Libnbd: crash or misbehaviour when nbd server returns an unexpected block size
CVE-2023-5215

5.3MEDIUM

Key Information:

Vendor
Red Hat
Status
Red Hat Enterprise Linux 9
Red Hat Enterprise Linux 8
Red Hat Enterprise Linux 8 Advanced Virtualization
Vendor
CVE Published:
28 September 2023

Summary

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.

Affected Version(s)

Red Hat Enterprise Linux 9 0:1.18.1-3.el9

References

https://access.redhat.com/errata/RHSA-2024:2204
vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2023-5215
vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2241041
issue-trackingx_refsource_REDHAT

CVSS V3.1

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Adjacent Network
Attack Complexity:
High
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.