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Vulnerability · Published Nov 27, 2023 · Assigned by redhat

CVE-2023-5871Libnbd: malicious nbd server may crash libnbd

Medium 5.3

In plain English

A medium-severity security flaw in Red Hat Enterprise Linux 6 from Red Hat. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.1% (higher than 66% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)5.3Medium
Exploit odds (30 days)1.1%top 34.0% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

Official description

A flaw was found in libnbd, due to a malicious Network Block Device (NBD), a protocol for accessing Block Devices such as hard disks over a Network. This issue may allow a malicious NBD server to cause a Denial of Service.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:9libnbd1.18.1-3.el9ALSA-2024:2204
AlmaLinux:9libnbd-bash-completion1.18.1-3.el9ALSA-2024:2204
AlmaLinux:9libnbd-devel1.18.1-3.el9ALSA-2024:2204
AlmaLinux:9nbdfuse1.18.1-3.el9ALSA-2024:2204
AlmaLinux:9ocaml-libnbd1.18.1-3.el9ALSA-2024:2204
AlmaLinux:9ocaml-libnbd-devel1.18.1-3.el9ALSA-2024:2204
AlmaLinux:9python3-libnbd1.18.1-3.el9ALSA-2024:2204
Debian:13libnbd1.18.1-1DEBIAN-CVE-2023-5871
Debian:14libnbd1.18.1-1DEBIAN-CVE-2023-5871
Ubuntu:22.04:LTSlibnbdno fix listedUBUNTU-CVE-2023-5871
Ubuntu:24.04:LTSlibnbdno fix listedUBUNTU-CVE-2023-5871

Affected products (as reported)

VendorProductVersions
Red Hat Red Hat Enterprise Linux 9 see references
Red Hat Red Hat Enterprise Linux 6 see references
Red Hat Red Hat Enterprise Linux 7 see references
Red Hat Red Hat Enterprise Linux 8 see references

Weakness: CWE-617 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

References