Denial of service when processing BGP messages in Junos OS and Junos OS Evolved
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2021-0211 |
| CWE-ID | CWE-20 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software Subscribe |
Junos OS Evolved Operating systems & Components / Operating system Juniper Junos OS Operating systems & Components / Operating system |
| Vendor | Juniper Networks, Inc. |
Security Bulletin
This security bulletin contains one medium risk vulnerability.
1) Input validation error
EUVDB-ID: #VU49553
Risk: Medium
CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2021-0211
CWE-ID:
CWE-20 - Improper input validation
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to insufficient validation of user-supplied input when processing BGP mesages. A remote attacker can send a valid BGP FlowSpec message and perform a denial of service (DoS) attack.
MitigationInstall updates from vendor's website.
Vulnerable software versionsJunos OS Evolved: 20.3 - 20.4
Juniper Junos OS: 15.1 - 20.4
External linkshttp://kb.juniper.net/InfoCenter/index?page=content&id=JSA11101&cat=SIRT_1&actp=LIST
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.
