Buffer overflow in Apple Icloud
CVE-2020-9999
A memory corruption issue was addressed with improved state management. This issue is fixed in macOS Big Sur 11.0.1, iTunes for Windows 12.10.9. Processing a maliciously crafted text file may lead to arbitrary code execution.
Vulnerability class: Buffer 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: 0.080 (94.6th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 95th percentile — 94.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.080 · newest: 0.080 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- support.apple.com/kb/HT211843 (Vendor Advisory)
- support.apple.com/kb/HT211850 (Vendor Advisory)
- support.apple.com/kb/HT211844 (Vendor Advisory)
- support.apple.com/kb/HT211935 (Vendor Advisory)
- support.apple.com/en-us/HT211931 (Vendor Advisory)
- support.apple.com/en-us/HT211952 (Vendor Advisory)
- seclists.org/fulldisclosure/2020/Dec/32 (mailing-list, Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2020-9999?
- CVE-2020-9999 is a high-severity vulnerability in Apple Icloud, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2020-12-08.
- How severe is CVE-2020-9999?
- High severity. CVSS v3 base score is 7.8 out of 10.
- Is CVE-2020-9999 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.