CVE-2019-5737

In Node.js including 6.x before 6.17.0, 8.x before 8.15.1, 10.x before 10.15.2, and 11.x before 11.10.1, an attacker can cause a Denial of Service (DoS) by establishing an HTTP or HTTPS connection in keep-alive mode and by sending headers very slowly. This keeps the connection and associated resources alive for a long period of time. Potential attacks are mitigated by the use of a load balancer or other proxy layer. This vulnerability is an extension of CVE-2018-12121, addressed in November and impacts all active Node.js release lines including 6.x before 6.17.0, 8.x before 8.15.1, 10.x before 10.15.2, and 11.x before 11.10.1.

Weakness

The product does not properly control the allocation and maintenance of a limited resource.

Affected Software

Potential Mitigations

• Mitigation of resource exhaustion attacks requires that the target system either:

• The first of these solutions is an issue in itself though, since it may allow attackers to prevent the use of the system by a particular valid user. If the attacker impersonates the valid user, they may be able to prevent the user from accessing the server in question.

• The second solution is simply difficult to effectively institute – and even when properly done, it does not provide a full solution. It simply makes the attack require more resources on the part of the attacker.

Related Attack Patterns

• https://cwe.mitre.org/data/definitions/147.html
• https://cwe.mitre.org/data/definitions/227.html
• https://cwe.mitre.org/data/definitions/492.html

References

• http://lists.opensuse.org/opensuse-security-announce/2019-03/msg00041.html
• http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00046.html
• http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00059.html
• https://access.redhat.com/errata/RHSA-2019:1821
• https://nodejs.org/en/blog/vulnerability/february-2019-security-releases/
• https://security.gentoo.org/glsa/202003-48
• https://security.netapp.com/advisory/ntap-20190502-0008/
• http://lists.opensuse.org/opensuse-security-announce/2019-03/msg00041.html
• http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00046.html
• http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00059.html
• https://access.redhat.com/errata/RHSA-2019:1821
• https://nodejs.org/en/blog/vulnerability/february-2019-security-releases/
• https://security.gentoo.org/glsa/202003-48
• https://security.netapp.com/advisory/ntap-20190502-0008/