01 Record

CVE-2023-3347

Samba: smb2 packet signing is not enforced when "server signing = required" is set

MediumPUBLISHEDCNA: redhat

CNA base score5.9 CVSS v3.xCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

View raw JSON

02 Description

Samba: smb2 packet signing is not enforced when "server signing = required" is set

03 Exploitation and scoring

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.43% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 37.5% of scored records. A rank, not a probability.

NVD base score

5.9 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

Red Hat severity

Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published

2023-07-20 14:54Z3 YR AGO

Last updated

2025-11-20 17:26Z11 MO AGO

Reserved

2023-06-21

Assigning CNA

redhat

Record state

PUBLISHED

Severity

Medium (CVSS 5.9)

CNA CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

Weaknesses

CWE-347Improper Verification of Cryptographic SignatureBase
CWE-924Improper Enforcement of Message Integrity During Transmission in a Communication ChannelBase

Data version

5.2

Document digest

e66143cac04e6fbc68c89e054886e1046b56a6cb6ffbea64371efab28d94be5a

05 Affected products

VendorProductVersionsPlatforms

Red HatRed Hat Enterprise Linux 8Not specified—

Red HatRed Hat Enterprise Linux 9Not specified—

Red HatRed Hat Enterprise Linux 6Not specified—

Red HatRed Hat Enterprise Linux 7Not specified—

Red HatRed Hat Storage 3Not specified—

06 References

access.redhat.comRHSA-2023:4325https://access.redhat.com/errata/RHSA-2023:4325vendor-advisoryx_refsource_REDHAT
access.redhat.comRHSA-2023:4328https://access.redhat.com/errata/RHSA-2023:4328vendor-advisoryx_refsource_REDHAT
access.redhat.comhttps://access.redhat.com/security/cve/CVE-2023-3347vdb-entryx_refsource_REDHAT
bugzilla.redhat.comRHBZ#2222792https://bugzilla.redhat.com/show_bug.cgi?id=2222792issue-trackingx_refsource_REDHAT
www.samba.orghttps://www.samba.org/samba/security/CVE-2023-3347.html
lists.fedoraproject.orghttps://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/BPCSGND7LO467AJGR5DYBGZLTCGTOBCC/
lists.fedoraproject.orghttps://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OT74M42E6C36W7PQVY3OS4ZM7DVYB64Z/
security.netapp.comhttps://security.netapp.com/advisory/ntap-20230731-0010/
www.debian.orghttps://www.debian.org/security/2023/dsa-5477

07 Fixed in

AlmaLinux 8

ctdb
Fixed in 4.17.5-3.el8_8.alma
libnetapi
Fixed in 4.17.5-3.el8_8.alma
libnetapi-devel
Fixed in 4.17.5-3.el8_8.alma
libsmbclient
Fixed in 4.17.5-3.el8_8.alma
libsmbclient-devel
Fixed in 4.17.5-3.el8_8.alma
libwbclient
Fixed in 4.17.5-3.el8_8.alma
libwbclient-devel
Fixed in 4.17.5-3.el8_8.alma
python3-samba
Fixed in 4.17.5-3.el8_8.alma
python3-samba-dc
Fixed in 4.17.5-3.el8_8.alma
python3-samba-devel
Fixed in 4.17.5-3.el8_8.alma
python3-samba-test
Fixed in 4.17.5-3.el8_8.alma
samba
Fixed in 4.17.5-3.el8_8.alma
samba-client
Fixed in 4.17.5-3.el8_8.alma
samba-client-libs
Fixed in 4.17.5-3.el8_8.alma
samba-common
Fixed in 4.17.5-3.el8_8.alma
samba-common-libs
Fixed in 4.17.5-3.el8_8.alma
samba-common-tools
Fixed in 4.17.5-3.el8_8.alma
samba-dc-libs
Fixed in 4.17.5-3.el8_8.alma
samba-dcerpc
Fixed in 4.17.5-3.el8_8.alma
samba-devel
Fixed in 4.17.5-3.el8_8.alma
samba-krb5-printing
Fixed in 4.17.5-3.el8_8.alma
samba-ldb-ldap-modules
Fixed in 4.17.5-3.el8_8.alma
samba-libs
Fixed in 4.17.5-3.el8_8.alma
samba-pidl
Fixed in 4.17.5-3.el8_8.alma
samba-test
Fixed in 4.17.5-3.el8_8.alma
samba-test-libs
Fixed in 4.17.5-3.el8_8.alma
samba-tools
Fixed in 4.17.5-3.el8_8.alma
samba-usershares
Fixed in 4.17.5-3.el8_8.alma
samba-vfs-iouring
Fixed in 4.17.5-3.el8_8.alma
samba-winbind
Fixed in 4.17.5-3.el8_8.alma
samba-winbind-clients
Fixed in 4.17.5-3.el8_8.alma
samba-winbind-krb5-locator
Fixed in 4.17.5-3.el8_8.alma
samba-winbind-modules
Fixed in 4.17.5-3.el8_8.alma
samba-winexe
Fixed in 4.17.5-3.el8_8.alma

