Vulnerability Details : 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.
Vulnerability category: Denial of service
Products affected by CVE-2023-34966
- cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*
- cpe:2.3:o:debian:debian_linux:12.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*
- cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*
- cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*
- cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:38:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2023-34966
12.90%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 96 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2023-34966
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
7.5
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
3.9
|
3.6
|
NIST | |
|
7.5
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
3.9
|
3.6
|
Red Hat, Inc. |
CWE ids for CVE-2023-34966
-
The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop.Assigned by:
- nvd@nist.gov (Primary)
- secalert@redhat.com (Secondary)
References for CVE-2023-34966
-
https://www.debian.org/security/2023/dsa-5477
Debian -- Security Information -- DSA-5477-1 sambaThird Party Advisory
-
https://security.netapp.com/advisory/ntap-20230731-0010/
July 2023 Samba Vulnerabilities in NetApp Products | NetApp Product SecurityThird Party Advisory
-
https://bugzilla.redhat.com/show_bug.cgi?id=2222793
2222793 – (CVE-2023-34966) CVE-2023-34966 samba: infinite loop in mdssvc RPC service for spotlightIssue Tracking;Third Party Advisory
-
https://access.redhat.com/errata/RHSA-2024:0423
RHSA-2024:0423 - Security Advisory - Red Hat Customer Portal
-
https://access.redhat.com/errata/RHSA-2023:7139
RHSA-2023:7139 - Security Advisory - Red Hat Customer PortalThird Party Advisory
-
https://access.redhat.com/security/cve/CVE-2023-34966
CVE-2023-34966- Red Hat Customer PortalThird Party Advisory
-
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/BPCSGND7LO467AJGR5DYBGZLTCGTOBCC/
[SECURITY] Fedora 38 Update: samba-4.18.5-0.fc38 - package-announce - Fedora Mailing-ListsMailing List
-
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OT74M42E6C36W7PQVY3OS4ZM7DVYB64Z/
[SECURITY] Fedora 37 Update: samba-4.17.10-0.fc37 - package-announce - Fedora Mailing-ListsMailing List
-
https://access.redhat.com/errata/RHSA-2024:0580
RHSA-2024:0580 - Security Advisory - Red Hat Customer Portal
-
https://access.redhat.com/errata/RHSA-2024:4101
RHSA-2024:4101 - Security Advisory - Red Hat Customer Portal
-
https://access.redhat.com/errata/RHSA-2023:6667
RHSA-2023:6667 - Security Advisory - Red Hat 客户门户网站Third Party Advisory
-
https://www.samba.org/samba/security/CVE-2023-34966
Samba - Security Announcement ArchiveVendor Advisory
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