Attacker Value
Unknown
(0 users assessed)
Exploitability
Unknown
(0 users assessed)
User Interaction
None
Privileges Required
None
Attack Vector
Network
0

CVE-2023-3961

Disclosure Date: November 03, 2023 •
CVE-2023-3961 CVSS v3 Base Score: 9.8
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Description

A path traversal vulnerability was identified in Samba when processing client pipe names connecting to Unix domain sockets within a private directory. Samba typically uses this mechanism to connect SMB clients to remote procedure call (RPC) services like SAMR LSA or SPOOLSS, which Samba initiates on demand. However, due to inadequate sanitization of incoming client pipe names, allowing a client to send a pipe name containing Unix directory traversal characters (../). This could result in SMB clients connecting as root to Unix domain sockets outside the private directory. If an attacker or client managed to send a pipe name resolving to an external service using an existing Unix domain socket, it could potentially lead to unauthorized access to the service and consequential adverse events, including compromise or service crashes.

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CVSS V3 Severity and Metrics
Base Score:
9.8 Critical
Impact Score:
5.9
Exploitability Score:
3.9
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector (AV):
Network
Attack Complexity (AC):
Low
Privileges Required (PR):
None
User Interaction (UI):
None
Scope (S):
Unchanged
Confidentiality (C):
High
Integrity (I):
High
Availability (A):
High

General Information

Offensive Application
Unknown
Utility Class
Unknown
Ports
Unknown
OS
Unknown
Vulnerable Versions
Red Hat Enterprise Linux 8 not down converted
Red Hat Enterprise Linux 8 not down converted
Red Hat Enterprise Linux 8.6 Extended Update Support not down converted
Red Hat Enterprise Linux 8.8 Extended Update Support not down converted
Red Hat Enterprise Linux 9 not down converted
Red Hat Enterprise Linux 9 not down converted
Red Hat Enterprise Linux 9.0 Extended Update Support not down converted
Red Hat Enterprise Linux 9.2 Extended Update Support not down converted
Red Hat Virtualization 4 for Red Hat Enterprise Linux 8 not down converted
Red Hat Enterprise Linux 6 not down converted
Red Hat Enterprise Linux 6 not down converted
Red Hat Enterprise Linux 7 not down converted
Red Hat Storage 3 not down converted
Prerequisites
Unknown
Discovered By
Unknown
PoC Author
Unknown
Metasploit Module
Unknown
Reporter
Unknown

Vendors

  • fedoraproject,
  • redhat,
  • samba

Products

  • enterprise linux 8.0,
  • enterprise linux eus 9.0,
  • fedora 39,
  • samba,
  • storage 3.0
Technical Analysis