Denial of service in Juniper Junos OS ntpd



Published: 2021-04-15
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2019-8936
CWE-ID CWE-476
Exploitation vector Network
Public exploit N/A
Vulnerable software
Subscribe 		Juniper Junos OS
Operating systems & Components / Operating system

Vendor Juniper Networks, Inc.

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) NULL pointer dereference

EUVDB-ID: #VU20339

Risk: Low

CVSSv3.1:

CVE-ID: CVE-2019-8936

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a NULL pointer dereference error when processing authenticated mode 6 packets. A remote attacker can send malicious authenticated mode 6 (ntpq) packet from a permitted network address, trigger a NULL pointer dereference error and crash ntpd.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Juniper Junos OS: before 19.4R1

CPE2.3 External links

http://kb.juniper.net/InfoCenter/index?page=content&id=JSA11115&cat=SIRT_1&actp=LIST


Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?



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