CVE-2021-30851: A memory corruption vulnerability was addressed with improved locking

High severity · published Aug 24, 2021

CVE-2021-30851

A memory corruption vulnerability was addressed with improved locking

8.8

CVSS

2.4%

EPSS

On KEV

Description

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.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Attack vector

Network

Complexity

Low

Privileges

None

User interaction

Required

Confidentiality

High

Integrity

High

Availability

High

Scope

Unchanged

Exploitation

Is it being used?

Exploit prediction (EPSS)2.4% · higher than 84% of CVEs

Exploited in the wildNo evidence yet

CISA KEVNot listed

Ransomware campaign useNot known

Affected products

Which versions

iOS · Apple

before 15.0 · source: NVD

macOS · Apple

before 12.0.1; 12.0.1 · source: NVD

Debian Linux · Debian

10.0; 11.0 · source: NVD

Fedora · Fedoraproject

33; 34 · source: NVD

Safari · Apple

before 15.0 · source: NVD

Tvos · Apple

before 15.0 · source: NVD

Watchos · Apple

before 8.0 · source: NVD

Affected product

iOS

Apple

All iOS CVEs

References

NVD

https://nvd.nist.gov/vuln/detail/CVE-2021-30851

CVE.org

https://www.cve.org/CVERecord?id=CVE-2021-30851

www.openwall.com

http://www.openwall.com/lists/oss-security/2021/10/31/1

lists.fedoraproject.org

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/H6MGXCX7P5AHWOQ6IRT477UKT7IS4DAD/

lists.fedoraproject.org

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ON5SDVVPVPCAGFPW2GHYATZVZYLPW2L4/

support.apple.com

https://support.apple.com/en-us/HT212814

support.apple.com

https://support.apple.com/en-us/HT212815

support.apple.com

https://support.apple.com/en-us/HT212816