Denial of service in Juniper Junos platforms

1) Resource exhaustion

EUVDB-ID: #VU14200

Risk: Medium

CVSSv3.1: 7.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C]

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

External links

http://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.