#VU57359 Memory leak in Juniper Junos OS and PTX Series - CVE-2021-31367

Vulnerability identifier: #VU57359

Vulnerability risk: Low

CVSSv4.0: 4.9 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-31367

CWE-ID: CWE-401

Exploitation vector: Local network

Exploit availability: No

Vulnerable software:
Juniper Junos OS
Operating systems & Components / Operating system
PTX Series
Hardware solutions / Firmware

Vendor: Juniper Networks, Inc.

Description
The vulnerability allows a remote attacker to perform DoS attack on the target system.

The vulnerability exists due memory leak in the Packet Forwarding Engine (PFE). A remote attacker on the local network can force the application to leak memory and perform denial of service attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Juniper Junos OS: 18.4R1-S1 - 18.4R3, 19.1R - 19.1R3, 19.2R1-S1 - 19.2R3, 19.3R1-S1 - 19.3R3, 19.4R1-S1 - 19.4R3, 20.1R1-S1 - 20.1R2, 20.2R1-S1 - 20.2R3, 20.3R1-S1 - 20.3R2, 20.4R1-S1 - 20.4R2, 21.1R1-S1 - 21.1R1

PTX Series: All versions

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External links
https://kb.juniper.net/InfoCenter/index?page=content&id=JSA11229&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 local network (LAN).

Is there known malware, which exploits this vulnerability?

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