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ID

VAR-201609-0243


CVE

CVE-2016-4745


TITLE

Apple OS X of Kerberos 5 PAM Module user account enumeration vulnerability

Trust: 0.8

sources: JVNDB: JVNDB-2016-004978

DESCRIPTION

The Kerberos 5 (aka krb5) PAM module in Apple OS X before 10.12 does not use constant-time operations for determining username validity, which makes it easier for remote attackers to enumerate user accounts via a timing side-channel attack. Apple Mac OS X is prone to multiple security vulnerabilities. Attackers can exploit these issues to execute arbitrary code, gain sensitive information, cause denial-of-service conditions, bypass security restrictions, and perform unauthorized actions. This may aid in other attacks. These issues are fixed in: Apple macOS 10.12. Kerberos 5 (aka krb5) PAM is one of the network authentication protocol components. The vulnerability stems from the fact that the program does not use constant-time operations to verify that the user name is valid. A remote attacker could exploit this vulnerability to enumerate user accounts

Trust: 2.07

sources: NVD: CVE-2016-4745 // JVNDB: JVNDB-2016-004978 // BID: 93055 // VULHUB: VHN-93564 // VULMON: CVE-2016-4745

AFFECTED PRODUCTS

vendor:applemodel:mac os xscope:eqversion:10.11.6

Trust: 1.4

vendor:applemodel:mac os xscope:lteversion:10.11.6

Trust: 1.0

vendor:applemodel:mac osscope:eqversion:x10.11.6

Trust: 0.3

vendor:applemodel:macosscope:neversion:10.12

Trust: 0.3

sources: BID: 93055 // JVNDB: JVNDB-2016-004978 // CNNVD: CNNVD-201609-446 // NVD: CVE-2016-4745

CVSS

SEVERITY

CVSSV2

CVSSV3

nvd@nist.gov: CVE-2016-4745
value: MEDIUM

Trust: 1.0

NVD: CVE-2016-4745
value: MEDIUM

Trust: 0.8

CNNVD: CNNVD-201609-446
value: MEDIUM

Trust: 0.6

VULHUB: VHN-93564
value: MEDIUM

Trust: 0.1

VULMON: CVE-2016-4745
value: MEDIUM

Trust: 0.1

nvd@nist.gov: CVE-2016-4745
severity: MEDIUM
baseScore: 5.0
vectorString: AV:N/AC:L/AU:N/C:P/I:N/A:N
accessVector: NETWORK
accessComplexity: LOW
authentication: NONE
confidentialityImpact: PARTIAL
integrityImpact: NONE
availabilityImpact: NONE
exploitabilityScore: 10.0
impactScore: 2.9
acInsufInfo: NONE
obtainAllPrivilege: NONE
obtainUserPrivilege: NONE
obtainOtherPrivilege: NONE
userInteractionRequired: NONE
version: 2.0

Trust: 1.9

VULHUB: VHN-93564
severity: MEDIUM
baseScore: 5.0
vectorString: AV:N/AC:L/AU:N/C:P/I:N/A:N
accessVector: NETWORK
accessComplexity: LOW
authentication: NONE
confidentialityImpact: PARTIAL
integrityImpact: NONE
availabilityImpact: NONE
exploitabilityScore: 10.0
impactScore: 2.9
acInsufInfo: NONE
obtainAllPrivilege: NONE
obtainUserPrivilege: NONE
obtainOtherPrivilege: NONE
userInteractionRequired: NONE
version: 2.0

Trust: 0.1

nvd@nist.gov: CVE-2016-4745
baseSeverity: MEDIUM
baseScore: 5.3
vectorString: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
attackVector: NETWORK
attackComplexity: LOW
privilegesRequired: NONE
userInteraction: NONE
scope: UNCHANGED
confidentialityImpact: LOW
integrityImpact: NONE
availabilityImpact: NONE
exploitabilityScore: 3.9
impactScore: 1.4
version: 3.0

Trust: 1.8

sources: VULHUB: VHN-93564 // VULMON: CVE-2016-4745 // JVNDB: JVNDB-2016-004978 // CNNVD: CNNVD-201609-446 // NVD: CVE-2016-4745

PROBLEMTYPE DATA

problemtype:CWE-200

Trust: 1.9

sources: VULHUB: VHN-93564 // JVNDB: JVNDB-2016-004978 // NVD: CVE-2016-4745

THREAT TYPE

remote

Trust: 0.6

sources: CNNVD: CNNVD-201609-446

TYPE

information disclosure

Trust: 0.6

sources: CNNVD: CNNVD-201609-446

CONFIGURATIONS

sources:
            
            
            JVNDB: JVNDB-2016-004978

PATCH
title:Apple security updatesurl:https://support.apple.com/en-us/HT201222
Trust: 0.8
title:APPLE-SA-2016-09-20 macOS Sierra 10.12url:http://lists.apple.com/archives/security-announce/2016/Sep/msg00006.html
Trust: 0.8
title:HT207170url:https://support.apple.com/en-us/HT207170
Trust: 0.8
title:HT207170url:https://support.apple.com/ja-jp/HT207170
Trust: 0.8
title:Apple OS X Kerberos 5 PAM Repair measures for module security vulnerabilitiesurl:http://www.cnnvd.org.cn/web/xxk/bdxqById.tag?id=64303
Trust: 0.6
title:Apple: macOS Sierra 10.12url:https://vulmon.com/vendoradvisory?qidtp=apple_security_advisories&qid=56fe8957a503c1b7b6f00fbd6d759042
Trust: 0.1
sources:
            
