BlackTreeCVE Intelligence
← Back to the CVE catalogue
Full vulnerability report · 2017
CVE-2017-13849High confidence

It allows remote attackers to cause a denial of service (application crash) via a crafted text file

Unknown · Unknown

5.5MediumCVSS 3.0
Recommended action
Within 7 days

Medium technical severity with public exploit material referenced by a structured source; prioritise exposed affected systems while verifying vendor guidance.

Fix not verified
R
Operational reassessment

Published severity in operational context

Open reassessment dashboard →
Published severityMediumOperational 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.
  • EPSS is 3.94% for the current model date.

Compensating controls

  • 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

  1. Confirm that the asset runs Unknown Unknown and falls inside the recorded affected range.
  2. Recheck the vendor advisory before scheduling a change because no verified fixed version is currently retained.
  3. Validate exposure, authentication requirements and compensating controls in the actual environment.
  4. Reopen this reassessment when CVSS, KEV, EPSS, exploit evidence or remediation changes.
Mitigation target: As exposure requiresRemediation target: Within 365 days

This automated reassessment organises public evidence. It does not know asset exposure, business impact or control effectiveness and does not replace CVSS or a human risk decision.

Optional official sources

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-2017-5364

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 actionWithin 7 days

Medium technical severity with public exploit material referenced by a structured source; prioritise exposed affected systems while verifying vendor guidance.

Fix not verified
01

What, why and how

An issue was discovered in certain Apple products. iOS before 11.1 is affected. tvOS before 11.1 is affected. watchOS before 4.1 is affected. The issue involves the "CoreText" component. It allows remote attackers to cause a denial of service (application crash) via a crafted text file.

What

An issue was discovered in certain Apple products. iOS before 11.1 is affected. tvOS before 11.1 is affected. watchOS before 4.1 is affected. The issue involves the "CoreText" component. It allows remote attackers to cause a denial of service (application crash) via a crafted text file.

Why

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

How

An attacker operating through local access may attempt exploitation without authentication after a user interaction. If successful, the issue may disrupt the affected service.

What

An issue was discovered in certain Apple products. iOS before 11.1 is affected. tvOS before 11.1 is affected. watchOS before 4.1 is affected. The issue involves the "CoreText" component. It allows remote attackers to cause a denial of service (application crash) via a crafted text file.

Why

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

How

An attacker operating through local access may attempt exploitation without authentication after a user interaction. 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 → Improper Input Validation → disrupt the affected service
Attack surface
Local
Privileges required
None: unauthenticated exploitation is possible
User interaction
Required interaction required
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-20 ↗

CWE-20: Improper Input Validation. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Common Vulnerability Scoring System 3.0: 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.PRNonePrivileges required: The attacker does not need an account or existing privileges.UIRequiredUser interaction: Another user must perform an action for exploitation to succeed.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.
UnauthenticatedDenial of serviceCWE-20Public exploit reference
A

Official authority intelligence

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

Canadian Centre for Cyber Security · English · AV17-167Apple security updates

Number: AV17-167 Date: 14 November 2017 Purpose The purpose of this advisory is to bring attention to multiple Apple system security updates for iOS. Assessment Apple has released the following support article: •             HT208255 - iOS 11.1.1 This update addresses multiple vulnerabilities on the system listed above. CVE Reference: CVE-2017-13849, CVE-2017-13799, CVE-2017-13852, CVE-2017-13844, CVE-2017-13805, CVE-2017-13804, CVE-2017-7113, CVE-2017-13783, CVE-2017-13784, CVE-2017-13785, CVE-2017-13788, CVE-2017-13791, CVE-2017-13792, CVE-2017-13793, CVE-2017-13794, CVE-2017-13795, CVE-2017-13796 , CVE-2017-13797 , CVE-2017-13798, CVE-2017-13802, CVE-2017-13803, CVE-2017-13077 , CVE-2017-13078, CVE-2017-13080 Suggested Action CCIRC recommends that owner/operators test and deploy the vendor released updates or workarounds to affected platforms. References: https://support.apple.com/en-ca/HT208222

Official advisory ↗
Canadian Centre for Cyber Security · English · AV17-161Apple security updates

17-13796, CVE-2017-13798, CVE-2017-13799, CVE-2017-13800, CVE-2017-13801, CVE-2017-13802, CVE-2017-13803, CVE-2017-13804, CVE-2017-13805, CVE-2017-13807, CVE-2017-13808, CVE-2017-13809, CVE-2017-13810, CVE-2017-13811, CVE-2017-13812, CVE-2017-13813, CVE-2017-13814, CVE-2017-13815, CVE-2017-13816, CVE-2017-13817, CVE-2017-13818, CVE-2017-13819, CVE-2017-13820, CVE-2017-13821, CVE-2017-13822, CVE-2017-13823, CVE-2017-13824, CVE-2017-13825, CVE-2017-13826, CVE-2017-13828, CVE-2017-13830, CVE-2017-13831, CVE-2017-13832, CVE-2017-13834, CVE-2017-13836, CVE-2017-13838, CVE-2017-13840, CVE-2017-13841, CVE-2017-13842, CVE-2017-13844, CVE-2017-13846, CVE-2017-13849, CVE-2017-3167, CVE-2017-3169, CVE-2017-7113, CVE-2017-7132, CVE-2017-7659, CVE-2017-7668, CVE-2017-7679, CVE-2017-9788, CVE-2017-9789 Suggested Action CCIRC recommends that owner/operators test and deploy the vendor released updates or workarounds to affected platforms. References https://support.apple.com/en-ca/HT208225 https://support.apple.com/en-ca/HT208224 https://support.apple.com/en-ca/HT208223 https://support.apple.com/en-ca/HT208219 https://support.apple.com/en-ca/HT208221 https://support.apple.com/en-ca/HT208222 https://support.apple.com/en-ca/HT208220

