Resource exhaustion in Juniper Junos
CVE-2019-0031
Specific IPv6 DHCP packets received by the jdhcpd daemon will cause a memory resource consumption issue to occur on a Junos OS device using the jdhcpd daemon configured to respond to IPv6 requests. Once started, memory consumption will eventually impact any IPv4 or IPv6 request serviced by the jdhcpd daemon, thus creating a Denial of Service (DoS) condition to clients requesting and not receiving IP addresses. Additionally, some clients which were previously holding IPv6 addresses will not have their IPv6 Identity Association (IA) address and network tables agreed upon by the jdhcpd daemon after the failover event occurs, which leads to more than one interface, and multiple IP addresses, being denied on the client. Affected releases are Juniper Networks Junos OS: 17.4 versions prior to 17.4R2; 18.1 versions prior to 18.1R2.
Vulnerability class: DoS (Denial of Service)
EPSS: 0.017 (74.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Juniper Junos
- Juniper Networks Junos Os — versions 17.4, 18.1
Weakness classification (CWE)
References
- sirt@juniper.net (x_refsource_CONFIRM, Vendor Advisory)
- sirt@juniper.net (VDB Entry, Third Party Advisory, vdb-entry, x_refsource_BID)
Frequently asked questions
- What is CVE-2019-0031?
- CVE-2019-0031 is a high-severity vulnerability in Juniper Junos, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2019-04-10.
- How severe is CVE-2019-0031?
- High severity. CVSS v3 base score is 7.5 out of 10.