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Fencer Vulns
high 7.4

CVE-2024-7383 json

Libnbd: nbd server improper certificate validation

published 2024-08-05 2 y ago modified 2026-11-05 3 d ago also EUVD-2024-48319

cvss
7.4
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 33%
public exploits
0
none known

Summary

A flaw was found in libnbd. The client did not always correctly verify the NBD server's certificate when using TLS to connect to an NBD server. This issue allows a man-in-the-middle attack on NBD traffic.

Patch / fix

  • Red Hat Red Hat Enterprise Linux 8 8100020240905091210.489197e6
  • Red Hat Red Hat Enterprise Linux 9 0:1.18.1-4.el9_4
  • libnbd Debian 14, Debian 13 1.20.2-1

debian advisories DEBIAN-CVE-2024-7383

  • SLOF RHEL 8 20210217-2.module+el8.10.0+20141+6faa2812
  • hivex RHEL 8 1.3.18-23.module+el8.9.0+18724+20190c23
  • netcf RHEL 8 0.2.8-12.module+el8.9.0+18724+20190c23
  • swtpm RHEL 8 0.7.0-4.20211109gitb79fd91.module+el8.9.0+18724+20190c23
  • libnbd RHEL 8 1.6.0-6.module+el8.10.0+22250+3c790083
  • nbdkit RHEL 8 1.24.0-5.module+el8.9.0+18724+20190c23
  • libtpms RHEL 8 0.9.1-2.20211126git1ff6fe1f43.module+el8.9.0+18724+20190c23
  • libvirt RHEL 8 8.0.0-23.2.module+el8.10.0+21972+d7867348

red hat advisories RHSA-2024:6964RHSA-2024:6757

  • libnbd SLE Module for Server Applications 15 SP6, openSUSE Leap 15.6 1.18.5-150600.18.3.1
  • libnbd openSUSE Leap 15.5 1.18.5-150300.8.21.1

suse advisories SUSE-SU-2024:2813-1SUSE-SU-2024:2789-1

  • libnbd openSUSE Tumbleweed 1.20.2-1.1

opensuse advisories openSUSE-SU-2024:14240-1

  • SLOF AlmaLinux 8 20210217-2.module_el8.10.0+3768+dfd76e10
  • hivex AlmaLinux 8 1.3.18-23.module_el8.6.0+2880+7d9e3703
  • hivex AlmaLinux 8 1.3.18-23.module_el8.6.0+3161+a07c0ea5
  • netcf AlmaLinux 8 0.2.8-12.module_el8.6.0+2880+7d9e3703
  • netcf AlmaLinux 8 0.2.8-12.module_el8.6.0+3161+a07c0ea5
  • swtpm AlmaLinux 8 0.7.0-4.20211109gitb79fd91.module_el8.7.0+3346+68867adb
  • libnbd AlmaLinux 8 1.6.0-6.module_el8.10.0+3897+eb84924d
  • nbdkit AlmaLinux 8 1.24.0-5.module_el8.8.0+3485+7cffc4a3

almalinux advisories ALSA-2024:6964ALSA-2024:6757

  • hivex Rocky Linux 8 1.3.18-23.module+el8.10.0+1590+a67ab969
  • hivex Rocky Linux 8 1.3.18-23.module+el8.10.0+1835+43f01cbb
  • netcf Rocky Linux 8 0.2.8-12.module+el8.10.0+1590+a67ab969
  • netcf Rocky Linux 8 0.2.8-12.module+el8.10.0+1835+43f01cbb
  • swtpm Rocky Linux 8 0.7.0-4.20211109gitb79fd91.module+el8.10.0+1590+a67ab969
  • swtpm Rocky Linux 8 0.7.0-4.20211109gitb79fd91.module+el8.10.0+1835+43f01cbb
  • libnbd Rocky Linux 8 1.6.0-6.module+el8.10.0+1870+0a714c9f
  • nbdkit Rocky Linux 8 1.24.0-5.module+el8.10.0+1590+a67ab969

rocky linux advisories RLSA-2024:6964RLSA-2024:6757

  • libnbd CBL-Mariner 2.0 1.12.1-4
  • libnbd Azure Linux 3.0 1.18.3-3

azure linux advisories AZL-47428AZL-47436

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-2024-7383 updated cvss 7.4

libnbd: NBD server improper certificate validation

  • Red Hat Enterprise Linux 8 Advanced Virtualization libnbd, nbdfuse, ocaml-libnbd, python3-libnbd, libnbd-bash-completion
    affected: no fix planned “Will not fix”
  • Red Hat Enterprise Linux 10 libnbd
    affected: no fix available
  • Red Hat Enterprise Linux AppStream (v. 8) netcf 0.2.8-12.module+el8.9.0+18724+20190c23, hivex 1.3.18-23.module+el8.9.0+18724+20190c23, libnbd 1.6.0-6.module+el8.10.0+22250+3c790083, nbdkit 1.24.0-5.module+el8.9.0+18724+20190c23, nbdfuse 1.6.0-6.module+el8.10.0+22250+3c790083, seabios 1.16.0-4.module+el8.9.0+19570+14a90618, +104 more
    fixed: vendor fix RHSA-2024:6964
  • Red Hat Enterprise Linux AppStream (v. 9) libnbd 1.18.1-4.el9_4, nbdfuse 1.18.1-4.el9_4, python3-libnbd 1.18.1-4.el9_4, libnbd-bash-completion 1.18.1-4.el9_4
    fixed: vendor fix RHSA-2024:6757
  • Red Hat Enterprise Linux CRB (v. 8) netcf 0.2.8-12.module+el8.9.0+18724+20190c23, hivex 1.3.18-23.module+el8.9.0+18724+20190c23, libnbd 1.6.0-6.module+el8.10.0+22250+3c790083, nbdfuse 1.6.0-6.module+el8.10.0+22250+3c790083, seabios 1.16.0-4.module+el8.9.0+19570+14a90618, SLOF 20210217-2.module+el8.10.0+20141+6faa2812, +38 more
    fixed: vendor fix RHSA-2024:6964
  • Red Hat Enterprise Linux CRB (v. 9) ocaml-libnbd 1.18.1-4.el9_4
    fixed: vendor fix RHSA-2024:6757

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

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
2 y ago

Exploit prediction

0.39% chance of exploitation in the next 30 days, higher than 33% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.4 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

Affected products

  • Red Hat Red Hat Enterprise Linux 8
  • Red Hat Red Hat Enterprise Linux 9
  • Red Hat Red Hat Enterprise Linux 10
  • Red Hat Red Hat Enterprise Linux 8 Advanced Virtualization

Classification

Weakness
  • CWE-295 Improper Certificate Validation

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.