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Fencer Vulns
medium 6.5

CVE-2019-14907 json

All samba versions 4.9.x before 4.9.18, 4.10.x before 4.10.12 and 4.11.x before 4.11.5 have an issue where if it is set with "log level = 3…

published 2020-01-21 6 y ago modified 2026-06-17 4 mo ago also EUVD-2019-6010

cvss
6.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
3.2%
EPSS 3.2% chance of exploitation in 30 days, percentile 88%
public exploits
0
none known

Summary

All samba versions 4.9.x before 4.9.18, 4.10.x before 4.10.12 and 4.11.x before 4.11.5 have an issue where if it is set with "log level = 3" (or above) then the string obtained from the client, after a failed character conversion, is printed. Such strings can be provided during the NTLMSSP authentication exchange. In the Samba AD DC in particular, this may cause a long-lived process(such as the RPC server) to terminate. (In the file server case, the most likely target, smbd, operates as process-per-client and so a crash there is harmless).

Patch / fix

  • samba samba 4.9.18, 4.10.12, 4.11.5
  • samba Debian 14, Debian 13, Debian 12 2:4.11.5+dfsg-1

debian advisories DEBIAN-CVE-2019-14907

  • samba Ubuntu 16.04 LTS 2:4.3.11+dfsg-0ubuntu0.16.04.25
  • samba Ubuntu 18.04 LTS 2:4.7.6+dfsg~ubuntu-0ubuntu2.15
  • samba Ubuntu 20.04 LTS 2:4.11.5+dfsg-1ubuntu1

ubuntu advisories UBUNTU-CVE-2019-14907

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • samba RHEL 7 4.10.16-5.el7
  • ctdb RHEL 7 4.10.16-5.el7
  • samba-dc RHEL 7 4.10.16-5.el7
  • ctdb-tests RHEL 7 4.10.16-5.el7
  • samba-libs RHEL 7 4.10.16-5.el7
  • samba-pidl RHEL 7 4.10.16-5.el7
  • samba-test RHEL 7 4.10.16-5.el7
  • libwbclient RHEL 7 4.10.16-5.el7

red hat advisories RHSA-2020:3981RHSA-2020:1878RHSA-2020:0943

  • samba SLES for SAP 12 SP5, SLES 12 SP5, SLE Software Development Kit 12 SP5 +1 more 4.10.17+git.203.862547088ca-3.14.1
  • ldb SLES for SAP 12 SP5, SLES 12 SP5, SLE Software Development Kit 12 SP5 1.5.8-3.5.1
  • samba SLES for SAP 12 SP4, SLES for SAP 12 SP3, SLES 12 SP4 +10 more 4.6.16+git.174.c2fd2e28c84-3.49.1
  • samba SLES for SAP 15, SLES 15-LTSS, SLE Module for Package Hub 15 +4 more 4.7.11+git.218.58b95cbfc0f-4.37.1
  • samba SLE Module for Python 2 15 SP1, SLE Module for Basesystem 15 SP1, SLE High Availability Extension 15 SP1 +1 more 4.9.5+git.243.e76c5cb3d97-3.21.1
  • samba SLES for SAP 12 SP5, SLES 12 SP5, SLE Software Development Kit 12 SP5 +1 more 4.10.5+git.134.674d33703a6-3.3.1

suse advisories SUSE-SU-2020:2673-1SUSE-SU-2020:0233-1SUSE-SU-2020:0224-1SUSE-SU-2020:0223-1SUSE-SU-2020:0152-1

  • samba openSUSE Tumbleweed 4.14.6+git.182.2205d5224e3-1.1
  • samba openSUSE Leap 15.1 4.9.5+git.243.e76c5cb3d97-lp151.2.15.1

opensuse advisories openSUSE-SU-2024:11365-1openSUSE-SU-2020:0122-1

  • samba Alpine 3.10 4.10.12-r0
  • samba Alpine 3.24, Alpine 3.23, Alpine 3.22 +11 more 4.11.5-r0
  • samba Alpine 3.9, Alpine 3.8 4.8.12-r2

