Denial of service in Juniper Junos platforms

1) Resource exhaustion

EUVDB-ID: #VU14200

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2018-5390

CWE-ID: CWE-400 - Resource exhaustion

Exploit availability: No

Description

The vulnerability allows a remote attacker to cause DoS condition on the target system.

The vulnerability exists due to the system uses an inefficient TCP reassembly algorithm. A remote attacker can send specially crafted packets within ongoing TCP sessions to consume excessive CPU resources and cause the service to crash.

Note: The issue has been called "SegmentSmack".

Mitigation

As software releases are updated to resolve this specific issue, this Juniper Security Advisory (JSA) will be updated.

Vulnerable software versions

vPTX: All versions

vQFX: All versions

vSRX: All versions

vMX: All versions

PTX10008​: All versions

QFX10008: All versions

QFX5200: All versions

NFX 150/250: All versions

QFX5100: All versions

MX480: All versions

MX80: All versions

CPE2.3

• cpe:2.3:h:juniper_networks:vptx:*:*:*:*:*:*:*:*
• cpe:2.3:h:juniper_networks:vqfx:*:*:*:*:*:*:*:*
• cpe:2.3:h:juniper_networks:vsrx:*:*:*:*:*:*:*:*
• cpe:2.3:h:juniper_networks:vmx:*:*:*:*:*:*:*:*
• cpe:2.3:h:juniper_networks:ptx10008​:*:*:*:*:*:*:*:*
• cpe:2.3:h:juniper_networks:qfx10008:*:*:*:*:*:*:*:*
• cpe:2.3:h:juniper_networks:qfx5200:*:*:*:*:*:*:*:*
• cpe:2.3:h:juniper_networks:nfx_150_250:*:*:*:*:*:*:*:*
• cpe:2.3:h:juniper_networks:qfx5100:*:*:*:*:*:*:*:*
• cpe:2.3:h:juniper_networks:mx480:*:*:*:*:*:*:*:*
• cpe:2.3:h:juniper_networks:mx80:*:*:*:*:*:*:*:*

External links

https://kb.juniper.net/InfoCenter/index?page=content&id=JSA10876&cat=SIRT_1&actp=LIST

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.