CVE-2018-14648

A flaw was found in 389 Directory Server. A specially crafted search query could lead to excessive CPU consumption in the do_search() function. An unauthenticated attacker could use this flaw to provoke a denial of service.

Weakness

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

Affected Software

Name	Vendor	Start Version	End Version
389_directory_server	Fedoraproject	*	1.4.0.17 (excluding)
Red Hat Enterprise Linux 7	RedHat	389-ds-base-0:1.3.8.4-15.el7	*
Red Hat Enterprise Linux 7.5 Extended Update Support	RedHat	389-ds-base-0:1.3.7.5-29.el7_5	*
389-ds-base	Ubuntu	bionic	*
389-ds-base	Ubuntu	cosmic	*
389-ds-base	Ubuntu	esm-apps/bionic	*
389-ds-base	Ubuntu	esm-apps/xenial	*
389-ds-base	Ubuntu	trusty	*
389-ds-base	Ubuntu	upstream	*
389-ds-base	Ubuntu	xenial	*

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.

NVD	https://nvd.nist.gov/vuln/detail/CVE-2018-14648
CWE	https://cwe.mitre.org/data/definitions/400.html

Uncontrolled Resource Consumption

Weakness

Affected Software

Potential Mitigations

References

CVE-2018-14648

Uncontrolled Resource Consumption

Weakness

Affected Software

Potential Mitigations

Related Attack Patterns

References