Medium severity5.9NVD Advisory· Published Jul 20, 2023· Updated Jun 17, 2026
CVE-2023-3347
CVE-2023-3347
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
49cpe:/a:redhat:enterprise_linux:9::appstream+ 5 more
- cpe:/a:redhat:enterprise_linux:9::appstreamrange: 0:4.17.5-103.el9_2
- cpe:/o:redhat:enterprise_linux:6
- cpe:/o:redhat:enterprise_linux:7
- cpe:/o:redhat:enterprise_linux:8::baseosrange: 0:4.17.5-3.el8_8
- cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*
- cpe:/a:redhat:storage:3
cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*range: >=4.17.0,<4.17.10
- (no CPE)
- cpe:2.3:o:fedoraproject:fedora:38:*:*:*:*:*:*:*
- osv-coords38 versionspkg:rpm/almalinux/ctdbpkg:rpm/almalinux/libnetapipkg:rpm/almalinux/libnetapi-develpkg:rpm/almalinux/libsmbclientpkg:rpm/almalinux/libsmbclient-develpkg:rpm/almalinux/libwbclientpkg:rpm/almalinux/libwbclient-develpkg:rpm/almalinux/python3-sambapkg:rpm/almalinux/python3-samba-dcpkg:rpm/almalinux/python3-samba-develpkg:rpm/almalinux/python3-samba-testpkg:rpm/almalinux/sambapkg:rpm/almalinux/samba-clientpkg:rpm/almalinux/samba-client-libspkg:rpm/almalinux/samba-commonpkg:rpm/almalinux/samba-common-libspkg:rpm/almalinux/samba-common-toolspkg:rpm/almalinux/samba-dc-libspkg:rpm/almalinux/samba-dcerpcpkg:rpm/almalinux/samba-develpkg:rpm/almalinux/samba-krb5-printingpkg:rpm/almalinux/samba-ldb-ldap-modulespkg:rpm/almalinux/samba-libspkg:rpm/almalinux/samba-pidlpkg:rpm/almalinux/samba-testpkg:rpm/almalinux/samba-test-libspkg:rpm/almalinux/samba-toolspkg:rpm/almalinux/samba-usersharespkg:rpm/almalinux/samba-vfs-iouringpkg:rpm/almalinux/samba-winbindpkg:rpm/almalinux/samba-winbind-clientspkg:rpm/almalinux/samba-winbind-krb5-locatorpkg:rpm/almalinux/samba-winbind-modulespkg:rpm/almalinux/samba-winexepkg:rpm/opensuse/samba&distro=openSUSE%20Leap%2015.5pkg:rpm/opensuse/samba&distro=openSUSE%20Tumbleweedpkg:rpm/suse/samba&distro=SUSE%20Linux%20Enterprise%20High%20Availability%20Extension%2015%20SP5pkg:rpm/suse/samba&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP5
< 4.17.5-103.el9_2.alma+ 37 more
- (no CPE)range: < 4.17.5-103.el9_2.alma
- (no CPE)range: < 4.17.5-103.el9_2.alma
- (no CPE)range: < 4.17.5-103.el9_2.alma
- (no CPE)range: < 4.17.5-103.el9_2.alma
- (no CPE)range: < 4.17.5-103.el9_2.alma
- (no CPE)range: < 4.17.5-103.el9_2.alma
- (no CPE)range: < 4.17.5-103.el9_2.alma
- (no CPE)range: < 4.17.5-103.el9_2.alma
- (no CPE)range: < 4.17.5-103.el9_2.alma
- (no CPE)range: < 4.17.5-103.el9_2.alma
- (no CPE)range: < 4.17.5-103.el9_2.alma
- (no CPE)range: < 4.17.5-103.el9_2.alma
- (no CPE)range: < 4.17.5-103.el9_2.alma
- (no CPE)range: < 4.17.5-103.el9_2.alma
- (no CPE)range: < 4.17.5-103.el9_2.alma
- (no CPE)range: < 4.17.5-103.el9_2.alma
- (no CPE)range: < 4.17.5-103.el9_2.alma
- (no CPE)range: < 4.17.5-103.el9_2.alma
- (no CPE)range: < 4.17.5-103.el9_2.alma
- (no CPE)range: < 4.17.5-103.el9_2.alma
- (no CPE)range: < 4.17.5-103.el9_2.alma
- (no CPE)range: < 4.17.5-103.el9_2.alma
- (no CPE)range: < 4.17.5-103.el9_2.alma
- (no CPE)range: < 4.17.5-103.el9_2.alma
- (no CPE)range: < 4.17.5-103.el9_2.alma
- (no CPE)range: < 4.17.5-103.el9_2.alma
- (no CPE)range: < 4.17.5-103.el9_2.alma
- (no CPE)range: < 4.17.5-103.el9_2.alma
- (no CPE)range: < 4.17.5-103.el9_2.alma
- (no CPE)range: < 4.17.5-103.el9_2.alma
- (no CPE)range: < 4.17.5-103.el9_2.alma
- (no CPE)range: < 4.17.5-103.el9_2.alma
- (no CPE)range: < 4.17.5-103.el9_2.alma
- (no CPE)range: < 4.17.5-103.el9_2.alma
- (no CPE)range: < 4.17.9+git.367.dae41ffdd1f-150500.3.5.1
- (no CPE)range: < 4.18.5+git.313.c8e274c7852-1.1
- (no CPE)range: < 4.17.9+git.367.dae41ffdd1f-150500.3.5.1
- (no CPE)range: < 4.17.9+git.367.dae41ffdd1f-150500.3.5.1
Patches
Vulnerability mechanics
References
9- access.redhat.com/errata/RHSA-2023:4325nvdThird Party Advisory
- access.redhat.com/errata/RHSA-2023:4328nvdThird Party Advisory
- access.redhat.com/security/cve/CVE-2023-3347nvdThird Party Advisory
- bugzilla.redhat.com/show_bug.cginvdIssue TrackingThird Party Advisory
- www.samba.org/samba/security/CVE-2023-3347.htmlnvdVendor Advisory
- lists.fedoraproject.org/archives/list/[email protected]/message/BPCSGND7LO467AJGR5DYBGZLTCGTOBCC/nvd
- lists.fedoraproject.org/archives/list/[email protected]/message/OT74M42E6C36W7PQVY3OS4ZM7DVYB64Z/nvd
- security.netapp.com/advisory/ntap-20230731-0010/nvd
- www.debian.org/security/2023/dsa-5477nvd
News mentions
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