What is the CVSS score of CVE-2023-36054?

CVE-2023-36054 has a CVSS 3.1 base score of 6.5 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H. EPSS exploitation probability: 2.8%.

Is there a patch available for CVE-2023-36054?

Yes, a patch is available for CVE-2023-36054. Update the affected software to the latest version immediately.

Kerberos 5 CVE-2023-36054

MEDIUM

Access of Uninitialized Pointer (CWE-824)

2023-08-07 cve@mitre.org

Denial Of Service Memory Corruption Debian Active Iq Unified Manager Debian Linux Ontap Tools Clustered Data Ontap Kerberos 5 Hci Management Services For Element Software Netapp Mit

6.5

CVSS 3.1 · NVD

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Vulnerability Assessment

Weakness	CWE CWE-824 ASVS 5.0 V15 - Secure Coding and Architecture Uninitialized pointer prevention MITRE ATT&CK 1 technique across 1 tactic: Execution The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. Sign in to read
Impact	CVSS score of 6.5 (MEDIUM). Attack characteristics: network attack vector, low complexity, low privileges required, no user interaction not required.
Exploit ScenarioDerived	This vulnerability can be exploited remotely over the network. Successful exploitation could compromise the medium-severity affected system.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).

Patch available 2.8% exploitation probability (EPSS)

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AnalysisAI

lib/kadm5/kadm_rpc_xdr.c in MIT Kerberos 5 (aka krb5) before 1.20.2 and 1.21.x before 1.21.1 frees an uninitialized pointer. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, low attack complexity.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

This vulnerability is classified under CWE-824. lib/kadm5/kadm_rpc_xdr.c in MIT Kerberos 5 (aka krb5) before 1.20.2 and 1.21.x before 1.21.1 frees an uninitialized pointer. A remote authenticated user can trigger a kadmind crash. This occurs because _xdr_kadm5_principal_ent_rec does not validate the relationship between n_key_data and the key_data array count. Affected products include: Mit Kerberos 5, Debian Debian Linux, Netapp Active Iq Unified Manager, Netapp Clustered Data Ontap, Netapp Hci. Version information: before 1.20.2.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 6.5 MEDIUM

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

DescriptionNVD

lib/kadm5/kadm_rpc_xdr.c in MIT Kerberos 5 (aka krb5) before 1.20.2 and 1.21.x before 1.21.1 frees an uninitialized pointer. A remote authenticated user can trigger a kadmind crash. This occurs because _xdr_kadm5_principal_ent_rec does not validate the relationship between n_key_data and the key_data array count.

Threat Intelligence Overview

EPSS Score

2.8%

Top 15% exploitable

Data Quality

3 sources

Confidence: Low

NVD

CVE.org

EPSS

GitHub

VulDB

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity MEDIUM

CISA KEV No

Public POC No

EPSS 2.8%

Patch available Yes

Active threat No

Deciding rule

MEDIUM severity (CVSS 4.0-6.9)

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived

Scheduled

Exploitation· derived

None

System Exposure· derived

Open

Automatable· derived

Human Impact· derived

Medium

Priority Score

Low Medium High Critical

KEV: 0

EPSS: +3

CVSS: +32

PoC: 0

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Memory Corruption HIGH

Memory corruption occurs when a program writes data beyond the boundaries of allocated memory regions or accesses memory in unintended ways, violating the integrity of the process's address space.

Denial of Service MEDIUM

Denial of Service attacks render applications or systems unavailable by overwhelming resources or triggering failure conditions.

Affected Products (CPE)NVD

cpe:2.3:a:mit:kerberos_5:*:*:*:*:*:*:*:*

cpe:2.3:a:mit:kerberos_5:1.21:-:*:*:*:*:*:*

cpe:2.3:a:mit:kerberos_5:1.21:beta1:*:*:*:*:*:*

cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*

cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:vmware_vsphere:*:*

cpe:2.3:a:netapp:clustered_data_ontap:9.0:-:*:*:*:*:*:*

cpe:2.3:a:netapp:hci:-:*:*:*:*:*:*:*

cpe:2.3:a:netapp:management_services_for_element_software:-:*:*:*:*:*:*:*

cpe:2.3:a:netapp:ontap_tools:-:*:*:*:*:vmware_vsphere:*:*

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References

Advisories & patches

PATCH https://github.com/krb5/krb5/commit/ef08b09c9459551aabbe7924fb176f1583053cdd PATCH https://github.com/krb5/krb5/compare/krb5-1.20.1-final...krb5-1.20.2-final PATCH https://github.com/krb5/krb5/compare/krb5-1.21-final...krb5-1.21.1-final ADVISORY https://vuldb.com/vuln/236313 REF https://lists.debian.org/debian-lts-announce/2023/10/msg00031.html REF https://security.netapp.com/advisory/ntap-20230908-0004/ REF https://web.mit.edu/kerberos/www/advisories/

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