Actively exploited · Published Aug 25, 2016 · Assigned by apple

CVE-2016-4657

High 8.8 Exploited

In plain English

A high-severity out-of-bounds write in iOS from Apple. Attackers are actively exploiting it in the wild (listed by CISA on May 24, 2022). The chance it is exploited in the next 30 days is estimated at 66.8% (higher than 99.3% of all known vulnerabilities). Ready-made attack tooling exists: Metasploit, public proof-of-concept code. Apply updates per vendor instructions.

Severity (CVSS 3.1)8.8High

Exploit odds (30 days)66.8%top 0.7% of all CVEs

Exploited in the wildYesCISA KEV since May 24, 2022

Attack tooling2Metasploit, Public PoC

CISA guidance

Apply updates per vendor instructions.

Federal agencies must remediate by Jun 14, 2022.

Official description

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.

Affected products (as reported)

Vendor	Product	Versions
n/a	n/a	n/a

Weakness: CWE-787 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

References

https://blog.lookout.com/blog/2016/08/25/trident-pegasus/ x_refsource_MISC
https://www.youtube.com/watch?v=xkdPjbaLngE x_refsource_MISC
44836 exploit, x_refsource_EXPLOIT-DB
92653 vdb-entry, x_refsource_BID
https://support.apple.com/HT207107 x_refsource_CONFIRM
APPLE-SA-2016-08-25-1 vendor-advisory, x_refsource_APPLE
1036694 vdb-entry, x_refsource_SECTRACK
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2016-4657 government-resource