Affected product: Files or Directories Accessible to External Parties
Unknown · Unknown
5.5MediumCVSS 3.1
Recommended action
Patch only the product branches with a verified fix
Medium technical severity with public exploit material referenced by a structured source; prioritise exposed affected systems while verifying vendor guidance. Verified remediation exists for at least one product or source, but 1 structured product or package state remain unresolved. Apply remediation only to the exact product branch confirmed by its source.
Published severityMedium→Operational priority:Medium, unchanged from published severity.unchanged
Evidence used
No CISA KEV confirmation is currently recorded.
A structured source references public exploit or proof-of-concept material.
Exploitation requires an existing local or physical foothold with privileges.
EPSS is 0.49% for the current model date.
Compensating controls
Validate the affected product branch and deploy the verified fixed release.
Restrict local access and enforce least privilege on affected hosts.
Increase monitoring for the attack path and post-exploitation behaviour described in the report.
Verification
Confirm that the asset runs Unknown Unknown and falls inside the recorded affected range.
Verify the installed build against the product-specific fixed version after deployment.
Validate exposure, authentication requirements and compensating controls in the actual environment.
Reopen this reassessment when CVSS, KEV, EPSS, exploit evidence or remediation changes.
Cross-source reconciliation
Remediation availability differs by product scope
Verified remediation exists for at least one product or source, but 1 structured product or package state remain unresolved. Apply remediation only to the exact product branch confirmed by its source.
Canonical Ubuntu Security: 1 affected package state with no published fix
Distribution package intelligence
Release-specific package status
Debian, ubuntu findings are scoped to the named distribution, release and source package. An absent finding does not mean a package is unaffected.
5 package states
Package result overrides the generic status
BlackTree has verified remediation for at least one product or source, but the relevant distribution still reports no fixed package for 1 affected package state shown here. Treat those rows as affected with no fix until that distribution publishes a fixed version.
Repository candidate not checked
A published vendor fix does not prove that a matching update is enabled and installable on a particular asset. Confirm the local package candidate before scheduling remediation.
Distribution release
Source package
Vendor state
Fixed version
Evidence
Debian trixietrixie · source
linux
Vendor fix publishedDebian records a fixed source-package version for this release.
Affected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.
National CERT insights ?CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.
Choose official national sources for this report. Each advisory shows its original language. Your selection is remembered on this device and included in shared links.
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-2015-1489
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 actionPatch only the product branches with a verified fix
Medium technical severity with public exploit material referenced by a structured source; prioritise exposed affected systems while verifying vendor guidance. Verified remediation exists for at least one product or source, but 1 structured product or package state remain unresolved. Apply remediation only to the exact product branch confirmed by its source.
Fix availability varies by product
01
What, why and how
The VFS subsystem in the Linux kernel 3.x provides an incomplete set of requirements for setattr operations that underspecifies removing extended privilege attributes, which allows local users to cause a denial of service (capability stripping) via a failed invocation of a system call, as demonstrated by using chown to remove a capability from the ping or Wireshark dumpcap program.
What
The VFS subsystem in the Linux kernel 3.x provides an incomplete set of requirements for setattr operations that underspecifies removing extended privilege attributes, which allows local users to cause a denial of service (capability stripping) via a failed invocation of a system call, as demonstrated by using chown to remove a capability from the ping or Wireshark dumpcap program.
Why
A file or directory that should be restricted can be reached by an external party because its access controls or placement are unsafe.
How
An attacker operating through local access may attempt exploitation with low privileges. If successful, the issue may disrupt the affected service.
What
The VFS subsystem in the Linux kernel 3.x provides an incomplete set of requirements for setattr operations that underspecifies removing extended privilege attributes, which allows local users to cause a denial of service (capability stripping) via a failed invocation of a system call, as demonstrated by using chown to remove a capability from the ping or Wireshark dumpcap program.
Why
A file or directory that should be restricted can be reached by an external party because its access controls or placement are unsafe.
How
An attacker operating through local access may attempt exploitation with low privileges. If successful, the issue may disrupt the affected service.
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.Reference recorded
A structured CVE source labels at least one public reference as exploit material. BlackTree has not independently validated that it is safe, reliable or weaponised.
Likely attack path
local access → Files or Directories Accessible to External Parties → disrupt the affected service
Attack surface
Local
Privileges required
Low: a basic authenticated account is required
User interaction
None
Attack complexity
Low: no specialised conditions are recorded
Security boundary
Unchanged: impact remains within the vulnerable component's security authority
Weakness ?CWE means Common Weakness Enumeration: a standard category for the underlying weakness.