Official advisory ↗
CERT-FR · French · CERTFR-2017-AVI-385Multiples vulnérabilités dans les produits Apple

d?id=CVE-2017-13834 Référence CVE CVE-2017-13836 https://www.cve.org/CVERecord?id=CVE-2017-13836 Référence CVE CVE-2017-13838 https://www.cve.org/CVERecord?id=CVE-2017-13838 Référence CVE CVE-2017-13840 https://www.cve.org/CVERecord?id=CVE-2017-13840 Référence CVE CVE-2017-13841 https://www.cve.org/CVERecord?id=CVE-2017-13841 Référence CVE CVE-2017-13842 https://www.cve.org/CVERecord?id=CVE-2017-13842 Référence CVE CVE-2017-13843 https://www.cve.org/CVERecord?id=CVE-2017-13843 Référence CVE CVE-2017-13844 https://www.cve.org/CVERecord?id=CVE-2017-13844 Référence CVE CVE-2017-13846 https://www.cve.org/CVERecord?id=CVE-2017-13846 Référence CVE CVE-2017-13849 https://www.cve.org/CVERecord?id=CVE-2017-13849 Référence CVE CVE-2017-3167 https://www.cve.org/CVERecord?id=CVE-2017-3167 Référence CVE CVE-2017-3169 https://www.cve.org/CVERecord?id=CVE-2017-3169 Référence CVE CVE-2017-7113 https://www.cve.org/CVERecord?id=CVE-2017-7113 Référence CVE CVE-2017-7132 https://www.cve.org/CVERecord?id=CVE-2017-7132 Référence CVE CVE-2017-7659 https://www.cve.org/CVERecord?id=CVE-2017-7659 Référence CVE CVE-2017-7668 https://www.cve.org/CVERecord?id=CVE-2017-7668 Référence CVE CVE-2017-7679 https://www.cve.org/CVERecord?id=CVE-2017-7679 Référence CVE CVE-2017-9788 https://www.cve.org/CVERecord?id=CVE-2017-9788 R

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2017-010329複数の Apple 製品の CoreText コンポーネントにおけるサービス運用妨害 (DoS) の脆弱性

Apple iOS、tvOS、および watchOS の CoreText コンポーネントには、サービス運用妨害 (アプリケーションクラッシュ) 状態にされる脆弱性が存在します。

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.
Fix not verified
Affected
n/a
Fixed
No fixed version is explicitly recorded in the structured CVE data.
Action
No verified patch reference is present in the current structured sources. Check the vendor advisory before making a change.
Workaround
No verified workaround is recorded. Limit untrusted access and use least privilege until authoritative guidance is available.
04

Evidence and provenance

Published 13 Nov 2017 · Last source change 5 Aug 2024, 19:13 UTC · CWE-20 · Improper Input Validation

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-2017-5364
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.

Material change intelligence

What changed after publication

View recent updates ↗
  1. ENISA EUVD mappingEUVD-2017-5364 was added to the official ENISA EUVD mapping for this CVE.
    Before
    not recorded
    After
    {"euvdId":"EUVD-2017-5364"}
    ENISA EUVD ↗
  2. Vendor guidanceAuthoritative vendor guidance changed: added vendor advisory: support.apple.com/HT208219; added vendor advisory: support.apple.com/HT208220; 1 further additions.
    Before
    no authoritative guidance recorded
    After
    vendor advisory: support.apple.com/HT208219 · vendor advisory: support.apple.com/HT208220 · vendor advisory: support.apple.com/HT208222
    support.apple.com ↗
  3. SeveritySeverity changed from Unknown to Medium.
    Before
    Unknown
    After
    Medium
    NIST NVD ↗
  4. CVSS scoreCVSS score changed from not recorded to 5.5 (CVSS 3.0 · NIST NVD · CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H).
    Before
    not recorded
    After
    5.5 (CVSS 3.0 · NIST NVD · CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H)
    NIST NVD ↗
  5. Catalogue recordCVE added to the BlackTree catalogue.
    CNA ↗
Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
CVE published
ENISA EUVD · EUVD-2017-5364↗CVE authority or vendor reference↗Vendor advisory↗Vendor advisory↗Public exploit 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-2017-13849 · cve.blacktree.nl