CVE-2023-34967

Samba: type confusion in mdssvc rpc service for spotlight

publishedCWE-843

A Type Confusion vulnerability was found in Samba's mdssvc RPC service for Spotlight. When parsing Spotlight mdssvc RPC packets, one encoded data structure is a key-value style dictionary where the keys are character strings, and the values can be any of the supported types in the mdssvc protocol. Due to a lack of type checking in callers of the dalloc_value_for_key() function, which returns the object associated with a key, a caller may trigger a crash in talloc_get_size() when talloc detects that the passed-in pointer is not a valid talloc pointer. With an RPC worker process shared among multiple client connections, a malicious client or attacker can trigger a process crash in a shared RPC mdssvc worker process, affecting all other clients this worker serves.

Technical severity5.3 mediumCVSS 3.1 · CNA: redhat

Published2023-07-20Source updated 2026-11-06

Collected2026-11-062 attributed sources

Fixes and workarounds

Workaround

As a possible workaround, disable Spotlight by removing all configuration stanzas ("spotlight=yes|true") that enable Spotlight .

Source: CNA: redhat

Affected products and versions

Affected products, source version ranges and reporting authorities
Product	Versions	Authority
Red Hat Enterprise Linux 8 Red Hat `samba` https://access.redhat.com/downloads/content/package-browser/	≥ 0:4.18.6-1.el8; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 8.6 Extended Update Support Red Hat `samba` https://access.redhat.com/downloads/content/package-browser/	≥ 0:4.15.5-15.el8_6; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 8.8 Extended Update Support Red Hat `samba` https://access.redhat.com/downloads/content/package-browser/	≥ 0:4.17.5-5.el8_8; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 9 Red Hat `samba` https://access.redhat.com/downloads/content/package-browser/	≥ 0:4.18.6-100.el9; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Virtualization 4 for Red Hat Enterprise Linux 8 Red Hat `samba` https://access.redhat.com/downloads/content/package-browser/	≥ 0:4.15.5-15.el8_6; < * (unaffected, rpm) Other versions: affected	CNA: redhat
Red Hat Enterprise Linux 6 Red Hat `samba` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: unknown	CNA: redhat
Red Hat Enterprise Linux 6 Red Hat `samba4` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: unknown	CNA: redhat
Red Hat Enterprise Linux 7 Red Hat `samba` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: unknown	CNA: redhat
Red Hat Storage 3 Red Hat `samba` https://access.redhat.com/downloads/content/package-browser/	Range not reported Other versions: unknown	CNA: redhat

Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.

CVSS assessments

CVSS scores, vectors and reporting authorities
Version / score	Vector	Authority
3.1 / 5.3 medium	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L`	CNA: redhat

Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

References

https://access.redhat.com/errata/RHSA-2023:6667CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2023:7139CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2024:0423CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2024:0580CNA: redhat · vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2023-34967CNA: redhat · vdb-entry, x_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2222794CNA: redhat · issue-tracking, x_refsource_REDHAT
https://www.samba.org/samba/security/CVE-2023-34967.htmlCNA: redhat
https://access.redhat.com/errata/RHSA-2023:6667ADP: CVE · vendor-advisory, x_refsource_REDHAT, x_transferred
https://access.redhat.com/errata/RHSA-2023:7139ADP: CVE · vendor-advisory, x_refsource_REDHAT, x_transferred
https://access.redhat.com/errata/RHSA-2024:0423ADP: CVE · vendor-advisory, x_refsource_REDHAT, x_transferred
https://access.redhat.com/errata/RHSA-2024:0580ADP: CVE · vendor-advisory, x_refsource_REDHAT, x_transferred
https://access.redhat.com/security/cve/CVE-2023-34967ADP: CVE · vdb-entry, x_refsource_REDHAT, x_transferred
https://bugzilla.redhat.com/show_bug.cgi?id=2222794ADP: CVE · issue-tracking, x_refsource_REDHAT, x_transferred
https://lists.fedoraproject.org/archives/list/[email protected]/message/BPCSGND7LO467AJGR5DYBGZLTCGTOBCC/ADP: CVE · x_transferred
https://lists.fedoraproject.org/archives/list/[email protected]/message/OT74M42E6C36W7PQVY3OS4ZM7DVYB64Z/ADP: CVE · x_transferred
https://security.netapp.com/advisory/ntap-20230731-0010/ADP: CVE · x_transferred
https://www.debian.org/security/2023/dsa-5477ADP: CVE · x_transferred
https://www.samba.org/samba/security/CVE-2023-34967.htmlADP: CVE · x_transferred

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