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CVE-2017-13876

Public exploit available. Not confirmed exploited in the wild yet. Fixed versions are out.

CVSS 3.07.8HighEPSS percentile92nd5.1% chance in 30 daysCISA KEVNot listedNo confirmed exploitation
Public exploit: 1 sourceFix4 products3 fixed builds listed below

Published Updated Sources: CVE.org, NVD

NVD CVE.org

What to do

Find your product and version, then upgrade to the build on the right.

  • Apple Iphone OsAffected: < 11.2Upgrade to: 11.2Stated by: NVD
  • Apple Mac Os XAffected: < 10.13.2Upgrade to: 10.13.2Stated by: NVD
  • Apple TvosAffected: < 11.2Upgrade to: 11.2Stated by: NVD
  • Apple WatchosAffected: < 4.2Upgrade to: 4.2Stated by: NVD

Versions as the sources state them. Full version matrix after sign-in

Steps

Written by AI from the record
  1. Check the installed version on every company iPhone, Mac, Apple TV, and Apple Watch.
  2. Update iPhones and Apple TVs to 11.2 or later, Macs to 10.13.2 or later, and Apple Watches to 4.2 or later.
  3. Remove or block unapproved apps, especially apps installed outside your normal business app process.
  4. Confirm devices complete the update and restart normally.
Vendor advisory Usually a quick update
Check it yourselfA free OpenVAS check exists for this CVE. Run it against your hosts.Is your organisation exposed?Request an assessment to establish which checks fit your systems.

What it is

From the CVE record

An issue was discovered in certain Apple products. iOS before 11.2 is affected. macOS before 10.13.2 is affected. tvOS before 11.2 is affected. watchOS before 4.2 is affected. The issue involves the "Kernel" component. It allows attackers to execute arbitrary code in a privileged context or cause a denial of service (memory corruption) via a crafted app.

In plain language

Written by AI from the record

This affects Apple devices running iOS before 11.2, macOS before 10.13.2, tvOS before 11.2, or watchOS before 4.2; update them because a malicious app can take control of the device.

Local privilege escalation and denial-of-service through kernel memory corruption triggered by execution of a crafted application.

If you're affected

  • Full device takeover
  • Business data exposure
  • Device outages
  • Malicious app risk

Exploitation

Where each signal puts this CVE on the scale from published to confirmed exploited.

EPSS92nd
Public exploit
CISA KEV

Not in the catalog. CISA has not confirmed exploitation.

Public exploits

1 source with a proof of concept or module.

Exploit links, PoCs and Metasploit modules after sign-in
EPSS

5.1% chance of exploitation activity in the next 30 days, which ranks it in the 92nd percentile of scored CVEs.

Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.

Lifecycle

A public exploit existed 67 days before the patch.

  1. EPSS band changemoderate → lowepss band change
  2. EPSS band changelow → moderateepss band change
  3. EPSS band changemoderate → 0epss band change
  4. EPSS band change0 → moderateepss band change
  5. EPSS band changemoderate → 0epss band change
  6. EPSS band changelow → moderate

Affected products

And 1 more affected product. See all after sign-in

Technical detail

CVSS 3.0 vector

Open in the CVSS calculator

CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Scored 7.8 by NVD.

How it is reached

  • Attack Vector LocalRequires local access to the vulnerable system (e.g. local login, malicious file)
  • Attack Complexity LowNo special conditions — the attack can be reliably reproduced
  • Privileges Required NoneNo authentication required — anyone can exploit this
  • User Interaction RequiredA user must click a link, open a file, or perform some action

Scope

  • Scope UnchangedImpact is limited to the vulnerable component itself

Impact if exploited

  • Confidentiality HighTotal information disclosure — all data in the component is compromised
  • Integrity HighTotal loss of integrity — attacker can modify any data in the component
  • Availability HighTotal denial of service — the component is completely unavailable

Weaknesses

ATT&CK techniques

Mapped from the weaknesses above (CWE to ATT&CK), not observed in attacks.

Sources

References in the record

And 6 more references. See all after sign-in

Watch the software you run.

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We'll flag the next CVE, public exploit or patch for Iphone Os, not every advisory. This one: public exploit.