8.8
HIGH
CVE-2021-30851
Safari Memory Corruption Code Execution Vulnerability
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.

INFO

Published Date :

Aug. 24, 2021, 7:15 p.m.

Last Modified :

Nov. 7, 2023, 3:33 a.m.

Source :

[email protected]

Remotely Exploitable :

Yes !

Impact Score :

5.9

Exploitability Score :

2.8
Public PoC/Exploit Available at Github

CVE-2021-30851 has a 5 public PoC/Exploit available at Github. Go to the Public Exploits tab to see the list.

Affected Products

The following products are affected by CVE-2021-30851 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Apple macos
2 Apple iphone_os
3 Apple tvos
4 Apple watchos
5 Apple safari
6 Apple ipados
1 Fedoraproject fedora
1 Debian debian_linux
: Total Affected Vendor : 3 | Products : 8
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2021-30851.

URL Resource
http://www.openwall.com/lists/oss-security/2021/10/31/1
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/H6MGXCX7P5AHWOQ6IRT477UKT7IS4DAD/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ON5SDVVPVPCAGFPW2GHYATZVZYLPW2L4/
https://support.apple.com/en-us/HT212814
https://support.apple.com/en-us/HT212815
https://support.apple.com/en-us/HT212816
https://support.apple.com/en-us/HT212819
https://support.apple.com/kb/HT212869
https://www.debian.org/security/2021/dsa-4995
https://www.debian.org/security/2021/dsa-4996

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Profile Photo
TimerIzaya/fuzzilli-plus

None

Dockerfile Shell Swift JavaScript Python C

Updated: 2 weeks, 1 day ago
0 stars 0 fork 0 watcher
Born at : July 28, 2024, 8:12 a.m. This repo has been linked 60 different CVEs too.
Profile Photo
TimerIzaya/izayailli

None

Dockerfile Shell Swift JavaScript Python C

Updated: 2 months, 1 week ago
0 stars 0 fork 0 watcher
Born at : July 10, 2024, 7:52 a.m. This repo has been linked 56 different CVEs too.
Profile Photo
zhangjiahui-buaa/MasterThesis

None

Dockerfile Shell Swift JavaScript Python C

Updated: 4 months, 1 week ago
0 stars 0 fork 0 watcher
Born at : May 4, 2024, 7:46 a.m. This repo has been linked 60 different CVEs too.
Profile Photo
RUB-SysSec/JIT-Picker

None

Dockerfile Shell OCaml Swift C

Updated: 3 weeks, 3 days ago
60 stars 8 fork 8 watcher
Born at : Oct. 10, 2022, 1:34 p.m. This repo has been linked 38 different CVEs too.
Profile Photo
googleprojectzero/fuzzilli

A JavaScript Engine Fuzzer

C Swift Shell Dockerfile JavaScript Python

Updated: 1 week, 6 days ago
1851 stars 290 fork 290 watcher
Born at : March 20, 2019, 3:32 p.m. This repo has been linked 60 different CVEs too.

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2021-30851 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2021-30851 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • CVE Modified by [email protected]

