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.
Workaround:
The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop.
| Link | Tags |
|---|---|
| https://access.redhat.com/errata/RHSA-2023:6667 | third party advisory vendor advisory |
| https://access.redhat.com/errata/RHSA-2023:7139 | third party advisory vendor advisory |
| https://access.redhat.com/errata/RHSA-2024:0423 | vendor advisory |
| https://access.redhat.com/errata/RHSA-2024:0580 | vendor advisory |
| https://access.redhat.com/errata/RHSA-2024:4101 | vendor advisory |
| https://access.redhat.com/security/cve/CVE-2023-34966 | third party advisory vdb entry |
| https://bugzilla.redhat.com/show_bug.cgi?id=2222793 | third party advisory issue tracking |
| https://www.samba.org/samba/security/CVE-2023-34966 | vendor 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 |