Is CVE-2023-5215 in the CISA KEV catalog?

No. CVE-2023-5215 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2023-5215?

CVE-2023-5215 has a CVSS v3 base score of 5.3 (MEDIUM).

What is the EPSS score for CVE-2023-5215?

CVE-2023-5215 has an EPSS score of 0.75% (50th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2023-5215?

Upgrade libnbd on debian 13 to 1.16.5-1 or later. Fixes are available for 25 affected products.

CVE & CISA-KEV Catalog

CVE-2023-5215

MEDIUM

5.3

CVSS v3

NVD

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.

CWE-241 CWE-252

How to fix

Remediation Available

libnbdDebian

Fixed in:1.16.5-1CVE-2023-5215

libnbdRed Hat / RHEL

Fixed in:0:1.18.1-3.el9RHSA-2024:2204

libnbdRocky

Fixed in:0:1.18.1-3.el9RHSA-2024:2204

libnbd-bash-completionRocky

Fixed in:0:1.18.1-3.el9RHSA-2024:2204

libnbd-bash-completionRed Hat / RHEL

Fixed in:0:1.18.1-3.el9RHSA-2024:2204

libnbd-debuginfoRocky

Fixed in:0:1.18.1-3.el9RHSA-2024:2204

libnbd-debuginfoRed Hat / RHEL

Fixed in:0:1.18.1-3.el9RHSA-2024:2204

libnbd-debugsourceRed Hat / RHEL

Fixed in:0:1.18.1-3.el9RHSA-2024:2204

libnbd-debugsourceRocky

Fixed in:0:1.18.1-3.el9RHSA-2024:2204

libnbd-develRocky

Fixed in:0:1.18.1-3.el9RHSA-2024:2204

libnbd-develRed Hat / RHEL

Fixed in:0:1.18.1-3.el9RHSA-2024:2204

nbdfuseRed Hat / RHEL

Fixed in:0:1.18.1-3.el9RHSA-2024:2204

nbdfuseRocky

Fixed in:0:1.18.1-3.el9RHSA-2024:2204

nbdfuse-debuginfoRed Hat / RHEL

Fixed in:0:1.18.1-3.el9RHSA-2024:2204

nbdfuse-debuginfoRocky

Fixed in:0:1.18.1-3.el9RHSA-2024:2204

ocaml-libnbdRocky

Fixed in:0:1.18.1-3.el9RHSA-2024:2204

ocaml-libnbdRed Hat / RHEL

Fixed in:0:1.18.1-3.el9RHSA-2024:2204

ocaml-libnbd-debuginfoRed Hat / RHEL

Fixed in:0:1.18.1-3.el9RHSA-2024:2204

ocaml-libnbd-debuginfoRocky

Fixed in:0:1.18.1-3.el9RHSA-2024:2204

ocaml-libnbd-develRocky

Fixed in:0:1.18.1-3.el9RHSA-2024:2204

ocaml-libnbd-develRed Hat / RHEL

Fixed in:0:1.18.1-3.el9RHSA-2024:2204

python3-libnbdRed Hat / RHEL

Fixed in:0:1.18.1-3.el9RHSA-2024:2204

python3-libnbdRocky

Fixed in:0:1.18.1-3.el9RHSA-2024:2204

python3-libnbd-debuginfoRocky

Fixed in:0:1.18.1-3.el9RHSA-2024:2204

python3-libnbd-debuginfoRed Hat / RHEL

Fixed in:0:1.18.1-3.el9RHSA-2024:2204

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorAdjacent

Attack ComplexityHigh

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploit Intelligence

0.75%probability of exploitation in 30 days

50thpercentile

Moderate risk: more likely to be exploited than 50% of all known CVEs.

References

Patch1

listman.redhat.com

Vendor Advisory2

Other references1

access.redhat.com

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.