CVE-2023-34966

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-835
• CWE-835

• https://access.redhat.com/errata/RHSA-2023:6667Third Party Advisory
• https://access.redhat.com/errata/RHSA-2023:7139Third Party Advisory
• https://access.redhat.com/errata/RHSA-2024:0423
• https://access.redhat.com/errata/RHSA-2024:0580
• https://access.redhat.com/errata/RHSA-2024:4101
• https://access.redhat.com/security/cve/CVE-2023-34966Third Party Advisory
• https://bugzilla.redhat.com/show_bug.cgi?id=2222793Issue Tracking, Third Party Advisory
• https://www.samba.org/samba/security/CVE-2023-34966Vendor Advisory
• https://access.redhat.com/errata/RHSA-2023:6667Third Party Advisory
• https://access.redhat.com/errata/RHSA-2023:7139Third Party Advisory
• https://access.redhat.com/errata/RHSA-2024:0423
• https://access.redhat.com/errata/RHSA-2024:0580
• https://access.redhat.com/errata/RHSA-2024:4101
• https://access.redhat.com/security/cve/CVE-2023-34966Third Party Advisory
• https://bugzilla.redhat.com/show_bug.cgi?id=2222793Issue Tracking, Third Party Advisory
• https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/BPCSGND7LO467AJGR5DYBGZLTCGTOBCC/
• https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OT74M42E6C36W7PQVY3OS4ZM7DVYB64Z/
• https://security.netapp.com/advisory/ntap-20230731-0010/
• https://www.debian.org/security/2023/dsa-5477
• https://www.samba.org/samba/security/CVE-2023-34966Vendor Advisory

Published

Jul 20, 2023

Last Modified

Jun 17, 2026

Status

Modified

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