Vulnerability Description
An Improper Input Validation vulnerability in the active-lease query portion in JDHCPD's DHCP Relay Agent of Juniper Networks Junos OS allows an attacker to cause a Denial of Service (DoS) by sending a crafted DHCP packet to the device thereby crashing the jdhcpd DHCP service. This is typically configured for Broadband Subscriber Sessions. Continued receipt and processing of this crafted packet will create a sustained Denial of Service (DoS) condition. This issue affects Juniper Networks Junos OS: 19.4 versions prior to 19.4R3-S1; 20.1 versions prior to 20.1R2-S1, 20.1R3; 20.2 versions prior to 20.2R3; 20.3 versions prior to 20.3R2. This issue does not affect Junos OS Evolved.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Juniper | Junos | 19.4 |
Related Weaknesses (CWE)
References
- https://kb.juniper.net/JSA11158Vendor Advisory
- https://www.juniper.net/documentation/us/en/software/junos/subscriber-mgmt-sessiVendor Advisory
- https://kb.juniper.net/JSA11158Vendor Advisory
- https://www.juniper.net/documentation/us/en/software/junos/subscriber-mgmt-sessiVendor Advisory
FAQ
What is CVE-2021-0267?
CVE-2021-0267 is a vulnerability with a CVSS score of 7.4 (HIGH). An Improper Input Validation vulnerability in the active-lease query portion in JDHCPD's DHCP Relay Agent of Juniper Networks Junos OS allows an attacker to cause a Denial of Service (DoS) by sending ...
How severe is CVE-2021-0267?
CVE-2021-0267 has been rated HIGH with a CVSS base score of 7.4/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-0267?
Check the references section above for vendor advisories and patch information. Affected products include: Juniper Junos.