CVE-2023-34966
Samba: infinite loop in mdssvc rpc service for spotlight
CVSS Score
7.5
EPSS Score
0.0%
EPSS Percentile
0th
An infinite loop vulnerability was found in Samba's mdssvc RPC service for Spotlight. When parsing Spotlight mdssvc RPC packets sent by the client, the core unmarshalling function sl_unpack_loop() did not validate a field in the network packet that contains the count of elements in an array-like structure. By passing 0 as the count value, the attacked function will run in an endless loop consuming 100% CPU. This flaw allows an attacker to issue a malformed RPC request, triggering an infinite loop, resulting in a denial of service condition.
| CWE | CWE-835 |
| Vendor | red hat |
| Product | red hat enterprise linux 8 |
| Published | Jul 20, 2023 |
| Last Updated | Nov 20, 2025 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Affected Versions
Red Hat / Red Hat Enterprise Linux 8
All versions affected Red Hat / Red Hat Enterprise Linux 8
All versions affected Red Hat / Red Hat Enterprise Linux 8.6 Extended Update Support
All versions affected Red Hat / Red Hat Enterprise Linux 8.8 Extended Update Support
All versions affected Red Hat / Red Hat Enterprise Linux 9
All versions affected Red Hat / Red Hat Enterprise Linux 9
All versions affected Red Hat / Red Hat Enterprise Linux 9.2 Extended Update Support
All versions affected Red Hat / Red Hat Virtualization 4 for Red Hat Enterprise Linux 8
All versions affected Red Hat / Red Hat Enterprise Linux 6
All versions affected Red Hat / Red Hat Enterprise Linux 6
All versions affected Red Hat / Red Hat Enterprise Linux 7
All versions affected Red Hat / Red Hat Storage 3
All versions affected References
access.redhat.com: https://access.redhat.com/errata/RHSA-2023:6667 access.redhat.com: https://access.redhat.com/errata/RHSA-2023:7139 access.redhat.com: https://access.redhat.com/errata/RHSA-2024:0423 access.redhat.com: https://access.redhat.com/errata/RHSA-2024:0580 access.redhat.com: https://access.redhat.com/errata/RHSA-2024:4101 access.redhat.com: https://access.redhat.com/security/cve/CVE-2023-34966 bugzilla.redhat.com: https://bugzilla.redhat.com/show_bug.cgi?id=2222793 samba.org: https://www.samba.org/samba/security/CVE-2023-34966 lists.fedoraproject.org: https://lists.fedoraproject.org/archives/list/[email protected]/message/BPCSGND7LO467AJGR5DYBGZLTCGTOBCC/ lists.fedoraproject.org: https://lists.fedoraproject.org/archives/list/[email protected]/message/OT74M42E6C36W7PQVY3OS4ZM7DVYB64Z/ security.netapp.com: https://security.netapp.com/advisory/ntap-20230731-0010/ debian.org: https://www.debian.org/security/2023/dsa-5477