CVE-2020-9943 json
An out-of-bounds read was addressed with improved bounds checking.
published 5y ago modified 4mo ago also EUVD-2020-30722
- cvss
- 5.5
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.2%
- EPSS 1.2% chance of exploitation in 30 days, percentile 67%
- public exploits
- 0
- none known
Summary
An out-of-bounds read was addressed with improved bounds checking. This issue is fixed in macOS Big Sur 11.0.1, watchOS 7.0, tvOS 14.0, iOS 14.0 and iPadOS 14.0. A malicious application may be able to read restricted memory.
Patch / fix
- Apple tvOS 14.0
- Apple watchOS 7.0
- Apple iOS and iPadOS 14.0
- Apple macOS 11.0
Is CVE-2020-9943 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerExploit prediction
1.15% chance of exploitation in the next 30 days, higher than 67% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 5.5 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N |
| NVD | 2.0 | 4.3 | AV:N/AC:M/Au:N/C:P/I:N/A:N |
Affected products
- Apple tvOS
- Apple watchOS
- Apple iOS and iPadOS
- Apple macOS
Classification
- Weakness
-
- CWE-125 Out-of-bounds Read
References
-
support.apple.com
/en-us/HT211843
release-notes, vendor-advisory
-
support.apple.com
/en-us/HT211850
release-notes, vendor-advisory
-
support.apple.com
/en-us/HT211844
release-notes, vendor-advisory
-
support.apple.com
/en-us/HT211931
release-notes, vendor-advisory
-
support.apple.com
/kb/HT212011
vendor-advisory
-
seclists.org
/fulldisclosure/2020/Dec/32
mailing-list, third-party-advisory
-
seclists.org
/fulldisclosure/2020/Dec/26
mailing-list, third-party-advisory
Sources
- CVE List CVE-2020-9943
- NVD CVE-2020-9943
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.