c-ares library, where a missing input validation check of host names returned by DNS (Domain Name Servers) can lead to output of wrong hostnames which might potentially lead to Domain Hijacking. The highest threat from this vulnerability is to confidentiality and integrity as well as system availability. (CVE-2021-3672)
Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.
Solution
Run 'yum update c-ares' to update your system.See Also
Plugin Details
Severity: Medium
ID: 154901
File Name: ala_ALAS-2021-1545.nasl
Version: 1.5
Type: local
Agent: unix
Published: 11/5/2021
Updated: 12/15/2021
Supported Sensors: Frictionless Assessment Agent, Frictionless Assessment AWS, Nessus Agent
Risk Information
CVSS Score Source: CVE-2021-3672
VPR
Risk Factor: Medium
Score: 4.2
CVSS v2
Risk Factor: Medium
Base Score: 6.8
Temporal Score: 5
Vector: AV:N/AC:M/Au:N/C:P/I:P/A:P
Temporal Vector: E:U/RL:OF/RC:C
CVSS v3
Risk Factor: Medium
Base Score: 5.6
Temporal Score: 4.9
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
Temporal Vector: E:U/RL:O/RC:C
Vulnerability Information
CPE: p-cpe:/a:amazon:linux:c-ares, p-cpe:/a:amazon:linux:c-ares-debuginfo, p-cpe:/a:amazon:linux:c-ares-devel, cpe:/o:amazon:linux
Required KB Items: Host/local_checks_enabled, Host/AmazonLinux/release, Host/AmazonLinux/rpm-list
Exploit Ease: No known exploits are available
Patch Publication Date: 10/29/2021
Vulnerability Publication Date: 8/13/2021
Reference Information
CVE: CVE-2021-3672
ALAS: 2021-1545