Exploited vulnerability · CISA KEV

Is CVE-2022-42856 exploited? Yes: in CISA KEV since 14 Dec 2022

Gociux · Apple iOS · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2022-42856, Apple iOS Type Confusion Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 14 Dec 2022. It affects Apple iOS. If you run it, CISA's required action is: Apply updates per vendor instructions.

exploitedYesCISA KEV · 14 Dec 2022

ransomwareNot knownno confirmed use

EPSStop 5%very likely to be exploited

severity8.8CVSS 3.1 · high

US federal due4 Jan 2023BOD 22-01 deadline

What it is

Apple iOS contains a type confusion vulnerability when processing maliciously crafted web content leading to code execution.

Vendor	Apple (96 exploited CVEs in KEV)
Product	iOS
Vulnerability	Apple iOS Type Confusion Vulnerability
Weakness	CWE-843
Published	15 Dec 2022
Added to KEV	14 Dec 2022
Reported by (CNA)	apple

What to do

Check whether you run it. Look for iOS in your asset inventory, including appliances and cloud images. Stack check lists every exploited Apple CVE at once.
Apply the fix. Apply updates per vendor instructions.
If you can't patch today, take the affected service off the internet or restrict who can reach it, and check its logs for signs of compromise since 15 Dec 2022.
Get told next time. Email alerts when CISA adds a CVE for Apple.

Other exploited CVEs in iOS

CVE-2016-4655: Apple iOS Information Disclosure Vulnerability (24 May 2022)
CVE-2016-4656: Apple iOS Memory Corruption Vulnerability (24 May 2022)
CVE-2016-4657: Apple iOS Webkit Memory Corruption Vulnerability (24 May 2022)
CVE-2019-7287: Apple iOS Memory Corruption Vulnerability (23 May 2022)
CVE-2021-30762: Apple iOS WebKit Use-After-Free Vulnerability (3 Nov 2021)
CVE-2021-30666: Apple iOS WebKit Buffer Overflow Vulnerability (3 Nov 2021)

References

Questions

Is CVE-2022-42856 being exploited?

Yes. CISA added CVE-2022-42856 to the Known Exploited Vulnerabilities catalog on 14 Dec 2022, which means there is reliable evidence of exploitation in the wild.

Is CVE-2022-42856 used in ransomware attacks?

CISA does not list known ransomware use for it. That can change, and exploitation alone is reason to fix it first.

How do I fix CVE-2022-42856?

Apply updates per vendor instructions. Check Apple's advisory for the fixed versions, and if you can't patch quickly, restrict access to the affected iOS and watch it for signs of compromise.

Sources: CISA KEV (exploitation, ransomware use, required action, due date), the CVE record (publication date, CVSS, CNA), NVD and FIRST EPSS (live score). More: all KEV additions in December 2022 · Apple scorecard · act-now radar.

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