Buffer overflow in TCP/IP stack in Juniper Networks Junos OS

Published: 2021-07-19

Risk	Medium
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2021-0283 CVE-2021-0284
CWE-ID	CWE-119
Exploitation vector	Network
Public exploit	N/A
Vulnerable software	Juniper Junos OS Operating systems & Components / Operating system
Vendor	Juniper Networks, Inc.

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Buffer overflow

EUVDB-ID: #VU54993

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-2021-0283

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary error within the Juniper Junos OS TCP/IP stack. A remote attacker can send specific sequences of packets to the device, trigger memory corruption and perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Juniper Junos OS: 12.3R12-S1 - 21.2R1

CPE2.3

External links

https://kb.juniper.net/JSA11200

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.

2) Buffer overflow

EUVDB-ID: #VU54994