CVE Vulnerabilities

CVE-2018-14629

Uncontrolled Resource Consumption

Published: Nov 28, 2018 | Modified: Nov 21, 2024
CVSS 3.x
6.5
MEDIUM
Source:
NVD
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CVSS 2.x
4 MEDIUM
AV:N/AC:L/Au:S/C:N/I:N/A:P
RedHat/V2
RedHat/V3
6.5 MODERATE
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Ubuntu
MEDIUM

A denial of service vulnerability was discovered in Sambas LDAP server before versions 4.7.12, 4.8.7, and 4.9.3. A CNAME loop could lead to infinite recursion in the server. An unprivileged local attacker could create such an entry, leading to 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
Samba Samba 4.0.0 (including) 4.7.12 (excluding)
Samba Samba 4.8.0 (including) 4.8.7 (excluding)
Samba Samba 4.8.8 (including) 4.9.3 (excluding)
Samba Ubuntu bionic *
Samba Ubuntu cosmic *
Samba Ubuntu devel *
Samba Ubuntu esm-infra-legacy/trusty *
Samba Ubuntu esm-infra/bionic *
Samba Ubuntu esm-infra/xenial *
Samba Ubuntu trusty *
Samba Ubuntu trusty/esm *
Samba Ubuntu upstream *
Samba 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.

References