CVE-2023-5871

Libnbd: malicious nbd server may crash libnbd

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.

Remediation

Workaround:

  • Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.

Category

5.3
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.04%
Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com
Affected: Red Hat Red Hat Enterprise Linux 9
Affected: Red Hat Red Hat Enterprise Linux 6
Affected: Red Hat Red Hat Enterprise Linux 7
Affected: Red Hat Red Hat Enterprise Linux 8
Published at:
Updated at:

References

Link Tags
https://access.redhat.com/errata/RHSA-2024:2204 vendor advisory
https://access.redhat.com/security/cve/CVE-2023-5871 vdb entry vendor advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2247308 vendor advisory issue tracking
https://lists.libguestfs.org/archives/list/guestfs@lists.libguestfs.org/thread/PFVUCMPFQUDC23JXSCUUPXIGDZ7XCFMD/ patch mailing list

Frequently Asked Questions

What is the severity of CVE-2023-5871?
CVE-2023-5871 has been scored as a medium severity vulnerability.
How to fix CVE-2023-5871?
As a workaround for remediating CVE-2023-5871: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
Is CVE-2023-5871 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2023-5871 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-5871?
CVE-2023-5871 affects Red Hat Red Hat Enterprise Linux 9, Red Hat Red Hat Enterprise Linux 6, Red Hat Red Hat Enterprise Linux 7, Red Hat Red Hat Enterprise Linux 8.
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