Vulnerability in Samba
CVE-2023-34967
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.
EPSS exploit prediction
EPSS: 0.612 (99.2th percentile), scored .
High probability of exploitation in the next 30 days — patch promptly. 99th percentile — 99.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.612 · newest: 0.612 · change: 0.000
Affected products
- Samba
- Debian Linux — versions 11.0, 12.0
- Fedoraproject Fedora — versions 37, 38
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8 — versions 0:4.18.6-1.el8
- Red Hat Enterprise Linux 8.6 Extended Update Support — versions 0:4.15.5-15.el8_6
- Red Hat Enterprise Linux 8.8 Extended Update Support — versions 0:4.17.5-5.el8_8
- Red Hat Enterprise Linux 9 — versions 0:4.18.6-100.el9
- Red Hat Storage 3
Weakness classification (CWE)
References
- access.redhat.com/errata/RHSA-2023:6667 (vendor-advisory, Third Party Advisory)
- access.redhat.com/errata/RHSA-2023:7139 (vendor-advisory, Third Party Advisory)
- access.redhat.com/errata/RHSA-2024:0423 (vendor-advisory)
- access.redhat.com/errata/RHSA-2024:0580 (vendor-advisory)
- access.redhat.com/security/cve/CVE-2023-34967 (Third Party Advisory, vdb-entry)
- bugzilla.redhat.com/show_bug.cgi (issue-tracking, Issue Tracking)
- www.samba.org/samba/security/CVE-2023-34967.html (Vendor Advisory)
- af854a3a-2127-422b-91ae-364da2661108
- af854a3a-2127-422b-91ae-364da2661108
- af854a3a-2127-422b-91ae-364da2661108
Frequently asked questions
- What is CVE-2023-34967?
- CVE-2023-34967 is a medium-severity vulnerability in Samba, classified under Access of Resource Using Incompatible Type (Type Confusion). CVSS score: 5.3/10. Published 2023-07-20.
- How severe is CVE-2023-34967?
- Medium severity. CVSS v3 base score is 5.3 out of 10.