Vulnerability identifier: #VU19145

Vulnerability risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-0049

CWE-ID: CWE-399

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Juniper Junos OS
Operating systems & Components / Operating system

Vendor: Juniper Networks, Inc.

Description

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

The vulnerability exists due to a certain sequence of BGP session restart on a remote peer may cause the local routing protocol daemon (RPD) process to crash and restart. A remote attacker can repeatedly crash the RPD process and cause prolonged denial of service attack.

This vulnerability affects only devices with enabled the BGP graceful restart helper mode or the BGP graceful restart mechanism.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Juniper Junos OS: 16.1 - 16.1R7-S1, 16.2 - 16.2R2-S8, 17.1 - 17.1R2-S10, 17.2 - 17.2X75-D110, 17.3 - 17.3R3-S1, 17.4 - 17.4R1-S6, 18.1 - 18.1R3-S1, 18.2 - 18.2R1-S5, 18.2X75-D5 - 18.2X75-D10, 18.3 - 18.3R1-S3

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External links
http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10943&cat=SIRT_1&actp=LIST

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.