CWE-552: Files or Directories Accessible to External Parties. The product makes files or directories accessible to unauthorized actors, even though they should not be.
CVSS vector ?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Common Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.
AVLocalAttack vector: The attacker needs local access to the vulnerable system.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.PRLowPrivileges required: The attacker needs basic user-level privileges.UINoneUser interaction: No action by another user is required.SUnchangedScope: The security impact remains within the vulnerable component's authority.CNoneConfidentiality impact: No direct loss is represented by this metric.INoneIntegrity impact: No direct loss is represented by this metric.AHighAvailability impact: A successful attack can cause a major loss.
Post-exploitation / living off the land
The issue can support a local privilege or sandbox boundary transition; normal system utilities may then be available in the gained context.
Denial of serviceCWE-552Public exploit reference
A
Official authority intelligence
Only matched European and national findings are included. Language selectors and unavailable sources are omitted.
ENISA EUVD · EUVD-2015-1489Official EUVD mapping
0 linked advisory records.
Official EUVD record ↗CERT-FR · French · CERTFR-2021-AVI-265Multiples vulnérabilités dans le noyau Linux d'Ubuntu
n).
Documentation
Bulletin de sécurité Ubuntu USN-4904-1 du 13 avril 2021
https://ubuntu.com/security/notices/USN-4904-1
Bulletin de sécurité Ubuntu USN-4907-1 du 13 avril 2021
https://ubuntu.com/security/notices/USN-4907-1
Bulletin de sécurité Ubuntu USN-4909-1 du 13 avril 2021
https://ubuntu.com/security/notices/USN-4909-1
Bulletin de sécurité Ubuntu USN-4910-1 du 13 avril 2021
https://ubuntu.com/security/notices/USN-4910-1
Bulletin de sécurité Ubuntu USN-4911-1 du 13 avril 2021
https://ubuntu.com/security/notices/USN-4911-1
Bulletin de sécurité Ubuntu USN-4912-1 du 13 avril 2021
https://ubuntu.com/security/notices/USN-4912-1
Référence CVE CVE-2015-1350
https://www.cve.org/CVERecord?id=CVE-2015-1350
Référence CVE CVE-2017-16644
https://www.cve.org/CVERecord?id=CVE-2017-16644
Référence CVE CVE-2017-5967
https://www.cve.org/CVERecord?id=CVE-2017-5967
Référence CVE CVE-2018-13095
https://www.cve.org/CVERecord?id=CVE-2018-13095
Référence CVE CVE-2019-16231
https://www.cve.org/CVERecord?id=CVE-2019-16231
Référence CVE CVE-2019-16232
https://www.cve.org/CVERecord?id=CVE-2019-16232
Référence CVE CVE-2019-19061
https://www.cve.org/CVERecord?id=CVE-2019-19061
Référence CVE CVE-2020-0423
https://www.cve.org/CVERecord?id=CVE-2020-0423
Référence CVE CVE-2020-0465
https://www.cve.org/CVERecord?id=CVE-20
Official advisory ↗CERT-FR · French · CERTFR-2017-AVI-162Multiples vulnérabilités dans le noyau Linux de SUSE
prise Server 12-SP1
SUSE Linux Enterprise Software Development Kit 12-SP1
SUSE Linux Enterprise Workstation Extension 12-SP1
Résumé
De multiples vulnérabilités ont été corrigées dans le noyau Linux de SUSE . Certaines d'entre elles
permettent à un attaquant de provoquer une exécution de code arbitraire
à distance, un déni de service à distance et un déni de service.
Solution
Se référer au bulletin de sécurité de l'éditeur pour l'obtention des
correctifs (cf. section Documentation).
Documentation
Bulletin de sécurité SUSE SUSE-SU-2017:1360-1 du 19 mai 2017
https://www.suse.com/support/update/announcement/2017/suse-su-20171360-1/
Référence CVE CVE-2015-1350
https://www.cve.org/CVERecord?id=CVE-2015-1350
Référence CVE CVE-2016-1004
https://www.cve.org/CVERecord?id=CVE-2016-1004
Référence CVE CVE-2016-1020
https://www.cve.org/CVERecord?id=CVE-2016-1020
Référence CVE CVE-2016-2117
https://www.cve.org/CVERecord?id=CVE-2016-2117
Référence CVE CVE-2016-3070
https://www.cve.org/CVERecord?id=CVE-2016-3070
Référence CVE CVE-2016-5243
https://www.cve.org/CVERecord?id=CVE-2016-5243
Référence CVE CVE-2016-7117
https://www.cve.org/CVERecord?id=CVE-2016-7117
Référence CVE CVE-2016-9191
https://www.cve.org/CVERecord?id=CVE-2016-9191
Référence CVE CVE-2016-9588
https://www.cve.org/CVERecord?id=CVE-2016-9588
Ré
Official advisory ↗CERT-FR · French · CERTFR-2017-AVI-131Multiples vulnérabilités dans le noyau Linux de SUSE
lles
permettent à un attaquant de provoquer une exécution de code arbitraire
à distance, un déni de service à distance et un déni de service.
