What is CVE-2016-4657?

CVE-2016-4657 is a high-severity vulnerability in Apple Iphone_os, classified under Out-of-bounds Write. CVSS score: 8.8/10. Published 2016-08-25.

How severe is CVE-2016-4657?

High severity. CVSS v3 base score is 8.8 out of 10.

Is CVE-2016-4657 known to be exploited?

Yes. CVE-2016-4657 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-05-24), indicating it is being actively exploited. 19 public proof-of-concept repositories are indexed.

Buffer overflow in Apple Iphone_os

CVE-2016-4657

WebKit in Apple iOS before 9.3.5 allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a crafted web site.

Vulnerability class: Buffer Overflow

EPSS: 0.668 (99.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

Affected products

Apple Iphone_os
N/a — versions n/a

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

CISA KEV (Known Exploited Vulnerabilities)

This CVE is on the CISA KEV catalog, added on 2022-05-24. CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.

BOD 22-01 due date: 2022-06-14.

Required action: Apply updates per vendor instructions.

Public proof-of-concept exploits

References

product-security@apple.com (x_refsource_MISC, Broken Link)
product-security@apple.com (Exploit, x_refsource_MISC)
product-security@apple.com (Exploit, VDB Entry, Third Party Advisory, exploit, x_refsource_EXPLOIT-DB)
product-security@apple.com (VDB Entry, Third Party Advisory, vdb-entry, Broken Link, x_refsource_BID)
product-security@apple.com (x_refsource_CONFIRM, Release Notes, Vendor Advisory)
product-security@apple.com (vendor-advisory, x_refsource_APPLE, Mailing List, Broken Link, Vendor Advisory)
product-security@apple.com (VDB Entry, Third Party Advisory, vdb-entry, x_refsource_SECTRACK, Broken Link)
134c704f-9b21-4f2e-91b3-4a467353bcc0 (US Government Resource)

Frequently asked questions

What is CVE-2016-4657?: CVE-2016-4657 is a high-severity vulnerability in Apple Iphone_os, classified under Out-of-bounds Write. CVSS score: 8.8/10. Published 2016-08-25.
How severe is CVE-2016-4657?: High severity. CVSS v3 base score is 8.8 out of 10.
Is CVE-2016-4657 known to be exploited?: Yes. CVE-2016-4657 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-05-24), indicating it is being actively exploited. 19 public proof-of-concept repositories are indexed.