Vulnerability · Published Jul 20, 2023 · Assigned by redhat
CVE-2023-34966Samba: infinite loop in mdssvc rpc service for spotlight
High 7.5
In plain English
A high-severity infinite loop in Red Hat Enterprise Linux 6 from Red Hat. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 62.4% (higher than 99.2% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)7.5High
Exploit odds (30 days)62.4%top 0.8% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:8 | ctdb | 4.18.6-1.el8 | ALSA-2023:7139 |
| AlmaLinux:9 | ctdb | 4.18.6-100.el9 | ALSA-2023:6667 |
| AlmaLinux:8 | libnetapi | 4.18.6-1.el8 | ALSA-2023:7139 |
| AlmaLinux:9 | libnetapi | 4.18.6-100.el9 | ALSA-2023:6667 |
| AlmaLinux:8 | libnetapi-devel | 4.18.6-1.el8 | ALSA-2023:7139 |
| AlmaLinux:9 | libnetapi-devel | 4.18.6-100.el9 | ALSA-2023:6667 |
| AlmaLinux:8 | libsmbclient | 4.18.6-1.el8 | ALSA-2023:7139 |
| AlmaLinux:9 | libsmbclient | 4.18.6-100.el9 | ALSA-2023:6667 |
| AlmaLinux:8 | libsmbclient-devel | 4.18.6-1.el8 | ALSA-2023:7139 |
| AlmaLinux:9 | libsmbclient-devel | 4.18.6-100.el9 | ALSA-2023:6667 |
| AlmaLinux:8 | libwbclient | 4.18.6-1.el8 | ALSA-2023:7139 |
| AlmaLinux:9 | libwbclient | 4.18.6-100.el9 | ALSA-2023:6667 |
| AlmaLinux:8 | libwbclient-devel | 4.18.6-1.el8 | ALSA-2023:7139 |
| AlmaLinux:9 | libwbclient-devel | 4.18.6-100.el9 | ALSA-2023:6667 |
| AlmaLinux:8 | python3-samba | 4.18.6-1.el8 | ALSA-2023:7139 |
| AlmaLinux:9 | python3-samba | 4.18.6-100.el9 | ALSA-2023:6667 |
| AlmaLinux:8 | python3-samba-dc | 4.18.6-1.el8 | ALSA-2023:7139 |
| AlmaLinux:9 | python3-samba-dc | 4.18.6-100.el9 | ALSA-2023:6667 |
| AlmaLinux:8 | python3-samba-devel | 4.18.6-1.el8 | ALSA-2023:7139 |
| AlmaLinux:9 | python3-samba-devel | 4.18.6-100.el9 | ALSA-2023:6667 |
| AlmaLinux:8 | python3-samba-test | 4.18.6-1.el8 | ALSA-2023:7139 |
| AlmaLinux:9 | python3-samba-test | 4.18.6-100.el9 | ALSA-2023:6667 |
| AlmaLinux:8 | samba | 4.18.6-1.el8 | ALSA-2023:7139 |
| AlmaLinux:9 | samba | 4.18.6-100.el9 | ALSA-2023:6667 |
| AlmaLinux:8 | samba-client | 4.18.6-1.el8 | ALSA-2023:7139 |
| AlmaLinux:9 | samba-client | 4.18.6-100.el9 | ALSA-2023:6667 |
| AlmaLinux:8 | samba-client-libs | 4.18.6-1.el8 | ALSA-2023:7139 |
| AlmaLinux:9 | samba-client-libs | 4.18.6-100.el9 | ALSA-2023:6667 |
| AlmaLinux:8 | samba-common | 4.18.6-1.el8 | ALSA-2023:7139 |
| AlmaLinux:9 | samba-common | 4.18.6-100.el9 | ALSA-2023:6667 |
| AlmaLinux:8 | samba-common-libs | 4.18.6-1.el8 | ALSA-2023:7139 |
| AlmaLinux:9 | samba-common-libs | 4.18.6-100.el9 | ALSA-2023:6667 |
| AlmaLinux:8 | samba-common-tools | 4.18.6-1.el8 | ALSA-2023:7139 |
| AlmaLinux:9 | samba-common-tools | 4.18.6-100.el9 | ALSA-2023:6667 |
| AlmaLinux:8 | samba-dc-libs | 4.18.6-1.el8 | ALSA-2023:7139 |
| AlmaLinux:9 | samba-dc-libs | 4.18.6-100.el9 | ALSA-2023:6667 |
| AlmaLinux:8 | samba-dcerpc | 4.18.6-1.el8 | ALSA-2023:7139 |
| AlmaLinux:9 | samba-dcerpc | 4.18.6-100.el9 | ALSA-2023:6667 |
| AlmaLinux:8 | samba-devel | 4.18.6-1.el8 | ALSA-2023:7139 |
| AlmaLinux:9 | samba-devel | 4.18.6-100.el9 | ALSA-2023:6667 |
| AlmaLinux:8 | samba-krb5-printing | 4.18.6-1.el8 | ALSA-2023:7139 |
| AlmaLinux:9 | samba-krb5-printing | 4.18.6-100.el9 | ALSA-2023:6667 |
| AlmaLinux:8 | samba-ldb-ldap-modules | 4.18.6-1.el8 | ALSA-2023:7139 |
| AlmaLinux:9 | samba-ldb-ldap-modules | 4.18.6-100.el9 | ALSA-2023:6667 |
| AlmaLinux:8 | samba-libs | 4.18.6-1.el8 | ALSA-2023:7139 |
| AlmaLinux:9 | samba-libs | 4.18.6-100.el9 | ALSA-2023:6667 |
| AlmaLinux:8 | samba-pidl | 4.18.6-1.el8 | ALSA-2023:7139 |
| AlmaLinux:9 | samba-pidl | 4.18.6-100.el9 | ALSA-2023:6667 |
