What is CVE-2017-2423?

CVE-2017-2423 is a critical-severity vulnerability in Apple Iphone OS, classified under Improper Verification of Cryptographic Signature. CVSS score: 9.8/10. Published 2017-04-02.

How severe is CVE-2017-2423?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Vulnerability in Apple Iphone OS

CVE-2017-2423

An issue was discovered in certain Apple products. iOS before 10.3 is affected. macOS before 10.12.4 is affected. The issue involves the "Security" component. It allows remote attackers to bypass intended access restrictions by leveraging a successful result from a SecKeyRawVerify API call with an empty signature.

Published 2017-04-02 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.017 (77.0th percentile), scored 2026-10-02.

Low probability of exploitation in the next 30 days, but still tracked. 77th percentile — 77.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.017 · newest: 0.017 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-347 — Improper Verification of Cryptographic Signature

References

www.securityfocus.com/bid/97147 (VDB Entry, Third Party Advisory, vdb-entry)
support.apple.com/HT207615 (Vendor Advisory)
www.securitytracker.com/id/1038138 (vdb-entry)
support.apple.com/HT207617 (Vendor Advisory)

Frequently asked questions

What is CVE-2017-2423?: CVE-2017-2423 is a critical-severity vulnerability in Apple Iphone OS, classified under Improper Verification of Cryptographic Signature. CVSS score: 9.8/10. Published 2017-04-02.
How severe is CVE-2017-2423?: Critical severity. CVSS v3 base score is 9.8 out of 10.