#VU21692 Buffer overflow in Juniper Junos OS - CVE-2019-0055

Vulnerability identifier: #VU21692

Vulnerability 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-2019-0055

CWE-ID: CWE-119

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 a denial of service (DoS) condition.

The vulnerability exists due to a boundary error in the SIP ALG packet processing service. A remote attacker can send a specific types of valid SIP traffic to the device, cause flowd process to crash, trigger memory corruption and cause a denial of service condition.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Juniper Junos OS: 12.3X48-D10 - 12.3x48, 15.1X49-D10 - 15.1X49, 17.3R1-S1 - 17.3, 17.4R1-S1 - 17.4

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External links
https://kb.juniper.net/InfoCenter/index?page=content&id=JSA10953&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.