Security Bulletin: Multiple vulnerabilities in samba affects IBM Storage Scale SMB protocol access method

Summary

Multiple samba vulnerabilities affects IBM Storage Scale SMB protocol access method that could allow denial of the service on the system. The fix for this is available.

Vulnerability Details

CVEID:CVE-2023-34967
**DESCRIPTION:**Samba is vulnerable to a denial of service, caused by a type confusion flaw in the dalloc_value_for_key() function. By sending specially crafted Spotlight mdssvc RPC packets, a remote attacker could exploit this vulnerability to cause the worker process to crash.
CVSS Base score: 5.3
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/261221 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L)

CVEID:CVE-2023-34968
**DESCRIPTION:**Samba could allow a remote attacker to obtain sensitive information, caused by a flaw in the Spotlight protocol. By sending a specially crafted RPC request, an attacker could exploit this vulnerability to obtain the real server-side share path information, and use this information to launch further attacks against the affected system.
CVSS Base score: 5.3
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/261222 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N)

CVEID:CVE-2023-3347
**DESCRIPTION:**Samba is vulnerable to a man-in-the-middle attack, caused by a flaw in the SMB2 packet signing mechanism. An attacker could exploit this vulnerability to launch a man-in-the-middle attack and gain access to the communication channel to modify the SMB2 messages between client and server.
CVSS Base score: 6.8
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/261216 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:N)

CVEID:CVE-2023-34966
**DESCRIPTION:**Samba is vulnerable to a denial of service, caused by improper input validation by the sl_unpack_loop() function. By sending specially crafted Spotlight mdssvc RPC packets, a remote attacker could exploit this vulnerability to consume available CPU resources and results in a denial of service condition.
CVSS Base score: 7.5
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/261220 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)

Affected Products and Versions

Remediation/Fixes

For IBM Spectrum Scale V5.1.0.0 through V5.1.8.1, apply

V5.1.8.2 or later available from FixCentral at:

https://www.ibm.com/support/fixcentral/swg/selectFixes?parent=Software%20defined%20storage&product=ibm/StorageSoftware/IBM+Storage+Scale&release=5.1.8&platform=All&function=all

V5.1.9.0 or later available from FixCentral at:

https://www.ibm.com/support/fixcentral/swg/selectFixes?parent=Software%20defined%20storage&product=ibm/StorageSoftware/IBM+Storage+Scale&release=5.1.9&platform=All&function=all

Workarounds and Mitigations

None