CVE-2014-4344

krb5: NULL pointer dereference flaw in SPNEGO acceptor for continuation tokens

Severity Score

7.8

*CVSS v2

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

The acc_ctx_cont function in the SPNEGO acceptor in lib/gssapi/spnego/spnego_mech.c in MIT Kerberos 5 (aka krb5) 1.5.x through 1.12.x before 1.12.2 allows remote attackers to cause a denial of service (NULL pointer dereference and application crash) via an empty continuation token at a certain point during a SPNEGO negotiation.

La función acc_ctx_cont en el aceptador SPNEGO en lib/gssapi/spnego/spnego_mech.c en MIT Kerberos 5 (también conocido como krb5) 1.5.x hasta 1.12.x anterior a 1.12.2 permite a atacantes remotos causar una denegación de servicio (referencia a puntero nulo y caída de la aplicación) a través de un token de continuación vacío en cierto momento durante una negociación SPNEGO.

A NULL pointer dereference flaw was found in the MIT Kerberos SPNEGO acceptor for continuation tokens. A remote, unauthenticated attacker could use this flaw to crash a GSSAPI-enabled server application.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

None

Availability

Complete

Attack Vector

Network

Attack Complexity

Medium

Authentication

None

Confidentiality

None

Integrity

None

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2014-06-20 CVE Reserved
2014-08-11 CVE Published
2024-06-26 EPSS Updated
2024-08-06 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-476: NULL Pointer Dereference

CAPEC

References (20)

URL	Tag	Source
http://advisories.mageia.org/MGASA-2014-0345.html	X_refsource_confirm
http://aix.software.ibm.com/aix/efixes/security/nas_advisory1.asc	X_refsource_confirm
http://krbdev.mit.edu/rt/Ticket/Display.html?id=7970	Issue Tracking
http://secunia.com/advisories/59102	Third Party Advisory
http://secunia.com/advisories/60082	Third Party Advisory
http://secunia.com/advisories/60448	Third Party Advisory
http://secunia.com/advisories/61051	Third Party Advisory
http://support.f5.com/kb/en-us/solutions/public/15000/500/sol15561.html	X_refsource_confirm
http://www.osvdb.org/109389	Vdb Entry
http://www.securityfocus.com/bid/69160	Vdb Entry
http://www.securitytracker.com/id/1030706	Vdb Entry
https://exchange.xforce.ibmcloud.com/vulnerabilities/95210	Vdb Entry
https://github.com/krb5/krb5/commit/524688ce87a15fc75f87efc8c039ba4c7d5c197b	X_refsource_confirm

URL	Date	SRC

URL	Date	SRC
https://github.com/krb5/krb5/commit/a7886f0ed1277c69142b14a2c6629175a6331edc	2020-01-21

URL	Date	SRC
http://lists.fedoraproject.org/pipermail/package-announce/2014-August/136360.html	2020-01-21
http://rhn.redhat.com/errata/RHSA-2015-0439.html	2020-01-21
http://www.debian.org/security/2014/dsa-3000	2020-01-21
http://www.mandriva.com/security/advisories?name=MDVSA-2014:165	2020-01-21
https://bugzilla.redhat.com/show_bug.cgi?id=1121877	2015-03-05
https://access.redhat.com/security/cve/CVE-2014-4344	2015-03-05

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				7.0 Search vendor "Debian" for product "Debian Linux" and version "7.0"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Desktop Search vendor "Redhat" for product "Enterprise Linux Desktop"				7.0 Search vendor "Redhat" for product "Enterprise Linux Desktop" and version "7.0"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Hpc Node Search vendor "Redhat" for product "Enterprise Linux Hpc Node"				7.0 Search vendor "Redhat" for product "Enterprise Linux Hpc Node" and version "7.0"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Server Search vendor "Redhat" for product "Enterprise Linux Server"				7.0 Search vendor "Redhat" for product "Enterprise Linux Server" and version "7.0"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Workstation Search vendor "Redhat" for product "Enterprise Linux Workstation"				7.0 Search vendor "Redhat" for product "Enterprise Linux Workstation" and version "7.0"		-		Affected
Mit Search vendor "Mit"		Kerberos 5 Search vendor "Mit" for product "Kerberos 5"				1.10 Search vendor "Mit" for product "Kerberos 5" and version "1.10"		-		Affected
Mit Search vendor "Mit"		Kerberos 5 Search vendor "Mit" for product "Kerberos 5"				1.10.1 Search vendor "Mit" for product "Kerberos 5" and version "1.10.1"		-		Affected
Mit Search vendor "Mit"		Kerberos 5 Search vendor "Mit" for product "Kerberos 5"				1.10.2 Search vendor "Mit" for product "Kerberos 5" and version "1.10.2"		-		Affected
Mit Search vendor "Mit"		Kerberos 5 Search vendor "Mit" for product "Kerberos 5"				1.10.3 Search vendor "Mit" for product "Kerberos 5" and version "1.10.3"		-		Affected
Mit Search vendor "Mit"		Kerberos 5 Search vendor "Mit" for product "Kerberos 5"				1.10.4 Search vendor "Mit" for product "Kerberos 5" and version "1.10.4"		-		Affected
Mit Search vendor "Mit"		Kerberos 5 Search vendor "Mit" for product "Kerberos 5"				1.11 Search vendor "Mit" for product "Kerberos 5" and version "1.11"		-		Affected
Mit Search vendor "Mit"		Kerberos 5 Search vendor "Mit" for product "Kerberos 5"				1.11.1 Search vendor "Mit" for product "Kerberos 5" and version "1.11.1"		-		Affected
Mit Search vendor "Mit"		Kerberos 5 Search vendor "Mit" for product "Kerberos 5"				1.11.2 Search vendor "Mit" for product "Kerberos 5" and version "1.11.2"		-		Affected
Mit Search vendor "Mit"		Kerberos 5 Search vendor "Mit" for product "Kerberos 5"				1.11.3 Search vendor "Mit" for product "Kerberos 5" and version "1.11.3"		-		Affected
Mit Search vendor "Mit"		Kerberos 5 Search vendor "Mit" for product "Kerberos 5"				1.11.4 Search vendor "Mit" for product "Kerberos 5" and version "1.11.4"		-		Affected
Mit Search vendor "Mit"		Kerberos 5 Search vendor "Mit" for product "Kerberos 5"				1.11.5 Search vendor "Mit" for product "Kerberos 5" and version "1.11.5"		-		Affected
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