Vulnerability · Published Jul 20, 2023 · Assigned by redhat
CVE-2023-3347Samba: smb2 packet signing is not enforced when "server signing = required" is set
Medium 5.9
In plain English
A medium-severity security flaw 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 0.4% (higher than 38% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)5.9Medium
Exploit odds (30 days)0.4%top 62.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
A vulnerability was found in Samba's SMB2 packet signing mechanism. The SMB2 packet signing is not enforced if an admin configured "server signing = required" or for SMB2 connections to Domain Controllers where SMB2 packet signing is mandatory. This flaw allows an attacker to perform attacks, such as a man-in-the-middle attack, by intercepting the network traffic and modifying the SMB2 messages between client and server, affecting the integrity of the data.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:8 | ctdb | 4.17.5-3.el8_8.alma | ALSA-2023:4328 |
| AlmaLinux:9 | ctdb | 4.17.5-103.el9_2.alma | ALSA-2023:4325 |
| AlmaLinux:8 | libnetapi | 4.17.5-3.el8_8.alma | ALSA-2023:4328 |
| AlmaLinux:9 | libnetapi | 4.17.5-103.el9_2.alma | ALSA-2023:4325 |
| AlmaLinux:8 | libnetapi-devel | 4.17.5-3.el8_8.alma | ALSA-2023:4328 |
| AlmaLinux:9 | libnetapi-devel | 4.17.5-103.el9_2.alma | ALSA-2023:4325 |
| AlmaLinux:8 | libsmbclient | 4.17.5-3.el8_8.alma | ALSA-2023:4328 |
| AlmaLinux:9 | libsmbclient | 4.17.5-103.el9_2.alma | ALSA-2023:4325 |
| AlmaLinux:8 | libsmbclient-devel | 4.17.5-3.el8_8.alma | ALSA-2023:4328 |
| AlmaLinux:9 | libsmbclient-devel | 4.17.5-103.el9_2.alma | ALSA-2023:4325 |
| AlmaLinux:8 | libwbclient | 4.17.5-3.el8_8.alma | ALSA-2023:4328 |
| AlmaLinux:9 | libwbclient | 4.17.5-103.el9_2.alma | ALSA-2023:4325 |
| AlmaLinux:8 | libwbclient-devel | 4.17.5-3.el8_8.alma | ALSA-2023:4328 |
| AlmaLinux:9 | libwbclient-devel | 4.17.5-103.el9_2.alma | ALSA-2023:4325 |
| AlmaLinux:8 | python3-samba | 4.17.5-3.el8_8.alma | ALSA-2023:4328 |
| AlmaLinux:9 | python3-samba | 4.17.5-103.el9_2.alma | ALSA-2023:4325 |
| AlmaLinux:8 | python3-samba-dc | 4.17.5-3.el8_8.alma | ALSA-2023:4328 |
| AlmaLinux:9 | python3-samba-dc | 4.17.5-103.el9_2.alma | ALSA-2023:4325 |
| AlmaLinux:8 | python3-samba-devel | 4.17.5-3.el8_8.alma | ALSA-2023:4328 |
| AlmaLinux:9 | python3-samba-devel | 4.17.5-103.el9_2.alma | ALSA-2023:4325 |
| AlmaLinux:8 | python3-samba-test | 4.17.5-3.el8_8.alma | ALSA-2023:4328 |
| AlmaLinux:9 | python3-samba-test | 4.17.5-103.el9_2.alma | ALSA-2023:4325 |
| AlmaLinux:8 | samba | 4.17.5-3.el8_8.alma | ALSA-2023:4328 |
| AlmaLinux:9 | samba | 4.17.5-103.el9_2.alma | ALSA-2023:4325 |
| AlmaLinux:8 | samba-client | 4.17.5-3.el8_8.alma | ALSA-2023:4328 |
| AlmaLinux:9 | samba-client | 4.17.5-103.el9_2.alma | ALSA-2023:4325 |
| AlmaLinux:8 | samba-client-libs | 4.17.5-3.el8_8.alma | ALSA-2023:4328 |
| AlmaLinux:9 | samba-client-libs | 4.17.5-103.el9_2.alma | ALSA-2023:4325 |
| AlmaLinux:8 | samba-common | 4.17.5-3.el8_8.alma | ALSA-2023:4328 |
| AlmaLinux:9 | samba-common | 4.17.5-103.el9_2.alma | ALSA-2023:4325 |
| AlmaLinux:8 | samba-common-libs | 4.17.5-3.el8_8.alma | ALSA-2023:4328 |
| AlmaLinux:9 | samba-common-libs | 4.17.5-103.el9_2.alma | ALSA-2023:4325 |
| AlmaLinux:8 | samba-common-tools | 4.17.5-3.el8_8.alma | ALSA-2023:4328 |
| AlmaLinux:9 | samba-common-tools | 4.17.5-103.el9_2.alma | ALSA-2023:4325 |
