Out-of-bounds read in Juniper Networks Junos OS and Junos OS Evolved



Published: 2021-07-20
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2021-0277
CWE-ID CWE-125
Exploitation vector Local network
Public exploit N/A
Vulnerable software
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Juniper Junos OS
Operating systems & Components / Operating system

Junos OS Evolved
Operating systems & Components / Operating system

Vendor Juniper Networks, Inc.

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Out-of-bounds read

EUVDB-ID: #VU55001

Risk: Low

CVSSv3.1: 5.7 [CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-0277

CWE-ID: CWE-125 - Out-of-bounds read

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 condition in the processing of specially crafted LLDP frames by the Layer 2 Control Protocol Daemon (l2cpd). A remote attacker on the local network can trigger out-of-bounds read error and cause a denial of service condition on the system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Juniper Junos OS: 12.3 - 20.4

Junos OS Evolved: 20.4 - 20.4R1-S2-EVO

External links

http://kb.juniper.net/JSA11181


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.



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