AlmaLinux 9

ctdb
Fixed in 4.17.5-103.el9_2.alma
libnetapi
Fixed in 4.17.5-103.el9_2.alma
libnetapi-devel
Fixed in 4.17.5-103.el9_2.alma
libsmbclient
Fixed in 4.17.5-103.el9_2.alma
libsmbclient-devel
Fixed in 4.17.5-103.el9_2.alma
libwbclient
Fixed in 4.17.5-103.el9_2.alma
libwbclient-devel
Fixed in 4.17.5-103.el9_2.alma
python3-samba
Fixed in 4.17.5-103.el9_2.alma
python3-samba-dc
Fixed in 4.17.5-103.el9_2.alma
python3-samba-devel
Fixed in 4.17.5-103.el9_2.alma
python3-samba-test
Fixed in 4.17.5-103.el9_2.alma
samba
Fixed in 4.17.5-103.el9_2.alma
samba-client
Fixed in 4.17.5-103.el9_2.alma
samba-client-libs
Fixed in 4.17.5-103.el9_2.alma
samba-common
Fixed in 4.17.5-103.el9_2.alma
samba-common-libs
Fixed in 4.17.5-103.el9_2.alma
samba-common-tools
Fixed in 4.17.5-103.el9_2.alma
samba-dc-libs
Fixed in 4.17.5-103.el9_2.alma
samba-dcerpc
Fixed in 4.17.5-103.el9_2.alma
samba-devel
Fixed in 4.17.5-103.el9_2.alma
samba-krb5-printing
Fixed in 4.17.5-103.el9_2.alma
samba-ldb-ldap-modules
Fixed in 4.17.5-103.el9_2.alma
samba-libs
Fixed in 4.17.5-103.el9_2.alma
samba-pidl
Fixed in 4.17.5-103.el9_2.alma
samba-test
Fixed in 4.17.5-103.el9_2.alma
samba-test-libs
Fixed in 4.17.5-103.el9_2.alma
samba-tools
Fixed in 4.17.5-103.el9_2.alma
samba-usershares
Fixed in 4.17.5-103.el9_2.alma
samba-vfs-iouring
Fixed in 4.17.5-103.el9_2.alma
samba-winbind
Fixed in 4.17.5-103.el9_2.alma
samba-winbind-clients
Fixed in 4.17.5-103.el9_2.alma
samba-winbind-krb5-locator
Fixed in 4.17.5-103.el9_2.alma
samba-winbind-modules
Fixed in 4.17.5-103.el9_2.alma
samba-winexe
Fixed in 4.17.5-103.el9_2.alma

