Vulnerability Name:

CVE-2019-0031 (CCN-159297)

Assigned:2018-10-11
Published:2019-04-10
Updated:2020-09-29
Summary: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.
CVSS v3 Severity:7.5 High (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
6.5 Medium (Temporal CVSS v3.1 Vector: 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)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): High
7.4 High (CCN CVSS v3.1 Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H)
6.4 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Adjacent
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Changed
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): High
CVSS v2 Severity:5.0 Medium (CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Authentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Partial
6.1 Medium (CCN CVSS v2 Vector: AV:A/AC:L/Au:N/C:N/I:N/A:C)
Exploitability Metrics:Access Vector (AV): Adjacent_Network
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Complete
Vulnerability Type:CWE-770
Vulnerability Consequences:Denial of Service
References:Source: MITRE
Type: CNA
CVE-2019-0031

Source: BID
Type: Third Party Advisory, VDB Entry
107874

Source: XF
Type: UNKNOWN
juniper-cve20190031-dos(159297)

Source: CCN
Type: Juniper Networks Security Bulletin JSA10920
Junos OS: jdhcpd daemon memory consumption Denial of Service when receiving specific IPv6 DHCP packets. (CVE-2019-0031)

Source: CONFIRM
Type: Vendor Advisory
https://kb.juniper.net/JSA10920

Vulnerable Configuration:Configuration 1:
  • cpe:/o:juniper:junos:*:*:*:*:*:*:*:* (Version >= 18.1 and < 18.1r2)
  • OR cpe:/o:juniper:junos:*:*:*:*:*:*:*:* (Version >= 17.4 and < 17.4r2)

    • Configuration CCN 1:
  • cpe:/a:juniper:junos:18.1:-:*:*:*:*:*:*
  • OR cpe:/o:juniper:junos:17.4:-:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    BACK
    juniper junos *
    juniper junos *
    juniper junos 18.1 -
    juniper junos 17.4 -