| AlmaLinux:8 | samba-dc-libs | 4.17.5-3.el8_8.alma | ALSA-2023:4328 |
| AlmaLinux:9 | samba-dc-libs | 4.17.5-103.el9_2.alma | ALSA-2023:4325 |
| AlmaLinux:8 | samba-dcerpc | 4.17.5-3.el8_8.alma | ALSA-2023:4328 |
| AlmaLinux:9 | samba-dcerpc | 4.17.5-103.el9_2.alma | ALSA-2023:4325 |
| AlmaLinux:8 | samba-devel | 4.17.5-3.el8_8.alma | ALSA-2023:4328 |
| AlmaLinux:9 | samba-devel | 4.17.5-103.el9_2.alma | ALSA-2023:4325 |
| AlmaLinux:8 | samba-krb5-printing | 4.17.5-3.el8_8.alma | ALSA-2023:4328 |
| AlmaLinux:9 | samba-krb5-printing | 4.17.5-103.el9_2.alma | ALSA-2023:4325 |
| AlmaLinux:8 | samba-ldb-ldap-modules | 4.17.5-3.el8_8.alma | ALSA-2023:4328 |
| AlmaLinux:9 | samba-ldb-ldap-modules | 4.17.5-103.el9_2.alma | ALSA-2023:4325 |
| AlmaLinux:8 | samba-libs | 4.17.5-3.el8_8.alma | ALSA-2023:4328 |
| AlmaLinux:9 | samba-libs | 4.17.5-103.el9_2.alma | ALSA-2023:4325 |
| AlmaLinux:8 | samba-pidl | 4.17.5-3.el8_8.alma | ALSA-2023:4328 |
| AlmaLinux:9 | samba-pidl | 4.17.5-103.el9_2.alma | ALSA-2023:4325 |
| AlmaLinux:8 | samba-test | 4.17.5-3.el8_8.alma | ALSA-2023:4328 |
| AlmaLinux:9 | samba-test | 4.17.5-103.el9_2.alma | ALSA-2023:4325 |
| AlmaLinux:8 | samba-test-libs | 4.17.5-3.el8_8.alma | ALSA-2023:4328 |
| AlmaLinux:9 | samba-test-libs | 4.17.5-103.el9_2.alma | ALSA-2023:4325 |
| AlmaLinux:8 | samba-tools | 4.17.5-3.el8_8.alma | ALSA-2023:4328 |
| AlmaLinux:9 | samba-tools | 4.17.5-103.el9_2.alma | ALSA-2023:4325 |
| AlmaLinux:8 | samba-usershares | 4.17.5-3.el8_8.alma | ALSA-2023:4328 |
| AlmaLinux:9 | samba-usershares | 4.17.5-103.el9_2.alma | ALSA-2023:4325 |
| AlmaLinux:8 | samba-vfs-iouring | 4.17.5-3.el8_8.alma | ALSA-2023:4328 |
| AlmaLinux:9 | samba-vfs-iouring | 4.17.5-103.el9_2.alma | ALSA-2023:4325 |
| AlmaLinux:8 | samba-winbind | 4.17.5-3.el8_8.alma | ALSA-2023:4328 |
| AlmaLinux:9 | samba-winbind | 4.17.5-103.el9_2.alma | ALSA-2023:4325 |
| AlmaLinux:8 | samba-winbind-clients | 4.17.5-3.el8_8.alma | ALSA-2023:4328 |
| AlmaLinux:9 | samba-winbind-clients | 4.17.5-103.el9_2.alma | ALSA-2023:4325 |
| AlmaLinux:8 | samba-winbind-krb5-locator | 4.17.5-3.el8_8.alma | ALSA-2023:4328 |
| AlmaLinux:9 | samba-winbind-krb5-locator | 4.17.5-103.el9_2.alma | ALSA-2023:4325 |
| AlmaLinux:8 | samba-winbind-modules | 4.17.5-3.el8_8.alma | ALSA-2023:4328 |
| AlmaLinux:9 | samba-winbind-modules | 4.17.5-103.el9_2.alma | ALSA-2023:4325 |
| AlmaLinux:8 | samba-winexe | 4.17.5-3.el8_8.alma | ALSA-2023:4328 |
| AlmaLinux:9 | samba-winexe | 4.17.5-103.el9_2.alma | ALSA-2023:4325 |
| Debian:12 | samba | 2:4.17.10+dfsg-0+deb12u1 | DEBIAN-CVE-2023-3347 |
| Debian:12 | samba | 2:4.17.10+dfsg-0+deb12u1 | DSA-5477-1 |
| Debian:13 | samba | 2:4.18.5+dfsg-1 | DEBIAN-CVE-2023-3347 |
| Debian:14 | samba | 2:4.18.5+dfsg-1 | DEBIAN-CVE-2023-3347 |
| 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-0ubuntu1.1 | UBUNTU-CVE-2023-3347 |
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 9 | see references |
| Red Hat | Red Hat Enterprise Linux 9 | 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-347, CWE-924 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
References
- RHSA-2023:4325 vendor-advisory, x_refsource_REDHAT
- RHSA-2023:4328 vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/security/cve/CVE-2023-3347 vdb-entry, x_refsource_REDHAT
- RHBZ#2222792 issue-tracking, x_refsource_REDHAT
- https://www.samba.org/samba/security/CVE-2023-3347.html
- 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