Buffer overflow in Apple iOS And Ipados
CVE-2021-30851
A memory corruption vulnerability was addressed with improved locking. This issue is fixed in Safari 15, tvOS 15, watchOS 8, iOS 15 and iPadOS 15. Processing maliciously crafted web content may lead to code execution.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.024 (83.4th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 83rd percentile — 83.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.024 · newest: 0.024 · change: 0.000
Affected products
- Apple iOS And Ipados — versions unspecified
- Apple Ipados
- Apple Iphone OS
- Apple macOS — versions 12.0.1
- Apple Safari — versions unspecified
- Apple tvOS — versions unspecified
- Apple watchOS — versions unspecified
- Debian Linux — versions 10.0, 11.0
- Fedoraproject Fedora — versions 33, 34
Weakness classification (CWE)
Public proof-of-concept exploits
References
- support.apple.com/en-us/HT212814
- support.apple.com/en-us/HT212819
- support.apple.com/en-us/HT212815
- support.apple.com/en-us/HT212816
- support.apple.com/kb/HT212869
- www.debian.org/security/2021/dsa-4995 (vendor-advisory)
- www.debian.org/security/2021/dsa-4996 (vendor-advisory)
- www.openwall.com/lists/oss-security/2021/10/31/1 (mailing-list)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
Frequently asked questions
- What is CVE-2021-30851?
- CVE-2021-30851 is a high-severity vulnerability in Apple iOS And Ipados, classified under Out-of-bounds Write. CVSS score: 8.8/10. Published 2021-08-24.
- How severe is CVE-2021-30851?
- High severity. CVSS v3 base score is 8.8 out of 10.
- Is CVE-2021-30851 known to be exploited?
- 7 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.