CVE-2015-8630

krb5: krb5 doesn't check for null policy when KADM5_POLICY is set in the mask

Severity Score

7.5

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

The (1) kadm5_create_principal_3 and (2) kadm5_modify_principal functions in lib/kadm5/srv/svr_principal.c in kadmind in MIT Kerberos 5 (aka krb5) 1.12.x and 1.13.x before 1.13.4 and 1.14.x before 1.14.1 allow remote authenticated users to cause a denial of service (NULL pointer dereference and daemon crash) by specifying KADM5_POLICY with a NULL policy name.

Las funciones (1) kadm5_create_principal_3 y (2) kadm5_modify_principal en lib/kadm5/srv/svr_principal.c en kadmind en MIT Kerberos 5 (también conocido como krb5) 1.12.x y 1.13.x en versiones anteriores a 1.13.4 y 1.14.x en versiones anteriores a 1.14.1 permiten a usuarios remotos autenticados causar una denegación de servicio (referencia a puntero NULL y caída de demonio) mediante la especificación KADM5_POLICY con un nombre de política NULL.

A NULL pointer dereference flaw was found in the procedure used by the MIT Kerberos kadmind service to store policies: the kadm5_create_principal_3() and kadm5_modify_principal() function did not ensure that a policy was given when KADM5_POLICY was set. An authenticated attacker with permissions to modify the database could use this flaw to add or modify a principal with a policy set to NULL, causing the kadmind service to crash.

*Credits: N/A

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

None

Availability

Partial

Attack Vector

Network

Attack Complexity

High

Authentication

Single

Confidentiality

None

Integrity

None

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2015-12-23 CVE Reserved
2016-02-05 CVE Published
2023-05-15 EPSS Updated
2024-08-06 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-476: NULL Pointer Dereference

CAPEC

References (10)

URL	Tag	Source
http://krbdev.mit.edu/rt/Ticket/Display.html?id=8342	X_refsource_confirm
http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html	X_refsource_confirm
http://www.securitytracker.com/id/1034915	Vdb Entry

URL	Date	SRC

URL	Date	SRC
https://github.com/krb5/krb5/commit/b863de7fbf080b15e347a736fdda0a82d42f4f6b	2020-01-21

URL	Date	SRC
http://lists.opensuse.org/opensuse-updates/2016-02/msg00059.html	2020-01-21
http://lists.opensuse.org/opensuse-updates/2016-02/msg00110.html	2020-01-21
http://rhn.redhat.com/errata/RHSA-2016-0532.html	2020-01-21
http://www.debian.org/security/2016/dsa-3466	2020-01-21
https://access.redhat.com/security/cve/CVE-2015-8630	2016-03-31
https://bugzilla.redhat.com/show_bug.cgi?id=1302632	2016-03-31

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Mit Search vendor "Mit"		Kerberos 5 Search vendor "Mit" for product "Kerberos 5"				1.12 Search vendor "Mit" for product "Kerberos 5" and version "1.12"		-		Affected
Mit Search vendor "Mit"		Kerberos 5 Search vendor "Mit" for product "Kerberos 5"				1.12.1 Search vendor "Mit" for product "Kerberos 5" and version "1.12.1"		-		Affected
Mit Search vendor "Mit"		Kerberos 5 Search vendor "Mit" for product "Kerberos 5"				1.12.2 Search vendor "Mit" for product "Kerberos 5" and version "1.12.2"		-		Affected
Mit Search vendor "Mit"		Kerberos 5 Search vendor "Mit" for product "Kerberos 5"				1.12.3 Search vendor "Mit" for product "Kerberos 5" and version "1.12.3"		-		Affected
Mit Search vendor "Mit"		Kerberos 5 Search vendor "Mit" for product "Kerberos 5"				1.12.4 Search vendor "Mit" for product "Kerberos 5" and version "1.12.4"		-		Affected
Mit Search vendor "Mit"		Kerberos 5 Search vendor "Mit" for product "Kerberos 5"				1.12.5 Search vendor "Mit" for product "Kerberos 5" and version "1.12.5"		-		Affected
Mit Search vendor "Mit"		Kerberos 5 Search vendor "Mit" for product "Kerberos 5"				1.13 Search vendor "Mit" for product "Kerberos 5" and version "1.13"		-		Affected
Mit Search vendor "Mit"		Kerberos 5 Search vendor "Mit" for product "Kerberos 5"				1.13.1 Search vendor "Mit" for product "Kerberos 5" and version "1.13.1"		-		Affected
Mit Search vendor "Mit"		Kerberos 5 Search vendor "Mit" for product "Kerberos 5"				1.13.2 Search vendor "Mit" for product "Kerberos 5" and version "1.13.2"		-		Affected
Mit Search vendor "Mit"		Kerberos 5 Search vendor "Mit" for product "Kerberos 5"				1.13.3 Search vendor "Mit" for product "Kerberos 5" and version "1.13.3"		-		Affected
Mit Search vendor "Mit"		Kerberos 5 Search vendor "Mit" for product "Kerberos 5"				1.14 Search vendor "Mit" for product "Kerberos 5" and version "1.14"		-		Affected
Mit Search vendor "Mit"		Kerberos 5 Search vendor "Mit" for product "Kerberos 5"				1.14 Search vendor "Mit" for product "Kerberos 5" and version "1.14"		alpha1		Affected
Mit Search vendor "Mit"		Kerberos 5 Search vendor "Mit" for product "Kerberos 5"				1.14 Search vendor "Mit" for product "Kerberos 5" and version "1.14"		beta1		Affected
Mit Search vendor "Mit"		Kerberos 5 Search vendor "Mit" for product "Kerberos 5"				1.14 Search vendor "Mit" for product "Kerberos 5" and version "1.14"		beta2		Affected