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Iphone OsOperating system · Apple

CVE-2015-1103

HIGH · 7.5 CVSS v2.0 Published 2015-04-10
Fix available
A fix is available. Upgrade to after 10.10.2 or later.
See remediation →
84/100
Remediation priority · High
Remotely reachable No privileges Zero-click

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
The kernel in Apple iOS before 8.3, Apple OS X before 10.10.3, and Apple TV before 7.2 makes routing changes in response to ICMP_REDIRECT messages, which allows remote attackers to cause a denial of service (network outage) or obtain sensitive packet-content information via a crafted ICMP packet.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · high confidence

The kernel in Apple iOS before 8.3, OS X before 10.3, and Apple TV before 7.2 improperly processes ICMP_REDIRECT messages, allowing the kernel to make routing changes in response to crafted packets. This enables remote attackers to cause network outages or intercept sensitive packet content.

MitigationApply the vendor-supplied patches (iOS 8.3+, OS X 10.10.3+, Apple TV 7.2+) to all affected devices. Consider disabling ICMP redirect acceptance as a defensive measure if immediate patching is not feasible.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Iphone OsOperating system
Affected:<= 8.2
TvosOperating system
Affected:<= 7.1
Mac Os XOperating system
Affected:<= 10.10.2

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Authentication
None
Confidentiality
Partial
Integrity
Partial
Availability
Partial

AV:N/AC:L/Au:N/C:P/I:P/A:P

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Check iOS version on iPhone or iPad
    Go to Settings > General > About and look at the Version field. Alternatively, connect to a computer with iTunes and check the device summary page.
    Affected if Version is 8.2 or lower
  2. Check macOS version
    Open Terminal and run: sw_vers -productVersion. Or go to Apple menu > About This Mac.
    Affected if Version is 10.10.2 or lower (10.10, 10.9, etc.)
  3. Check Apple TV version
    Go to Settings > General > About on the Apple TV device and look at the Version number.
    Affected if Version is 7.1 or lower
  4. Check if ICMP redirects are accepted (macOS only)
    In Terminal, run: sysctl net.inet.icmp.redirect. A value of 1 means redirects are accepted, 0 means they are rejected.
    Affected if The sysctl value returns 1 (ICMP redirects are enabled)

You are affected if your device runs an unpatched iOS 8.2 or earlier, macOS 10.10.2 or earlier, or Apple TV 7.1 or earlier, AND the device accepts ICMP redirect packets.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

From vendor data
Upgrade available Upgrade to a release after 10.10.2
Interim mitigation

Apply the vendor-supplied patches (iOS 8.3+, OS X 10.10.3+, Apple TV 7.2+) to all affected devices. Consider disabling ICMP redirect acceptance as a defensive measure if immediate patching is not feasible.

Fix this in Iphone Os Scoped from the published advisory
  • Consultation2.0 h
  • Implementation4.0 h
  • Testing3.0 h
  • Review / QA2.0 h
11.0 hours of engineering $1,930
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2015-1103 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data