Vulnerabilities
Misconfiguration
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CVE Vulnerabilities

CVE-2020-10745

Uncontrolled Resource Consumption

Published: Jul 07, 2020 | Modified: Nov 21, 2024
CVSS 3.x
7.5
HIGH
Source:
NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 2.x
7.8 HIGH
AV:N/AC:L/Au:N/C:N/I:N/A:C
RedHat/V2
RedHat/V3
7.5 IMPORTANT
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Ubuntu
MEDIUM
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Additional information
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2020-10745
CWEhttps://cwe.mitre.org/data/definitions/400.html

A flaw was found in all Samba versions before 4.10.17, before 4.11.11 and before 4.12.4 in the way it processed NetBios over TCP/IP. This flaw allows a remote attacker could to cause the Samba server to consume excessive CPU use, resulting in a denial of service. This highest threat from this vulnerability is to system availability.

Weakness

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

Affected Software

NameVendorStart VersionEnd Version
SambaSamba4.0.0 (including)4.10.17 (excluding)
SambaSamba4.11.0 (including)4.11.11 (excluding)
SambaSamba4.12.0 (including)4.12.4 (excluding)
SambaUbuntubionic*
SambaUbuntudevel*
SambaUbuntueoan*
SambaUbuntuesm-infra-legacy/trusty*
SambaUbuntuesm-infra/bionic*
SambaUbuntuesm-infra/focal*
SambaUbuntuesm-infra/xenial*
SambaUbuntufocal*
SambaUbuntutrusty*
SambaUbuntutrusty/esm*
SambaUbuntuupstream*
SambaUbuntuxenial*

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

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