CVE-2016-4657
Apple iOS: Webkit Memory Corruption
As of , CVE-2016-4657 in Apple iOS is on CISA's list of exploited vulnerabilities: CISA listed it on . Our patch-first group: Patch this week.
- Exploited
- Yes: CISA listed it on 24 May 2022
- US federal deadline
- 14 June 202221 days after CISA listed it. US federal civilian agencies must fix it by then.
- Used in ransomware campaigns
- Not known to CISA
- EPSS score
- 0.67Higher than 99% of the CVEs EPSS scores. EPSS estimates the chance of exploitation activity in the next 30 days.
- EPSS when listed
- 0.39 on 24 May 2022EPSS on the day CISA listed it.
- Public exploit
- 1 Metasploit module and 2 Exploit-DB entries (1 verified)
- Fix
- No vendor link in CISA's entry
What CISA says to do
Apply updates per vendor instructions.
CISA's required action
What the flaw is
Apple iOS WebKit contains a memory corruption vulnerability that allows attackers to execute remote code or cause a denial-of-service (DoS) via a crafted web site. This vulnerability could impact HTML parsers that use WebKit, including but not limited to Apple Safari and non-Apple products which rely on WebKit for HTML processing.
CISA's 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.
The CVE record's description, from apple
- CVE published
- 25 August 2016
- Assigned by
- apple
- CVSS
- 8.8 High (CVSS 3.1, from CISA-ADP)
- CWE-787
- Out-of-bounds Write
- CWE-119
- Improper Restriction of Operations within the Bounds of a Memory Buffer
- CISA SSVC, exploitation
- active
- CISA SSVC, automatable
- no
- CISA SSVC, technical impact
- total
Timeline
- The CVE record was published.
- Exploit-DB published an exploit (EDB-ID 44213).
- Exploit-DB published an exploit (EDB-ID 44836).
- CISA added it to its list of exploited vulnerabilities.
- The US federal deadline to fix it.
Public exploits
Facts from Metasploit's module list and Exploit-DB's index; we never copy exploit code.
- Metasploit: WebKit not_number defineProperties UAFexploit module, rank manual
- Exploit-DB: WebKit - not_number defineProperties UAF (Metasploit)EDB-ID 44836, verified by Exploit-DB, 5 June 2018
- Exploit-DB: Nintendo Switch - WebKit Code Execution (PoC)EDB-ID 44213, 12 March 2017
iOS: other exploited entries
| Vulnerability | Product | Our group | Listed | Deadline | EPSS |
|---|---|---|---|---|---|
| CVE-2016-4655Information Disclosure | Apple iOS | Patch this weekMetasploit module; verified Exploit-DB entry | 0.33 | ||
| CVE-2016-4656Memory Corruption | Apple iOS | Patch this weekMetasploit module; verified Exploit-DB entry | 0.24 | ||
| CVE-2021-30761WebKit Memory Corruption | Apple iOS | Patch soon | 0.11 | ||
| CVE-2021-30762WebKit Use-After-Free | Apple iOS | Patch soon | 0.11 | ||
| CVE-2022-42856Type Confusion | Apple iOS | Patch soon | 0.09 | ||
| CVE-2019-7287Memory Corruption | Apple iOS | Patch soon | 0.05 | ||
| CVE-2021-30666WebKit Buffer Overflow | Apple iOS | Patch soon | 0.03 |
Read further
- CVE recordcve.org
- NVD entrynvd.nist.gov
- CISA's catalogcisa.gov
- EPSS for this CVEapi.first.org