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Juniper Junos OS Multiple Vulnerabilities (JSA73177)

medium Nessus Plugin ID 310772

Synopsis

The remote device is missing a vendor-supplied security patch.

Description

The version of Junos OS installed on the remote host is affected by multiple vulnerabilities as referenced in the JSA73177 advisory.

 - 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)

 - 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)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Apply the relevant Junos software release referenced in Juniper advisory JSA73177

See Also

https://kb.juniper.net/JSA73177

http://www.bcp38.info/index.php/Main_Page

https://doc.ntp.org/support/securitynotice/ntpbug1532/

https://www.nwtime.org/news/ntp-winter-2013-network-drdos-attacks/

http://www.nessus.org/u?c8e138af

Plugin Details

Severity: Medium

ID: 310772

File Name: juniper_jsa73177.nasl

Version: 1.1

Type: Combined

Published: 4/29/2026

Updated: 4/29/2026

Supported Sensors: 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: cpe:/o:juniper:junos

Required KB Items: Host/Juniper/JUNOS/Version

Exploit Ease: No known exploits are available

Patch Publication Date: 10/11/2023

Vulnerability Publication Date: 4/11/2023

Reference Information

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

JSA: JSA73177