| AlmaLinux:8 | samba-test | 4.18.6-1.el8 | ALSA-2023:7139 |
| AlmaLinux:9 | samba-test | 4.18.6-100.el9 | ALSA-2023:6667 |
| AlmaLinux:8 | samba-test-libs | 4.18.6-1.el8 | ALSA-2023:7139 |
| AlmaLinux:9 | samba-test-libs | 4.18.6-100.el9 | ALSA-2023:6667 |
| AlmaLinux:8 | samba-tools | 4.18.6-1.el8 | ALSA-2023:7139 |
| AlmaLinux:9 | samba-tools | 4.18.6-100.el9 | ALSA-2023:6667 |
| AlmaLinux:8 | samba-usershares | 4.18.6-1.el8 | ALSA-2023:7139 |
| AlmaLinux:9 | samba-usershares | 4.18.6-100.el9 | ALSA-2023:6667 |
| AlmaLinux:8 | samba-vfs-iouring | 4.18.6-1.el8 | ALSA-2023:7139 |
| AlmaLinux:9 | samba-vfs-iouring | 4.18.6-100.el9 | ALSA-2023:6667 |
| AlmaLinux:8 | samba-winbind | 4.18.6-1.el8 | ALSA-2023:7139 |
| AlmaLinux:9 | samba-winbind | 4.18.6-100.el9 | ALSA-2023:6667 |
| AlmaLinux:8 | samba-winbind-clients | 4.18.6-1.el8 | ALSA-2023:7139 |
| AlmaLinux:9 | samba-winbind-clients | 4.18.6-100.el9 | ALSA-2023:6667 |
| AlmaLinux:8 | samba-winbind-krb5-locator | 4.18.6-1.el8 | ALSA-2023:7139 |
| AlmaLinux:9 | samba-winbind-krb5-locator | 4.18.6-100.el9 | ALSA-2023:6667 |
| AlmaLinux:8 | samba-winbind-modules | 4.18.6-1.el8 | ALSA-2023:7139 |
| AlmaLinux:9 | samba-winbind-modules | 4.18.6-100.el9 | ALSA-2023:6667 |
| AlmaLinux:8 | samba-winexe | 4.18.6-1.el8 | ALSA-2023:7139 |
| AlmaLinux:9 | samba-winexe | 4.18.6-100.el9 | ALSA-2023:6667 |
| Debian:12 | samba | 2:4.17.10+dfsg-0+deb12u1 | DSA-5477-1 |
| Debian:12 | samba | 2:4.17.10+dfsg-0+deb12u1 | DEBIAN-CVE-2023-34966 |
| Debian:13 | samba | 2:4.18.5+dfsg-1 | DEBIAN-CVE-2023-34966 |
| Debian:14 | samba | 2:4.18.5+dfsg-1 | DEBIAN-CVE-2023-34966 |
| Rocky Linux:8 | evolution-mapi | 0:3.28.3-8.el8 | RLSA-2023:7139 |
| Rocky Linux:8 | openchange | 0:2.3-32.el8 | RLSA-2023:7139 |
| Ubuntu:22.04:LTS | samba | 2:4.15.13+dfsg-0ubuntu1.2 | USN-6238-1 |
| Ubuntu:22.04:LTS | samba | 2:4.15.13+dfsg-0ubuntu1.2 | UBUNTU-CVE-2023-34966 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Red Hat | Red Hat Enterprise Linux 8 | see references |
| Red Hat | Red Hat Enterprise Linux 8 | see references |
| Red Hat | Red Hat Enterprise Linux 8.6 Extended Update Support | see references |
| Red Hat | Red Hat Enterprise Linux 8.8 Extended Update Support | see references |
| Red Hat | Red Hat Enterprise Linux 9 | see references |
| Red Hat | Red Hat Enterprise Linux 9 | see references |
| Red Hat | Red Hat Enterprise Linux 9.2 Extended Update Support | see references |
| Red Hat | Red Hat Virtualization 4 for Red Hat Enterprise Linux 8 | see references |
| Red Hat | Red Hat Enterprise Linux 6 | see references |
| Red Hat | Red Hat Enterprise Linux 6 | see references |
| Red Hat | Red Hat Enterprise Linux 7 | see references |
| Red Hat | Red Hat Storage 3 | see references |
Weakness: CWE-835 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
References
- RHSA-2023:6667 vendor-advisory, x_refsource_REDHAT
- RHSA-2023:7139 vendor-advisory, x_refsource_REDHAT
- RHSA-2024:0423 vendor-advisory, x_refsource_REDHAT
- RHSA-2024:0580 vendor-advisory, x_refsource_REDHAT
- RHSA-2024:4101 vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/security/cve/CVE-2023-34966 vdb-entry, x_refsource_REDHAT
- RHBZ#2222793 issue-tracking, x_refsource_REDHAT
- https://www.samba.org/samba/security/CVE-2023-34966
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/BPCSGND7LO467AJGR5DYBGZLTCGTOBCC/ x_transferred
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OT74M42E6C36W7PQVY3OS4ZM7DVYB64Z/ x_transferred
- https://security.netapp.com/advisory/ntap-20230731-0010/ x_transferred
- https://www.debian.org/security/2023/dsa-5477 x_transferred