Vulnerability CVE-2018-5709

Vulnerability Name:

CVE-2018-5709 (CCN-137648)

Assigned:

2018-01-15

Published:

2018-01-15

Updated:

2021-02-25

Summary:

An issue was discovered in MIT Kerberos 5 (aka krb5) through 1.16. There is a variable "dbentry->n_key_data" in kadmin/dbutil/dump.c that can store 16-bit data but unknowingly the developer has assigned a "u4" variable to it, which is for 32-bit data. An attacker can use this vulnerability to affect other artifacts of the database as we know that a Kerberos database dump file contains trusted data.

CVSS v3 Severity:

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

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

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

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

CVSS v2 Severity:

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

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

7.5 High (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P)

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

Vulnerability Type:

CWE-190

Vulnerability Consequences:

Gain Access

References:

Source: MITRE
Type: CNA
CVE-2018-5709

Source: XF
Type: UNKNOWN
krb5-cve20185709-integer-overflow(137648)

Source: CCN
Type: poojamnit GIT Repository
Kerberos-V5-1.16-Vulnerabilities/Integer Overflow

Source: MISC
Type: Third Party Advisory
https://github.com/poojamnit/Kerberos-V5-1.16-Vulnerabilities/tree/master/Integer%20Overflow

Source: MLIST
Type: UNKNOWN
[mina-dev] 20210225 [jira] [Created] (FTPSERVER-500) Security vulnerability in common/lib/log4j-1.2.17.jar

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

Vulnerable Configuration:

Configuration 1:

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

Denotes that component is vulnerable

Oval Definitions

Definition ID	Class	Title	Last Modified
oval:com.ubuntu.xenial:def:201857090000000	V	CVE-2018-5709 on Ubuntu 16.04 LTS (xenial) - negligible.	2018-01-16
oval:com.ubuntu.artful:def:20185709000	V	CVE-2018-5709 on Ubuntu 17.10 (artful) - medium.	2018-01-16
oval:com.ubuntu.xenial:def:20185709000	V	CVE-2018-5709 on Ubuntu 16.04 LTS (xenial) - negligible.	2018-01-16
oval:com.ubuntu.disco:def:201857090000000	V	CVE-2018-5709 on Ubuntu 19.04 (disco) - negligible.	2018-01-16
oval:com.ubuntu.bionic:def:20185709000	V	CVE-2018-5709 on Ubuntu 18.04 LTS (bionic) - negligible.	2018-01-16
oval:com.ubuntu.cosmic:def:201857090000000	V	CVE-2018-5709 on Ubuntu 18.10 (cosmic) - negligible.	2018-01-16
oval:com.ubuntu.cosmic:def:20185709000	V	CVE-2018-5709 on Ubuntu 18.10 (cosmic) - negligible.	2018-01-16
oval:com.ubuntu.bionic:def:201857090000000	V	CVE-2018-5709 on Ubuntu 18.04 LTS (bionic) - negligible.	2018-01-16
oval:com.ubuntu.trusty:def:20185709000	V	CVE-2018-5709 on Ubuntu 14.04 LTS (trusty) - negligible.	2018-01-16

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