BlackTreeCVE Intelligence
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Full vulnerability report · 2015
CVE-2015-6095High confidence

n/a: security vulnerability

n/a · n/a

4.9MediumCVSS 2.0
Recommended action
Scheduled

Medium technical severity with no CISA KEV confirmation; remediate through the normal risk-based patch cycle unless local exposure raises the priority.

Patch available
Optional official sources

National CERT insights
?CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.

Select the national-authority views to include. The exact source language is shown on each matched advisory. Your choice is remembered on this device and encoded in the shareable URL.

Official European source

ENISA European Vulnerability Database

Official EUVD identifiers, advisory evidence and known-exploited context. Missing fields are not treated as evidence of low risk.

1 current
ENISA EUVD identifier

EUVD-2015-6038

No EUVD known-exploited evidence

ENISA has published the identifier mapping but no EUVD description has been stored yet.

EUVD state
Present in the current official mapping
Known exploitation
Not present in the current ENISA EUVD known-exploited dataset. This is not proof of no exploitation.
ENISA score
Not supplied in the stored EUVD record
Advisory evidence
No linked advisory details stored yet
Recommended actionScheduled

Medium technical severity with no CISA KEV confirmation; remediate through the normal risk-based patch cycle unless local exposure raises the priority.

Patch available
01

What, why and how

Kerberos in Microsoft Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8, Windows 8.1, Windows Server 2012 Gold and R2, Windows RT Gold and 8.1, and Windows 10 Gold and 1511 mishandles password changes, which allows physically proximate attackers to bypass authentication, and conduct decryption attacks against certain BitLocker configurations, by connecting to an unintended Key Distribution Center (KDC), aka "Windows Kerberos Security Feature Bypass."

What

Kerberos in Microsoft Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8, Windows 8.1, Windows Server 2012 Gold and R2, Windows RT Gold and 8.1, and Windows 10 Gold and 1511 mishandles password changes, which allows physically proximate attackers to bypass authentication, and conduct decryption attacks against certain BitLocker configurations, by connecting to an unintended Key Distribution Center (KDC), aka "Windows Kerberos Security Feature Bypass."

Why

The current structured CVE record identifies a security weakness, but the root cause requires confirmation in the linked vendor material.

How

An attacker operating through the affected interface may attempt exploitation when the stated preconditions are met. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

What

Kerberos in Microsoft Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8, Windows 8.1, Windows Server 2012 Gold and R2, Windows RT Gold and 8.1, and Windows 10 Gold and 1511 mishandles password changes, which allows physically proximate attackers to bypass authentication, and conduct decryption attacks against certain BitLocker configurations, by connecting to an unintended Key Distribution Center (KDC), aka "Windows Kerberos Security Feature Bypass."

Why

The current structured CVE record identifies a security weakness, but the root cause requires confirmation in the linked vendor material.

How

An attacker operating through the affected interface may attempt exploitation when the stated preconditions are met. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

02

Exploit reality and attack path

CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.

Observed exploitation
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
No confirmed evidence

No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.

Public PoC / exploit material
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
None recorded

No exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.

Likely attack path
the affected interface → vulnerable operation → cause the confidentiality, integrity or availability impact described by the vendor
Attack surface
Unspecified
Privileges required
None: unauthenticated exploitation is possible
User interaction
Not stated in the selected CVSS metric
Attack complexity
Low: no specialised conditions are recorded
Security boundary
Not stated in the selected CVSS metric
Weakness
?CWE means Common Weakness Enumeration: a standard category for the underlying weakness.
CWE-255 ↗

CWE-255. Open the MITRE definition for the exact weakness description.

CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
AV:L/AC:L/Au:N/C:N/I:C/A:N
Post-exploitation / living off the land
No specific living-off-the-land technique is confirmed in the structured sources. Monitor normal administration tools for activity inconsistent with the affected service's baseline.
UnauthenticatedCWE-255
A

Official authority intelligence

Only matched European and national findings are included. Language selectors and unavailable sources are omitted.

CERT-FR · French · CERTFR-2015-AVI-479Vulnérabilité dans Microsoft Windows

Une vulnérabilité a été corrigée dans Microsoft Windows . Elle permet à un attaquant de provoquer un contournement de la politique de sécurité.

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2015-005875複数の Microsoft Windows 製品の Kerberos における認証を回避される脆弱性

複数の Microsoft Windows 製品の Kerberos は、パスワードの変更を誤って処理するため、認証を回避され、特定の BitLocker 設定に対する暗号解読攻撃を実行される脆弱性が存在します。 マイクロソフトセキュリティ情報には、この脆弱性は「Windows Kerberos のセキュリティ機能のバイパス」と記載されています。

Official advisory ↗
KISA KrCERT/CC · Korean · KNVD-4570MS 11월 보안위협에 따른 정기 보안 업데이트 권고