Solution
Se référer au bulletin de sécurité de l'éditeur pour l'obtention des
correctifs (cf. section Documentation).
Documentation
Bulletin de sécurité SUSE SUSE-SU-2017:1102-1 du 25 avril 2017
https://www.suse.com/support/update/announcement/2017/suse-su-20171102-1/
Référence CVE CVE-2004-0230
https://www.cve.org/CVERecord?id=CVE-2004-0230
Référence CVE CVE-2012-6704
https://www.cve.org/CVERecord?id=CVE-2012-6704
Référence CVE CVE-2013-6368
https://www.cve.org/CVERecord?id=CVE-2013-6368
Référence CVE CVE-2015-1350
https://www.cve.org/CVERecord?id=CVE-2015-1350
Référence CVE CVE-2015-8956
https://www.cve.org/CVERecord?id=CVE-2015-8956
Référence CVE CVE-2015-8962
https://www.cve.org/CVERecord?id=CVE-2015-8962
Référence CVE CVE-2015-8964
https://www.cve.org/CVERecord?id=CVE-2015-8964
Référence CVE CVE-2016-1008
https://www.cve.org/CVERecord?id=CVE-2016-1008
Référence CVE CVE-2016-3841
https://www.cve.org/CVERecord?id=CVE-2016-3841
Référence CVE CVE-2016-5696
https://www.cve.org/CVERecord?id=CVE-2016-5696
Référence CVE CVE-2016-7042
https://www.cve.org/CVERecord?id=CVE-2016-7042
Référence CVE CVE-2016-7097
https://www.cve.org/CVERecord?id=CVE-2016-7097
Ré
Official advisory ↗CERT-FR · French · CERTFR-2017-AVI-054Multiples vulnérabilités dans le noyau Linux de Suse
ées dans le noyau Linux de Suse . Certaines d'entre elles
permettent à un attaquant de provoquer un problème de sécurité non
spécifié par l'éditeur, une exécution de code arbitraire à distance et
une exécution de code arbitraire.
Solution
Se référer au bulletin de sécurité de l'éditeur pour l'obtention des
correctifs (cf. section Documentation).
Documentation
Bulletin de sécurité Suse du 17 février 2017
https://www.suse.com//support/update/announcement/2017/suse-su-20170494-1.html
Référence CVE CVE-2004-0230
https://www.cve.org/CVERecord?id=CVE-2004-0230
Référence CVE CVE-2012-6704
https://www.cve.org/CVERecord?id=CVE-2012-6704
Référence CVE CVE-2015-1350
https://www.cve.org/CVERecord?id=CVE-2015-1350
Référence CVE CVE-2015-8956
https://www.cve.org/CVERecord?id=CVE-2015-8956
Référence CVE CVE-2015-8962
https://www.cve.org/CVERecord?id=CVE-2015-8962
Référence CVE CVE-2015-8964
https://www.cve.org/CVERecord?id=CVE-2015-8964
Référence CVE CVE-2015-8970
https://www.cve.org/CVERecord?id=CVE-2015-8970
Référence CVE CVE-2016-0823
https://www.cve.org/CVERecord?id=CVE-2016-0823
Référence CVE CVE-2016-1008
https://www.cve.org/CVERecord?id=CVE-2016-1008
Référence CVE CVE-2016-3841
https://www.cve.org/CVERecord?id=CVE-2016-3841
Référence CVE CVE-2016-6828
https://www.cve.org/CVERecord?id=CVE-2016-6828
Ré
Official advisory ↗CERT-FR · French · CERTFR-2017-AVI-044Multiples vulnérabilités dans le noyau Linux de Suse
uant de provoquer une exécution de code arbitraire
à distance, un déni de service à distance et une atteinte à l'intégrité
des données.
Solution
Se référer au bulletin de sécurité de l'éditeur pour l'obtention des
correctifs (cf. section Documentation).
