CVE-2023-34966
What it is
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.
At a glance
- Exploitability
- Can be exploited over the network without logging in. High risk of service disruption.
- Exploit odds
- 62.4% chance of exploitation in the next 30 days (EPSS). Higher than most.
- Fix
- A patch, advisory or fixed version is referenced. Upgrade or apply it.
Timeline
- PublishedDisclosed publicly on CVE.org and NVD
- Last updatedMost recent change to the record
Why it ranks here
- Exploited in the wild: no, CISA does not list it.
- Exploit odds: 62.4% in the next 30 days (EPSS).
- Severity: 7.5 HIGH (CVSS).
- Fix: a patch or advisory is linked.
Details
- Published
- Last modified
- Exploit probability
- 62.4% · EPSS, next 30 days
- Weakness
- CWE-835
- Record status
- Modified
Affected
- Samba < 4.16.11
- Samba < 4.17.10
- Samba < 4.18.5
- Fedoraproject Fedora 37
- Fedoraproject Fedora 38
- Redhat Enterprise Linux 8.0
- Redhat Enterprise Linux 9.0
- Debian Linux 11.0
Attack profile CVSS 3.1 · 7.5
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Raw vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Is it in your code?
Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.
Read https://cve-list.com/agent/cve/CVE-2023-34966.md and follow it. Check whether this project is affected by CVE-2023-34966. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.
Fix and advisories
- https://www.samba.org/samba/security/CVE-2023-34966
- https://www.samba.org/samba/security/CVE-2023-34966
References
- https://access.redhat.com/errata/RHSA-2023:6667
- https://access.redhat.com/errata/RHSA-2023:7139
- 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-2023-34966
- https://bugzilla.redhat.com/show_bug.cgi?id=2222793
- https://www.samba.org/samba/security/CVE-2023-34966
- https://access.redhat.com/errata/RHSA-2023:6667
- https://access.redhat.com/errata/RHSA-2023:7139
- 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-2023-34966
- https://bugzilla.redhat.com/show_bug.cgi?id=2222793
- https://lists.fedoraproject.org/archives/list/[email protected]/message/BPCSGND7LO467AJGR5DYBGZLTCGTOBCC/
- https://lists.fedoraproject.org/archives/list/[email protected]/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-2023-34966