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Amazon Linux 2 : ntp (ALAS-2024-2396)

medium Nessus Plugin ID 187833

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Synopsis

The remote Amazon Linux 2 host is missing a security update.

Description

The version of ntp installed on the remote host is prior to 4.2.8p15-3. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2-2024-2396 advisory.

 2024-02-15: CVE-2023-26555 was added to this advisory.

 mstolfp in libntp/mstolfp.c in NTP 4.2.8p15 has an out-of-bounds write in the cp<cpdec while loop.
 (CVE-2023-26551)

 mstolfp in libntp/mstolfp.c in NTP 4.2.8p15 has an out-of-bounds write when adding a decimal point.
 (CVE-2023-26552)

 mstolfp in libntp/mstolfp.c in NTP 4.2.8p15 has an out-of-bounds write when copying the trailing number.
 (CVE-2023-26553)

 mstolfp in libntp/mstolfp.c in NTP 4.2.8p15 has an out-of-bounds write when adding a '\0' character.
 (CVE-2023-26554)

 praecis_parse in ntpd/refclock_palisade.c in NTP 4.2.8p15 has an out-of-bounds write. Any attack method would be complex, e.g., with a manipulated GPS receiver. (CVE-2023-26555)

Tenable has extracted the preceding description block directly from the tested product security advisory.

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 ntp' to update your system.

See Also

https://alas.aws.amazon.com/AL2/ALAS-2024-2396.html

https://alas.aws.amazon.com/faqs.html

https://alas.aws.amazon.com/cve/html/CVE-2023-26551.html

https://alas.aws.amazon.com/cve/html/CVE-2023-26552.html

https://alas.aws.amazon.com/cve/html/CVE-2023-26553.html

https://alas.aws.amazon.com/cve/html/CVE-2023-26554.html

https://alas.aws.amazon.com/cve/html/CVE-2023-26555.html

Plugin Details

Severity: Medium

ID: 187833

File Name: al2_ALAS-2024-2396.nasl

Version: 1.2

Type: local

Agent: unix

Published: 1/9/2024

Updated: 12/11/2024

Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: Medium

Base Score: 6.2

Temporal Score: 4.6

Vector: CVSS2#AV:L/AC:H/Au:N/C:C/I:C/A:C

CVSS Score Source: CVE-2023-26555

CVSS v3

Risk Factor: Medium

Base Score: 6.4

Temporal Score: 5.6

Vector: CVSS:3.0/AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:amazon:linux:sntp, p-cpe:/a:amazon:linux:ntpdate, cpe:/o:amazon:linux:2, p-cpe:/a:amazon:linux:ntp, p-cpe:/a:amazon:linux:ntp-debuginfo, p-cpe:/a:amazon:linux:ntp-perl, p-cpe:/a:amazon:linux:ntp-doc

Required KB Items: Host/local_checks_enabled, Host/AmazonLinux/release, Host/AmazonLinux/rpm-list

Exploit Ease: No known exploits are available

Patch Publication Date: 1/3/2024

Vulnerability Publication Date: 4/11/2023

Reference Information

CVE: CVE-2023-26551, CVE-2023-26552, CVE-2023-26553, CVE-2023-26554, CVE-2023-26555