            
            VULMON: CVE-2016-4745 // 
            
            
            
            JVNDB: JVNDB-2016-004978 // 
            
            
            
            CNNVD: CNNVD-201609-446

EXTERNAL IDS
db:NVDid:CVE-2016-4745
Trust: 2.9
db:BIDid:93055
Trust: 2.1
db:SECTRACKid:1036858
Trust: 1.2
db:JVNid:JVNVU90950877
Trust: 0.8
db:JVNDBid:JVNDB-2016-004978
Trust: 0.8
db:CNNVDid:CNNVD-201609-446
Trust: 0.7
db:ZDIid:ZDI-16-608
Trust: 0.3
db:ZDIid:ZDI-16-609
Trust: 0.3
db:VULHUBid:VHN-93564
Trust: 0.1
db:VULMONid:CVE-2016-4745
Trust: 0.1
sources:
            
            
            VULHUB: VHN-93564 // 
            
            
            
            VULMON: CVE-2016-4745 // 
            
            
            
            BID: 93055 // 
            
            
            
            JVNDB: JVNDB-2016-004978 // 
            
            
            
            CNNVD: CNNVD-201609-446 // 
            
            
            
            NVD: CVE-2016-4745

REFERENCES
url:http://www.securityfocus.com/bid/93055
Trust: 1.9
url:http://lists.apple.com/archives/security-announce/2016/sep/msg00006.html
Trust: 1.8
url:https://support.apple.com/ht207170
Trust: 1.8
url:http://www.securitytracker.com/id/1036858
Trust: 1.2
url:http://cve.mitre.org/cgi-bin/cvename.cgi?name=cve-2016-4745
Trust: 0.8
url:http://jvn.jp/vu/jvnvu90950877/index.html
Trust: 0.8
url:http://web.nvd.nist.gov/view/vuln/detail?vulnid=cve-2016-4745
Trust: 0.8
url:https://www.apple.com/
Trust: 0.3
url:http://www.apple.com/macosx/
Trust: 0.3
url:http://prod.lists.apple.com/archives/security-announce/2016/sep/msg00006.html
Trust: 0.3
url:http://www.zerodayinitiative.com/advisories/zdi-16-608/
Trust: 0.3
url:http://www.zerodayinitiative.com/advisories/zdi-16-609/
Trust: 0.3
url:https://cwe.mitre.org/data/definitions/200.html
Trust: 0.1
url:https://nvd.nist.gov
Trust: 0.1
url:https://www.rapid7.com/db/vulnerabilities/apple-osx-appleefiruntime-cve-2016-4696
Trust: 0.1
url:https://support.apple.com/kb/ht207170
Trust: 0.1
sources:
            
            
            VULHUB: VHN-93564 // 
            
            
            
            VULMON: CVE-2016-4745 // 
            
            
            
            BID: 93055 // 
            
            
            
            JVNDB: JVNDB-2016-004978 // 
            
            
            
            CNNVD: CNNVD-201609-446 // 
            
            
            
            NVD: CVE-2016-4745

CREDITS
Qidan He(@flanker_hqd) from KeenLab working with Trend Micro's Zero Day Initiative, Shrek_wzw of Qihoo 360 Nirvan Team, Jack Tang (@jacktang310) and Moony Li of Trend Micro working with Trend Micro's Zero Day Initiative, Meder Kydyraliev Google Security T
Trust: 0.6
sources:
            
            
            CNNVD: CNNVD-201609-446

SOURCES
db:VULHUBid:VHN-93564
db:VULMONid:CVE-2016-4745
db:BIDid:93055
db:JVNDBid:JVNDB-2016-004978
db:CNNVDid:CNNVD-201609-446
db:NVDid:CVE-2016-4745

LAST UPDATE DATE
2025-04-13T19:41:45.283000+00:00

SOURCES UPDATE DATE
db:VULHUBid:VHN-93564date:2017-07-30T00:00:00
db:VULMONid:CVE-2016-4745date:2017-07-30T00:00:00
db:BIDid:93055date:2016-11-24T01:11:00
db:JVNDBid:JVNDB-2016-004978date:2016-09-30T00:00:00
db:CNNVDid:CNNVD-201609-446date:2016-09-26T00:00:00
db:NVDid:CVE-2016-4745date:2025-04-12T10:46:40.837

SOURCES RELEASE DATE
db:VULHUBid:VHN-93564date:2016-09-25T00:00:00
db:VULMONid:CVE-2016-4745date:2016-09-25T00:00:00
db:BIDid:93055date:2016-09-20T00:00:00
db:JVNDBid:JVNDB-2016-004978date:2016-09-30T00:00:00
db:CNNVDid:CNNVD-201609-446date:2016-09-26T00:00:00
db:NVDid:CVE-2016-4745date:2016-09-25T10:59:44.987