Documentation
Bulletin de sécurité Suse suse-su-20170437-1 du 09 février 2017
https://www.suse.com//support/update/announcement/2017/suse-su-20170437-1.html
Référence CVE CVE-2004-0230
https://www.cve.org/CVERecord?id=CVE-2004-0230
Référence CVE CVE-2012-6704
https://www.cve.org/CVERecord?id=CVE-2012-6704
Référence CVE CVE-2013-6368
https://www.cve.org/CVERecord?id=CVE-2013-6368
Référence CVE CVE-2015-1350
https://www.cve.org/CVERecord?id=CVE-2015-1350
Référence CVE CVE-2015-8962
https://www.cve.org/CVERecord?id=CVE-2015-8962
Référence CVE CVE-2015-8964
https://www.cve.org/CVERecord?id=CVE-2015-8964
Référence CVE CVE-2016-1008
https://www.cve.org/CVERecord?id=CVE-2016-1008
Référence CVE CVE-2016-5696
https://www.cve.org/CVERecord?id=CVE-2016-5696
Référence CVE CVE-2016-7910
https://www.cve.org/CVERecord?id=CVE-2016-7910
Référence CVE CVE-2016-7911
https://www.cve.org/CVERecord?id=CVE-2016-7911
Référence CVE CVE-2016-7916
https://www.cve.org/CVERecord?id=CVE-2016-7916
Référence CVE CVE-2016-8399
https://www.cve.org/CVERecord?id=CVE-2016-8399
Ré
Official advisory ↗CERT-FR · French · CERTFR-2017-AVI-034Multiples vulnérabilités dans le noyau Linux de SUSE
USE SSUSE-SU-2017:0303-1 du 27 janvier 2017
https://www.suse.com//support/update/announcement/2017/suse-su-20170303-1.html
Bulletin de sécurité SUSE SUSE-SU-2017:0307-1 du 27 janvier 2017
https://www.suse.com//support/update/announcement/2017/suse-su-20170307-1.html
Bulletin de sécurité SUSE SUSE-SU-2017:0333-1 du 30 janvier 2017
https://www.suse.com//support/update/announcement/2017/suse-su-20170333-1.html
Référence CVE CVE-2004-0230
https://www.cve.org/CVERecord?id=CVE-2004-0230
Référence CVE CVE-2012-6704
https://www.cve.org/CVERecord?id=CVE-2012-6704
Référence CVE CVE-2013-4312
https://www.cve.org/CVERecord?id=CVE-2013-4312
Référence CVE CVE-2015-1350
https://www.cve.org/CVERecord?id=CVE-2015-1350
Référence CVE CVE-2015-7513
https://www.cve.org/CVERecord?id=CVE-2015-7513
Référence CVE CVE-2015-7833
https://www.cve.org/CVERecord?id=CVE-2015-7833
Référence CVE CVE-2015-8956
https://www.cve.org/CVERecord?id=CVE-2015-8956
Référence CVE CVE-2015-8962
https://www.cve.org/CVERecord?id=CVE-2015-8962
Référence CVE CVE-2015-8964
https://www.cve.org/CVERecord?id=CVE-2015-8964
Référence CVE CVE-2016-0823
https://www.cve.org/CVERecord?id=CVE-2016-0823
Référence CVE CVE-2016-1008
https://www.cve.org/CVERecord?id=CVE-2016-1008
Référence CVE CVE-2016-1583
https://www.cve.org/CVERecord?id=CVE-2016-1583
Ré
Official advisory ↗CERT-FR · French · CERTFR-2017-AVI-016Multiples vulnérabilités dans le noyau Linux de SUSE
De multiples vulnérabilités ont été corrigées dans le noyau Linux de SUSE . Elles permettent à un
attaquant de provoquer un déni de service, une atteinte à la
confidentialité des données et une élévation de privilèges.
Official advisory ↗JVN iPedia · Japanese · JVNDB-2015-007123Linux Kernel の VFS サブシステムにおけるサービス運用妨害 (DoS) の脆弱性
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.
Use the product-specific evidence above. Patch only products with a verified fixed release, and keep every affected or under-investigation state without a matching fix in the remediation queue.
Workaround
No verified workaround is recorded. Limit untrusted access and use least privilege until authoritative guidance is available.
04
Evidence and provenance
Published 2 May 2016 · Last source change 6 Aug 2024, 04:40 UTC · CWE-552 · Files or Directories Accessible to External Parties
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-2015-1489
Product sourceUnavailable
Remediation sourceCVE/CNA references
CWE sourceNIST NVD
NVD statusNVD modified after enrichment
Missing structured fields: affected product. Missing data is not evidence of low risk; review the primary advisory.
Affected versionsThe structured affected or fixed version information changed.
Before
n/a · Fixed: No fixed version is explicitly recorded in the structured CVE data.
After
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.
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.