스푸핑을 해결하기 위한 Schannel에 대한 보안 업데이트 ##### □ 영향 o 공격자가 영향 받는 시스템의 메시지를 가로채기 ##### □ 설명 o 공격자가 클라이언트와 합법적인 서버 간에 MiTM(메시지 가로채기) 공격을 수행하는 경우 이 취약성으로 인해 스 푸핑이 허용될 수 있는 취약점이존재 o 관련취약점 : - Schannel TLS 트리플 핸드셰이크 취약점 - (CVE-2015-6112) o 영향 : 스푸핑 o 중요도 : 중요 ##### □ 해당시스템 o 참조사이트 참고 - 한글 : https://technet.microsoft.com/ko-kr/library/security/MS15-121 - 영문 : https://technet.microsoft.com/en-us/library/security/MS15-121 ##### □ 해결책 o 해당 시스템에 대한 마이크로소프트사의 취약점 패치 적용 [MS15-122] 보안 기능 우회를 해결하기 위한 Kerberos에 대한 보안 업데이트 ##### □ 영향 o 공격자가 영향 받는 시스템의 정보를 공개 ##### □ 설명 o 액세스 권한을 가진 공격자는 악성 Kerberos KDC에 연결하여 Kerberos 인증을 우회 o 관련취약점 : - Windows Kerberos 보안 기능 우회 - (CVE-2015-6095) o 영향 : 보안 우회 o 중요도 : 중요 ##### □ 해당시스템 o 참조사이트 참고 - 한글 : https://technet.microsoft.com/ko-kr/library/security/MS15-122 - 영문 : https://technet.microsoft.com/en-us/library/security/MS15-122 ##### □ 해결책 o 해당 시스템에 대한 마이크로소프트사의 취약점 패치 적용 [MS15-123] 정보 유출을 해결하기 위한 비즈니스용 Skype 및 Microsoft Lync에 대한 보안 업데이트 ##### □ 영향 o 공격자가 영향 받는 시스템에 정보 유출 ##### □ 설명 o 공격자가 특수 제작된 JavaScript 콘텐츠가 포함된 메시지 사용자에게 전달하는 경우, 정보 유출문제가 발생할 수 있는 취약점 o 관련취약점 : - 서버 입력 유효성 검사 정보 유출 취약점 - (CVE-2015-6061) o 영향 : 정보 유출 o 중요도 : 중요 ##### □ 해당시스템 o 참조사이트 참고 - 한글 : https://technet.microsoft.com/ko-kr/library/security/MS15-123 - 영문 : https://technet.microsoft.com/en-us/library/securi

Official advisory ↗
03

Patch and workaround

Operational remediation based on structured source evidence.

Status
?Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change.
Patch available
Affected
n/a: n/a
Fixed
An authoritative update reference is available, but the fixed version is not recorded in the structured CVE fields. Check the linked vendor advisory for the applicable release.
Action
Review the linked authoritative reference and apply the recorded fixed release appropriate to the affected product branch.
Workaround
No verified workaround is recorded. Limit untrusted access and use least privilege until authoritative guidance is available.
04

Evidence and provenance

Published 11 Nov 2015 · Last source change 6 Aug 2024, 07:15 UTC · CWE-255

CVE recordCVE.org · 5.1
CVSS sourceNIST NVD
EPSS source
?The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.
FIRST · tracked since 2026-09-01
European sourceENISA EUVD · EUVD-2015-6038
Product sourceCNA
Remediation sourceCVE/CNA references
CWE sourceNIST NVD
NVD statusNVD modified after enrichment

Core structured fields are present and their contributing authorities are shown above.

Material change intelligence

What changed after publication

View recent updates ↗
  1. SeveritySeverity changed from Unknown to Medium.
    Before
    Unknown
    After
    Medium
    NIST NVD ↗
  2. CVSS scoreCVSS score changed from not recorded to 4.9 (CVSS 2.0 · NIST NVD · AV:L/AC:L/Au:N/C:N/I:C/A:N).
    Before
    not recorded
    After
    4.9 (CVSS 2.0 · NIST NVD · AV:L/AC:L/Au:N/C:N/I:C/A:N)
    NIST NVD ↗
  3. ENISA EUVD mappingEUVD-2015-6038 was added to the official ENISA EUVD mapping for this CVE.
    Before
    not recorded
    After
    {"euvdId":"EUVD-2015-6038"}
    ENISA EUVD ↗
  4. Catalogue recordCVE added to the BlackTree catalogue.
    CNA ↗
Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
CVE published
Fixed release or patch reference recorded
ENISA EUVD · EUVD-2015-6038↗CVE authority or vendor reference↗Official CVE record (CNA and ADP data)↗NVD record↗
Technical terms and abbreviations used in this report
CVE
Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
CVSS
Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
EPSS
Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
CWE
Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
CNA
CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
CISA ADP
Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
NVD
National Vulnerability Database: NIST's enrichment service for CVE records.
CERT / CSIRT
A computer security incident response team that publishes warnings or coordinates incident response.
PoC
Proof of concept: public material that demonstrates or helps reproduce exploitation.
CSAF
Common Security Advisory Framework: a machine-readable format for security advisories.
LoTL
Living off the land: abuse of legitimate tools or system functions during an attack.
Free version - for non-commercial use only.CVE-2015-6095 · cve.blacktree.nl