Integer overflow in Apple iOS
CVE-2021-30860
An integer overflow was addressed with improved input validation. This issue is fixed in Security Update 2021-005 Catalina, iOS 14.8 and iPadOS 14.8, macOS Big Sur 11.6, watchOS 7.6.2. Processing a maliciously crafted PDF may lead to arbitrary code execution. Apple is aware of a report that this issue may have been actively exploited.
Vulnerability class: Integer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.760 (99.5th percentile), scored .
High probability of exploitation in the next 30 days — patch promptly. 100th percentile — 99.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.760 · newest: 0.760 · change: 0.000
Affected products
- Apple iOS — versions unspecified
- Apple Ipados
- Apple Iphone OS
- Apple macOS — versions unspecified
- Apple Mac OS X — versions 10.15.7
- Apple watchOS — versions unspecified
- Freedesktop Poppler
- Xpdfreader Xpdf
Weakness classification (CWE)
CISA KEV (Known Exploited Vulnerabilities)
This CVE is on the CISA KEV catalog, added on . 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: .
Required action: Apply updates per vendor instructions.
Public proof-of-concept exploits
References
- support.apple.com/en-us/HT212804 (Vendor Advisory)
- support.apple.com/en-us/HT212805 (Vendor Advisory)
- support.apple.com/en-us/HT212807 (Vendor Advisory)
- support.apple.com/en-us/HT212806 (Vendor Advisory)
- seclists.org/fulldisclosure/2021/Sep/28 (mailing-list, Mailing List, Third Party Advisory)
- seclists.org/fulldisclosure/2021/Sep/27 (mailing-list, Mailing List, Third Party Advisory)
- seclists.org/fulldisclosure/2021/Sep/25 (mailing-list, Mailing List, Third Party Advisory)
- seclists.org/fulldisclosure/2021/Sep/26 (mailing-list, Mailing List, Third Party Advisory)
- seclists.org/fulldisclosure/2021/Sep/40 (mailing-list, Mailing List, Third Party Advisory)
- seclists.org/fulldisclosure/2021/Sep/38 (mailing-list, Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-30860?
- CVE-2021-30860 is a high-severity vulnerability in Apple iOS, classified under Integer Overflow or Wraparound. CVSS score: 7.8/10. Published 2021-08-24.
- How severe is CVE-2021-30860?
- High severity. CVSS v3 base score is 7.8 out of 10.
- Is CVE-2021-30860 known to be exploited?
- Yes. CVE-2021-30860 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2021-11-03), indicating it is being actively exploited. 28 public proof-of-concept repositories are indexed.