alpine advisories ALPINE-CVE-2019-14907

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2019-14907 updated cvss 6.5

samba: Crash after failed character conversion at log level 3 or above

  • Red Hat CodeReady Linux Builder (v. 8) ctdb-debuginfo 4.11.2-13.el8, samba-debuginfo 4.11.2-13.el8, libwbclient-devel 4.11.2-13.el8, samba-debugsource 4.11.2-13.el8, libsmbclient-devel 4.11.2-13.el8, ctdb-tests-debuginfo 4.11.2-13.el8, +16 more Red Hat Enterprise Linux AppStream (v. 8) openchange 2.3-24.el8 Red Hat Enterprise Linux BaseOS (v. 8) ctdb 4.11.2-13.el8, samba 4.11.2-13.el8, ctdb-tests 4.11.2-13.el8, samba-libs 4.11.2-13.el8, samba-pidl 4.11.2-13.el8, samba-test 4.11.2-13.el8, +15 more
    fixed: vendor fix “Do not set a log level of 3 or above in production.” RHSA-2020:1878
  • Red Hat Enterprise Linux Client (v. 7) samba 4.10.16-5.el7, samba-libs 4.10.16-5.el7, libwbclient 4.10.16-5.el7, libsmbclient 4.10.16-5.el7, samba-client 4.10.16-5.el7, samba-common 4.10.16-5.el7, +7 more Red Hat Enterprise Linux Client Optional (v. 7) samba 4.10.16-5.el7, samba-dc 4.10.16-5.el7, samba-pidl 4.10.16-5.el7, samba-test 4.10.16-5.el7, samba-python 4.10.16-5.el7, samba-dc-libs 4.10.16-5.el7, +4 more Red Hat Enterprise Linux ComputeNode (v. 7) samba 4.10.16-5.el7, samba-libs 4.10.16-5.el7, libwbclient 4.10.16-5.el7, libsmbclient 4.10.16-5.el7, samba-client 4.10.16-5.el7, samba-common 4.10.16-5.el7, +6 more Red Hat Enterprise Linux ComputeNode Optional (v. 7) samba 4.10.16-5.el7, samba-dc 4.10.16-5.el7, samba-pidl 4.10.16-5.el7, samba-test 4.10.16-5.el7, samba-python 4.10.16-5.el7, samba-dc-libs 4.10.16-5.el7, +5 more Red Hat Enterprise Linux Server (v. 7) samba 4.10.16-5.el7, samba-libs 4.10.16-5.el7, libwbclient 4.10.16-5.el7, libsmbclient 4.10.16-5.el7, samba-client 4.10.16-5.el7, samba-common 4.10.16-5.el7, +8 more Red Hat Enterprise Linux Server Optional (v. 7) samba-dc 4.10.16-5.el7, samba-pidl 4.10.16-5.el7, samba-test 4.10.16-5.el7, samba-python 4.10.16-5.el7, samba-dc-libs 4.10.16-5.el7, samba-test-libs 4.10.16-5.el7, +3 more
    +3 more products
    Red Hat Enterprise Linux Server Resilient Storage (v. 7) ctdb 4.10.16-5.el7, ctdb-tests 4.10.16-5.el7 Red Hat Enterprise Linux Workstation (v. 7) samba 4.10.16-5.el7, samba-libs 4.10.16-5.el7, libwbclient 4.10.16-5.el7, libsmbclient 4.10.16-5.el7, samba-client 4.10.16-5.el7, samba-common 4.10.16-5.el7, +8 more Red Hat Enterprise Linux Workstation Optional (v. 7) samba-dc 4.10.16-5.el7, samba-pidl 4.10.16-5.el7, samba-test 4.10.16-5.el7, samba-dc-libs 4.10.16-5.el7, samba-test-libs 4.10.16-5.el7, samba-python-test 4.10.16-5.el7, +2 more
    fixed: vendor fix “Do not set a log level of 3 or above in production.” RHSA-2020:3981
  • Red Hat Gluster 3.5 Samba on RHEL-7 libtdb 1.4.2-4.el7rhgs, ctdb 4.11.6-104.el7rhgs, samba 4.11.6-104.el7rhgs, libtalloc 2.2.0-9.el7rhgs, tdb-tools 1.4.2-4.el7rhgs, libtevent 0.10.0-4.el7rhgs, +19 more
    fixed: vendor fix “Do not set a log level of 3 or above in production.” RHSA-2020:0943
  • Red Hat Enterprise Linux 5 samba Red Hat Enterprise Linux 6 samba, samba4, samba4-dc, samba-swat, samba4-libs, samba4-pidl, +17 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

3.15% chance of exploitation in the next 30 days, higher than 88% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
NVD 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
NVD 2.0 2.6 AV:N/AC:H/Au:N/C:N/I:N/A:P

Affected products

  • Red Hat samba

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.