#VU7535 Denial of service in Juniper Junos OS - CVE-2017-2346

Vulnerability identifier: #VU7535

Vulnerability risk: Low

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2017-2346

CWE-ID: CWE-20

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 cause DoS condition on the target system.

The weakness exists due to improper input validation. A remote attacker can send specially crafted large fragmented packets through an Application Layer Gateway (ALG) to cause the target MS-MPC or MS-MIC Service PIC to crash.

Successful exploitation of the vulnerability results in denial of service.

Mitigation
The vulnerability is addressed in the following versions:
14.1X55-D35, 14.2R7-S4, 14.2R8, 15.1R5-S2, 15.1R6, 16.1R3-S2, 16.1R4.

Vulnerable software versions

Juniper Junos OS: 14.1x55, 14.2R, 15.1R, 16.1R

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External links
https://kb.juniper.net/InfoCenter/index?page=content&id=JSA10794

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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.