CloudLinux 8

ctdb
Fixed in 4.17.5-3.el8_8.alma
libnetapi
Fixed in 4.17.5-3.el8_8.alma
libnetapi-devel
Fixed in 4.17.5-3.el8_8.alma
libsmbclient
Fixed in 4.17.5-3.el8_8.alma
libsmbclient-devel
Fixed in 4.17.5-3.el8_8.alma
libwbclient
Fixed in 4.17.5-3.el8_8.alma
libwbclient-devel
Fixed in 4.17.5-3.el8_8.alma
python3-samba
Fixed in 4.17.5-3.el8_8.alma
python3-samba-dc
Fixed in 4.17.5-3.el8_8.alma
python3-samba-devel
Fixed in 4.17.5-3.el8_8.alma
python3-samba-test
Fixed in 4.17.5-3.el8_8.alma
samba
Fixed in 4.17.5-3.el8_8.alma
samba-client
Fixed in 4.17.5-3.el8_8.alma
samba-client-libs
Fixed in 4.17.5-3.el8_8.alma
samba-common
Fixed in 4.17.5-3.el8_8.alma
samba-common-libs
Fixed in 4.17.5-3.el8_8.alma
samba-common-tools
Fixed in 4.17.5-3.el8_8.alma
samba-dc-libs
Fixed in 4.17.5-3.el8_8.alma
samba-dcerpc
Fixed in 4.17.5-3.el8_8.alma
samba-devel
Fixed in 4.17.5-3.el8_8.alma
samba-krb5-printing
Fixed in 4.17.5-3.el8_8.alma
samba-ldb-ldap-modules
Fixed in 4.17.5-3.el8_8.alma
samba-libs
Fixed in 4.17.5-3.el8_8.alma
samba-pidl
Fixed in 4.17.5-3.el8_8.alma
samba-test
Fixed in 4.17.5-3.el8_8.alma
samba-test-libs
Fixed in 4.17.5-3.el8_8.alma
samba-tools
Fixed in 4.17.5-3.el8_8.alma
samba-usershares
Fixed in 4.17.5-3.el8_8.alma
samba-vfs-iouring
Fixed in 4.17.5-3.el8_8.alma
samba-winbind
Fixed in 4.17.5-3.el8_8.alma
samba-winbind-clients
Fixed in 4.17.5-3.el8_8.alma
samba-winbind-krb5-locator
Fixed in 4.17.5-3.el8_8.alma
samba-winbind-modules
Fixed in 4.17.5-3.el8_8.alma
samba-winexe
Fixed in 4.17.5-3.el8_8.alma

Derived from AlmaLinux 8. Partial coverage: only packages taken from AlmaLinux 8 are listed.

CloudLinux 9

ctdb
Fixed in 4.17.5-103.el9_2.alma
libnetapi
Fixed in 4.17.5-103.el9_2.alma
libnetapi-devel
Fixed in 4.17.5-103.el9_2.alma
libsmbclient
Fixed in 4.17.5-103.el9_2.alma
libsmbclient-devel
Fixed in 4.17.5-103.el9_2.alma
libwbclient
Fixed in 4.17.5-103.el9_2.alma
libwbclient-devel
Fixed in 4.17.5-103.el9_2.alma
python3-samba
Fixed in 4.17.5-103.el9_2.alma
python3-samba-dc
Fixed in 4.17.5-103.el9_2.alma
python3-samba-devel
Fixed in 4.17.5-103.el9_2.alma
python3-samba-test
Fixed in 4.17.5-103.el9_2.alma
samba
Fixed in 4.17.5-103.el9_2.alma
samba-client
Fixed in 4.17.5-103.el9_2.alma
samba-client-libs
Fixed in 4.17.5-103.el9_2.alma
samba-common
Fixed in 4.17.5-103.el9_2.alma
samba-common-libs
Fixed in 4.17.5-103.el9_2.alma
samba-common-tools
Fixed in 4.17.5-103.el9_2.alma
samba-dc-libs
Fixed in 4.17.5-103.el9_2.alma
samba-dcerpc
Fixed in 4.17.5-103.el9_2.alma
samba-devel
Fixed in 4.17.5-103.el9_2.alma
samba-krb5-printing
Fixed in 4.17.5-103.el9_2.alma
samba-ldb-ldap-modules
Fixed in 4.17.5-103.el9_2.alma
samba-libs
Fixed in 4.17.5-103.el9_2.alma
samba-pidl
Fixed in 4.17.5-103.el9_2.alma
samba-test
Fixed in 4.17.5-103.el9_2.alma
samba-test-libs
Fixed in 4.17.5-103.el9_2.alma
samba-tools
Fixed in 4.17.5-103.el9_2.alma
samba-usershares
Fixed in 4.17.5-103.el9_2.alma
samba-vfs-iouring
Fixed in 4.17.5-103.el9_2.alma
samba-winbind
Fixed in 4.17.5-103.el9_2.alma
samba-winbind-clients
Fixed in 4.17.5-103.el9_2.alma
samba-winbind-krb5-locator
Fixed in 4.17.5-103.el9_2.alma
samba-winbind-modules
Fixed in 4.17.5-103.el9_2.alma
samba-winexe
Fixed in 4.17.5-103.el9_2.alma

Derived from AlmaLinux 9. Partial coverage: only packages taken from AlmaLinux 9 are listed.

Debian 12

samba
Fixed in 2:4.17.10+dfsg-0+deb12u1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 13

samba
Fixed in 2:4.18.5+dfsg-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 14

samba
Fixed in 2:4.18.5+dfsg-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.