MIT Kerberos 5 1.6 kadmin ldap injection

CVSS Meta Temp Score
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CTI Interest Score
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4.9$0-$5k0.00

Summaryinfo

A vulnerability classified as critical has been found in MIT Kerberos 5 1.6. This affects an unknown part of the component kadmin. This manipulation causes ldap injection. This vulnerability is tracked as CVE-2018-5730. The attack is possible to be carried out remotely. No exploit exists. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in MIT Kerberos 5 1.6 (Network Authentication Software). It has been declared as critical. Affected by this vulnerability is some unknown processing of the component kadmin. The manipulation with an unknown input leads to a ldap injection vulnerability. The CWE definition for the vulnerability is CWE-90. The product constructs all or part of an LDAP query using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended LDAP query when it is sent to a downstream component. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

MIT krb5 1.6 or later allows an authenticated kadmin with permission to add principals to an LDAP Kerberos database to circumvent a DN containership check by supplying both a "linkdn" and "containerdn" database argument, or by supplying a DN string which is a left extension of a container DN string but is not hierarchically within the container DN.

The bug was discovered 03/02/2018. The weakness was disclosed 03/06/2018 (Website). It is possible to read the advisory at lists.fedoraproject.org. This vulnerability is known as CVE-2018-5730 since 01/16/2018. The exploitation appears to be easy. The attack can be launched remotely. Required for exploitation is a single authentication. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1505 according to MITRE ATT&CK.

The vulnerability scanner Nessus provides a plugin with the ID 106908 (Fedora 27 : krb5 (2018-391a1f3e61)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Fedora Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 237015 (Red Hat Update for krb5 (RHSA-2018:3071)).

Upgrading eliminates this vulnerability. A possible mitigation has been published before and not just after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (106908). The entry VDB-114126 is pretty similar. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.1
VulDB Meta Temp Score: 4.9

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 3.8
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Ldap injection
CWE: CWE-90 / CWE-74 / CWE-707
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 106908
Nessus Name: Fedora 27 : krb5 (2018-391a1f3e61)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 10659
OpenVAS Name: Fedora Update for krb5 FEDORA-2018-391a1f3e61
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Patch: github.com

Timelineinfo

01/16/2018 🔍
02/20/2018 +35 days 🔍
02/21/2018 +1 days 🔍
03/02/2018 +9 days 🔍
03/06/2018 +4 days 🔍
03/06/2018 +0 days 🔍
03/07/2018 +1 days 🔍
05/05/2025 +2616 days 🔍

Sourcesinfo

Vendor: mit.edu

Advisory: RHSA-2018:3071
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2018-5730 (🔍)
GCVE (CVE): GCVE-0-2018-5730
GCVE (VulDB): GCVE-100-114127
SecurityTracker: 1042071

See also: 🔍

Entryinfo

Created: 03/07/2018 07:51
Updated: 05/05/2025 18:08
Changes: 03/07/2018 07:51 (71), 01/10/2020 19:49 (3), 02/17/2023 08:07 (5), 05/05/2025 18:08 (15)
Complete: 🔍
Cache ID: 216::103

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