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Fencer Vulns
high 7.0

CVE-2019-9755 json

An integer underflow issue exists in ntfs-3g 2017.3.23.

published 2019-06-05 7 y ago modified 2026-06-17 4 mo ago also EUVD-2019-19118

cvss
7.0
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 45%
public exploits
0
none known

Summary

An integer underflow issue exists in ntfs-3g 2017.3.23. A local attacker could potentially exploit this by running /bin/ntfs-3g with specially crafted arguments from a specially crafted directory to cause a heap buffer overflow, resulting in a crash or the ability to execute arbitrary code. In installations where /bin/ntfs-3g is a setuid-root binary, this could lead to a local escalation of privileges.

Patch / fix

  • ntfs-3g Debian 14, Debian 13, Debian 12 1:2017.3.23AR.3-3

debian advisories DEBIAN-CVE-2019-9755

  • ntfs-3g Ubuntu 16.04 LTS 1:2015.3.14AR.1-1ubuntu0.2
  • ntfs-3g Ubuntu 18.04 LTS 1:2017.3.23-2ubuntu0.18.04.1

ubuntu advisories UBUNTU-CVE-2019-9755

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

  • SLOF RHEL 8 20171214-6.gitfa98132.module+el8.1.0+4066+0f1aadab
  • hivex RHEL 8 1.3.15-7.module+el8.1.0+4066+0f1aadab
  • netcf RHEL 8 0.2.8-12.module+el8.1.0+4066+0f1aadab
  • nbdkit RHEL 8 1.4.2-5.module+el8.1.0+4066+0f1aadab
  • libvirt RHEL 8 4.5.0-35.module+el8.1.0+4227+b2722cb3
  • seabios RHEL 8 1.11.1-4.module+el8.1.0+4066+0f1aadab
  • sgabios RHEL 8 1:0.20170427git-3.module+el8.1.0+4066+0f1aadab
  • libiscsi RHEL 8 1.18.0-8.module+el8.1.0+4066+0f1aadab

red hat advisories RHSA-2019:3345RHSA-2019:2308RHBA-2019:3723

  • ntfs-3g_ntfsprogs SLE Workstation Extension 15 SP3, SLE Workstation Extension 15 SP2 2021.8.22-3.8.1
  • ntfs-3g_ntfsprogs SLE Workstation Extension 12 SP5, SLE Software Development Kit 12 SP5 2021.8.22-5.9.1
  • ntfs-3g_ntfsprogs SLE Workstation Extension 15 2016.2.22-3.3.2
  • ntfs-3g_ntfsprogs SLED 12 SP4, SLED 12 SP3, SLE Workstation Extension 12 SP4 +3 more 2013.1.13-5.6.1

suse advisories SUSE-SU-2021:2971-1SUSE-SU-2021:2965-1SUSE-SU-2019:1001-1SUSE-SU-2019:1000-1

  • ntfs-3g_ntfsprogs openSUSE Leap 15.2 2021.8.22-lp152.5.3.1
  • ntfs-3g_ntfsprogs openSUSE Leap 15.3 2021.8.22-3.8.1
  • ntfs-3g_ntfsprogs openSUSE Leap 15.0 2016.2.22-lp150.2.3.1

opensuse advisories openSUSE-SU-2021:1244-1openSUSE-SU-2021:2971-1openSUSE-SU-2019:1314-1

  • netcf AlmaLinux 8 0.2.8-12.module_el8.5.0+2608+72063365
  • netcf AlmaLinux 8 0.2.8-12.module_el8.6.0+2880+7d9e3703
  • netcf AlmaLinux 8 0.2.8-12.module_el8.3.0+2048+e7a0a3ea
  • sgabios AlmaLinux 8 1:0.20170427git-3.module_el8.5.0+2608+72063365
  • sgabios AlmaLinux 8 1:0.20170427git-3.module_el8.3.0+2048+e7a0a3ea
  • libiscsi AlmaLinux 8 1.18.0-8.module_el8.6.0+2880+7d9e3703
  • libiscsi AlmaLinux 8 1.18.0-8.module_el8.5.0+2608+72063365
  • libiscsi AlmaLinux 8 1.18.0-8.module_el8.3.0+2048+e7a0a3ea

