Detections
Analytics
Amazon Linux 2 : c-ares (ALAS-2024-2399)
high Nessus Plugin ID 187841
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Synopsis
The remote Amazon Linux 2 host is missing a security update.Description
The version of c-ares installed on the remote host is prior to 1.10.0-3. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2-2024-2399 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)
- A flaw was found in the c-ares package. The ares_set_sortlist is missing checks about the validity of the input string, which allows a possible arbitrary length stack overflow. This issue may cause a denial of service or a limited impact on confidentiality and integrity. (CVE-2022-4904)
- c-ares is an asynchronous resolver library. ares_inet_net_pton() is vulnerable to a buffer underflow for certain ipv6 addresses, in particular 0::00:00:00/2 was found to cause an issue. C-ares only uses this function internally for configuration purposes which would require an administrator to configure such an address via ares_set_sortlist(). However, users may externally use ares_inet_net_pton() for other purposes and thus be vulnerable to more severe issues. This issue has been fixed in 1.19.1. (CVE-2023-31130)
Note that Nessus has not tested for these issues 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
https://alas.aws.amazon.com/AL2/ALAS-2024-2399.html
https://alas.aws.amazon.com/cve/html/CVE-2021-3672.html
https://alas.aws.amazon.com/cve/html/CVE-2022-4904.html
Plugin Details
Severity: High
ID: 187841
File Name: al2_ALAS-2024-2399.nasl
Version: 1.1
Type: local
Agent: unix
Published: 1/9/2024
Updated: 1/10/2024
Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Continuous Assessment, Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 6.7
CVSS v2
Risk Factor: Medium
Base Score: 6.8
Temporal Score: 5.3
Vector: CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P
CVSS Score Source: CVE-2021-3672
CVSS v3
Risk Factor: High
Base Score: 8.6
Temporal Score: 7.7
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C
CVSS Score Source: CVE-2022-4904
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:2
Required KB Items: Host/local_checks_enabled, Host/AmazonLinux/release, Host/AmazonLinux/rpm-list
Exploit Available: true
Exploit Ease: Exploits are available
Patch Publication Date: 1/3/2024
Vulnerability Publication Date: 8/13/2021