Vulnerability CVE-2018-5710

Vulnerability Name:

CVE-2018-5710 (CCN-137652)

Assigned:

2018-01-15

Published:

2018-01-15

Updated:

2018-08-13

Summary:

An issue was discovered in MIT Kerberos 5 (aka krb5) through 1.16. The pre-defined function "strlen" is getting a "NULL" string as a parameter value in plugins/kdb/ldap/libkdb_ldap/ldap_principal2.c in the Key Distribution Center (KDC), which allows remote authenticated users to cause a denial of service (NULL pointer dereference) via a modified kadmin client.

CVSS v3 Severity:

6.5 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
5.6 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:W/RC:R)

Exploitability Metrics:	Attack Vector (AV): Network Attack Complexity (AC): Low Privileges Required (PR): Low User Interaction (UI): None
Scope:	Scope (S): Unchanged
Impact Metrics:	Confidentiality (C): None Integrity (I): None Availibility (A): High

6.5 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
5.6 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:W/RC:R)

Exploitability Metrics:	Attack Vector (AV): Network Attack Complexity (AC): Low Privileges Required (PR): Low User Interaction (UI): None
Scope:	Scope (S): Unchanged
Impact Metrics:	Confidentiality (C): None Integrity (I): None Availibility (A): High

CVSS v2 Severity:

4.0 Medium (CVSS v2 Vector: AV:N/AC:L/Au:S/C:N/I:N/A:P)

Exploitability Metrics:	Access Vector (AV): Network Access Complexity (AC): Low Authentication (Au): Single_Instance
Impact Metrics:	Confidentiality (C): None Integrity (I): None Availibility (A): Partial

6.8 Medium (CCN CVSS v2 Vector: AV:N/AC:L/Au:S/C:N/I:N/A:C)

Exploitability Metrics:	Access Vector (AV): Network Access Complexity (AC): Low Athentication (Au): Single_Instance
Impact Metrics:	Confidentiality (C): None Integrity (I): None Availibility (A): Complete

Vulnerability Type:

CWE-476

Vulnerability Consequences:

Denial of Service

References:

Source: MITRE
Type: CNA
CVE-2018-5710

Source: XF
Type: UNKNOWN
krb5-cve20185710-dos(137652)

Source: CCN
Type: poojamnit GIT Repository
Kerberos-V5-1.16-Vulnerabilities/Denial Of Service(DoS)

Source: MISC
Type: UNKNOWN
https://github.com/poojamnit/Kerberos-V5-1.16-Vulnerabilities/tree/master/Denial%20Of%20Service(DoS)

Source: CCN
Type: MIT Web site
Kerberos: The Network Authentication Protocol

Vulnerable Configuration:

Configuration 1:

cpe:/a:mit:kerberos:*:*:*:*:*:*:*:* (Version <= 5-1.16)

Configuration CCN 1:

cpe:/a:mit:kerberos_5:1.16:*:*:*:*:*:*:*

Denotes that component is vulnerable

Oval Definitions

Definition ID	Class	Title	Last Modified
oval:com.ubuntu.xenial:def:201857100000000	V	CVE-2018-5710 on Ubuntu 16.04 LTS (xenial) - low.	2018-01-16
oval:com.ubuntu.artful:def:20185710000	V	CVE-2018-5710 on Ubuntu 17.10 (artful) - medium.	2018-01-16
oval:com.ubuntu.xenial:def:20185710000	V	CVE-2018-5710 on Ubuntu 16.04 LTS (xenial) - low.	2018-01-16
oval:com.ubuntu.disco:def:201857100000000	V	CVE-2018-5710 on Ubuntu 19.04 (disco) - low.	2018-01-16
oval:com.ubuntu.bionic:def:20185710000	V	CVE-2018-5710 on Ubuntu 18.04 LTS (bionic) - low.	2018-01-16
oval:com.ubuntu.cosmic:def:201857100000000	V	CVE-2018-5710 on Ubuntu 18.10 (cosmic) - low.	2018-01-16
oval:com.ubuntu.cosmic:def:20185710000	V	CVE-2018-5710 on Ubuntu 18.10 (cosmic) - low.	2018-01-16
oval:com.ubuntu.bionic:def:201857100000000	V	CVE-2018-5710 on Ubuntu 18.04 LTS (bionic) - low.	2018-01-16
oval:com.ubuntu.trusty:def:20185710000	V	CVE-2018-5710 on Ubuntu 14.04 LTS (trusty) - low.	2018-01-16

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