almalinux advisories ALSA-2019:3345

  • netcf Rocky Linux 8 0.2.8-12.module+el8.7.0+1084+97b81f61
  • netcf Rocky Linux 8 0.2.8-12.module+el8.4.0+534+4680a14e
  • netcf Rocky Linux 8 0.2.8-12.module+el8.6.0+847+b490afdd
  • sgabios Rocky Linux 8 1:0.20170427git-3.module+el8.7.0+1084+97b81f61
  • sgabios Rocky Linux 8 1:0.20170427git-3.module+el8.4.0+534+4680a14e
  • sgabios Rocky Linux 8 1:0.20170427git-3.module+el8.6.0+847+b490afdd
  • libiscsi Rocky Linux 8 1.18.0-8.module+el8.7.0+1084+97b81f61
  • libiscsi Rocky Linux 8 1.18.0-8.module+el8.4.0+534+4680a14e

rocky linux advisories RLSA-2019:3345

  • ntfs-3g Alpine 3.24, Alpine 3.23, Alpine 3.22 +14 more 2017.3.23-r2

alpine advisories ALPINE-CVE-2019-9755

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

  • ntfs-3g CBL-Mariner 2.0 2017.3.23-15

azure linux advisories AZL-6747AZL-7293

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

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-2019-9755 updated cvss 3.3

ntfs-3g: heap-based buffer overflow leads to local root privilege escalation

  • Red Hat Enterprise Linux 6 libguestfs-winsupport
    affected: no fix planned “Will not fix”
  • Red Hat Enterprise Linux 8 Advanced Virtualization libguestfs-winsupport
    affected: no fix available
  • Red Hat Advanced Virtualization CodeReady Builder for RHEL 8.1.0 hivex 1.3.15-7.module+el8.1.0+3554+1a3a94a6, netcf 0.2.8-12.module+el8.1.0+3921+a49f7d7b, libvirt 5.6.0-6.module+el8.1.0+4244+9aa4e6bb, seabios 1.12.0-5.module+el8.1.0+4022+29a53beb, libiscsi 1.18.0-8.module+el8.1.0+3554+1a3a94a6, libvirt-nss 5.6.0-6.module+el8.1.0+4244+9aa4e6bb, +41 more Red Hat Advanced Virtualization for RHEL 8.1.0 hivex 1.3.15-7.module+el8.1.0+3554+1a3a94a6, netcf 0.2.8-12.module+el8.1.0+3921+a49f7d7b, libvirt 5.6.0-6.module+el8.1.0+4244+9aa4e6bb, nbdkit 1.12.5-1.module+el8.1.0+3868+35f94834, seabios 1.12.0-5.module+el8.1.0+4022+29a53beb, libiscsi 1.18.0-8.module+el8.1.0+3554+1a3a94a6, +92 more
    fixed: vendor fix RHBA-2019:3723
  • Red Hat CodeReady Linux Builder (v. 8) hivex 1.3.15-7.module+el8.1.0+4066+0f1aadab, netcf 0.2.8-12.module+el8.1.0+4066+0f1aadab, libvirt 4.5.0-35.module+el8.1.0+4227+b2722cb3, seabios 1.11.1-4.module+el8.1.0+4066+0f1aadab, libiscsi 1.18.0-8.module+el8.1.0+4066+0f1aadab, netcf-libs 0.2.8-12.module+el8.1.0+4066+0f1aadab, +34 more Red Hat Enterprise Linux AppStream (v. 8) hivex 1.3.15-7.module+el8.1.0+4066+0f1aadab, nbdkit 1.4.2-5.module+el8.1.0+4066+0f1aadab, netcf 0.2.8-12.module+el8.1.0+4066+0f1aadab, libvirt 4.5.0-35.module+el8.1.0+4227+b2722cb3, seabios 1.11.1-4.module+el8.1.0+4066+0f1aadab, libiscsi 1.18.0-8.module+el8.1.0+4066+0f1aadab, +81 more
    fixed: vendor fix RHSA-2019:3345
  • Red Hat Enterprise Linux Server (v. 7) libguestfs-winsupport 7.2-3.el7
    fixed: vendor fix RHSA-2019:2308

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

0.53% chance of exploitation in the next 30 days, higher than 45% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 4.4 AV:L/AC:M/Au:N/C:P/I:P/A:P

Classification

Weakness
  • CWE-191 Integer Underflow (Wrap or Wraparound)
  • CWE-787 Out-of-bounds Write

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.