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alpinelinuxAlpine Linux Development TeamALPINE:CVE-2023-42670
HistoryNov 03, 2023 - 8:15 a.m.

CVE-2023-42670

2023-11-0308:15:07
Alpine Linux Development Team
security.alpinelinux.org
20
samba
vulnerability
ad dc
service
disruptions
rpc
listener
unix domain sockets
active directory users

CVSS3

6.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

AI Score

6

Confidence

Low

EPSS

0.001

Percentile

33.5%

A flaw was found in Samba. It is susceptible to a vulnerability where multiple incompatible RPC listeners can be initiated, causing disruptions in the AD DC service. When Samba’s RPC server experiences a high load or unresponsiveness, servers intended for non-AD DC purposes (for example, NT4-emulation “classic DCs”) can erroneously start and compete for the same unix domain sockets. This issue leads to partial query responses from the AD DC, causing issues such as “The procedure number is out of range” when using tools like Active Directory Users. This flaw allows an attacker to disrupt AD DC services.

CVSS3

6.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

AI Score

6

Confidence

Low

EPSS

0.001

Percentile

33.5%