CVE-2023-5215

Public Exploit
Libnbd: crash or misbehaviour when nbd server returns an unexpected block size

Description

A flaw was found in libnbd. A server can reply with a block size larger than 2^63 (the NBD spec states the size is a 64-bit unsigned value). This issue could lead to an application crash or other unintended behavior for NBD clients that doesn't treat the return value of the nbd_get_size() function correctly.

Categories

5.3
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.05%
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 8
Affected: Red Hat Red Hat Enterprise Linux 8 Advanced Virtualization
Affected: Red Hat Red Hat Enterprise Linux 8 Advanced Virtualization
Published at:
Updated at:

References

Link Tags
https://access.redhat.com/errata/RHSA-2024:2204 vendor advisory
https://access.redhat.com/security/cve/CVE-2023-5215 vdb entry vendor advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2241041 vendor advisory issue tracking
https://listman.redhat.com/archives/libguestfs/2023-September/032635.html patch exploit

Frequently Asked Questions

What is the severity of CVE-2023-5215?
CVE-2023-5215 has been scored as a medium severity vulnerability.
How to fix CVE-2023-5215?
To fix CVE-2023-5215, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2023-5215 being actively exploited in the wild?
It is possible that CVE-2023-5215 is being exploited or will be exploited in a near future based on public information. 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-2023-5215?
CVE-2023-5215 affects Red Hat Red Hat Enterprise Linux 9, Red Hat Red Hat Enterprise Linux 8, Red Hat Red Hat Enterprise Linux 8 Advanced Virtualization, Red Hat Red Hat Enterprise Linux 8 Advanced Virtualization.
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