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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.

 - mstolfp in libntp/mstolfp.c in NTP 4.2.8p15 has an out-of-bounds write in the cp<cpdec while loop. An adversary may be able to attack a client ntpq process, but cannot attack ntpd. (CVE-2023-26551)

 - mstolfp in libntp/mstolfp.c in NTP 4.2.8p15 has an out-of-bounds write when adding a decimal point. An adversary may be able to attack a client ntpq process, but cannot attack ntpd. (CVE-2023-26552)

 - mstolfp in libntp/mstolfp.c in NTP 4.2.8p15 has an out-of-bounds write when copying the trailing number.
 An adversary may be able to attack a client ntpq process, but cannot attack ntpd. (CVE-2023-26553)

 - mstolfp in libntp/mstolfp.c in NTP 4.2.8p15 has an out-of-bounds write when adding a '\0' character. An adversary may be able to attack a client ntpq process, but cannot attack ntpd. (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)

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: 1.1

Type: local

Agent: unix

Published: 1/9/2024

Updated: 2/19/2024

Supported Sensors: Frictionless Assessment AWS, Nessus Agent, Agentless Assessment, Frictionless Assessment 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:ntp, p-cpe:/a:amazon:linux:ntp-debuginfo, p-cpe:/a:amazon:linux:ntp-doc, p-cpe:/a:amazon:linux:ntp-perl, p-cpe:/a:amazon:linux:ntpdate, p-cpe:/a:amazon:linux:sntp, cpe:/o:amazon:linux:2

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