    Nov. 07, 2023

    Action Type Old Value New Value
    Added Reference Apple Inc. https://support.apple.com/en-us/HT212814 [No types assigned]
    Added Reference Apple Inc. https://support.apple.com/en-us/HT212819 [No types assigned]
    Added Reference Apple Inc. https://support.apple.com/en-us/HT212815 [No types assigned]
    Added Reference Apple Inc. https://support.apple.com/en-us/HT212816 [No types assigned]
    Added Reference Apple Inc. https://support.apple.com/kb/HT212869 [No types assigned]
    Added Reference Apple Inc. https://www.debian.org/security/2021/dsa-4995 [No types assigned]
    Added Reference Apple Inc. https://www.debian.org/security/2021/dsa-4996 [No types assigned]
    Added Reference Apple Inc. http://www.openwall.com/lists/oss-security/2021/10/31/1 [No types assigned]
    Added Reference Apple Inc. https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ON5SDVVPVPCAGFPW2GHYATZVZYLPW2L4/ [No types assigned]
    Added Reference Apple Inc. https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/H6MGXCX7P5AHWOQ6IRT477UKT7IS4DAD/ [No types assigned]
    Removed Reference MITRE https://support.apple.com/en-us/HT212814
    Removed Reference MITRE https://support.apple.com/en-us/HT212815
    Removed Reference MITRE https://support.apple.com/en-us/HT212816
    Removed Reference MITRE https://support.apple.com/en-us/HT212819
    Removed Reference MITRE https://lists.fedoraproject.org/archives/list/[email protected]/message/ON5SDVVPVPCAGFPW2GHYATZVZYLPW2L4/
    Removed Reference MITRE http://www.openwall.com/lists/oss-security/2021/10/31/1
    Removed Reference MITRE https://www.debian.org/security/2021/dsa-4996
    Removed Reference MITRE https://www.debian.org/security/2021/dsa-4995
    Removed Reference MITRE https://lists.fedoraproject.org/archives/list/[email protected]/message/H6MGXCX7P5AHWOQ6IRT477UKT7IS4DAD/
    Removed Reference MITRE https://support.apple.com/kb/HT212869
  • CVE Source Update by [email protected]

    Nov. 07, 2023

    Action Type Old Value New Value
    Changed Source MITRE Apple Inc.
  • CPE Deprecation Remap by [email protected]

    Jan. 09, 2023

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:o:apple:ipad_os:*:*:*:*:*:*:*:* versions from (excluding) 15.0 OR *cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:* versions from (excluding) 15.0
  • Modified Analysis by [email protected]

    Nov. 23, 2021

    Action Type Old Value New Value
    Changed Reference Type http://www.openwall.com/lists/oss-security/2021/10/31/1 No Types Assigned http://www.openwall.com/lists/oss-security/2021/10/31/1 Mailing List, Third Party Advisory
    Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/H6MGXCX7P5AHWOQ6IRT477UKT7IS4DAD/ No Types Assigned https://lists.fedoraproject.org/archives/list/[email protected]/message/H6MGXCX7P5AHWOQ6IRT477UKT7IS4DAD/ Mailing List, Third Party Advisory
    Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/ON5SDVVPVPCAGFPW2GHYATZVZYLPW2L4/ No Types Assigned https://lists.fedoraproject.org/archives/list/[email protected]/message/ON5SDVVPVPCAGFPW2GHYATZVZYLPW2L4/ Mailing List, Third Party Advisory
    Changed Reference Type https://support.apple.com/kb/HT212869 No Types Assigned https://support.apple.com/kb/HT212869 Vendor Advisory
    Changed Reference Type https://www.debian.org/security/2021/dsa-4995 No Types Assigned https://www.debian.org/security/2021/dsa-4995 Third Party Advisory
    Changed Reference Type https://www.debian.org/security/2021/dsa-4996 No Types Assigned https://www.debian.org/security/2021/dsa-4996 Third Party Advisory
    Changed CPE Configuration OR *cpe:2.3:a:apple:safari:*:*:*:*:*:*:*:* versions up to (excluding) 15.0 *cpe:2.3:o:apple:ipad_os:*:*:*:*:*:*:*:* versions up to (excluding) 15.0 *cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:* versions up to (excluding) 15.0 *cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:* versions up to (excluding) 15.0 *cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:* versions up to (excluding) 8.0 OR *cpe:2.3:a:apple:safari:*:*:*:*:*:*:*:* versions up to (excluding) 15.0 *cpe:2.3:o:apple:ipad_os:*:*:*:*:*:*:*:* versions up to (excluding) 15.0 *cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:* versions up to (excluding) 15.0 *cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:* versions up to (excluding) 12.0.1 *cpe:2.3:o:apple:macos:12.0.1:*:*:*:*:*:*:* *cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:* versions up to (excluding) 15.0 *cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:* versions up to (excluding) 8.0
    Added CPE Configuration OR *cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* *cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
  • CVE Modified by [email protected]

    Nov. 19, 2021

    Action Type Old Value New Value
    Added Reference https://support.apple.com/kb/HT212869 [No Types Assigned]
  • CVE Modified by [email protected]

    Nov. 17, 2021

    Action Type Old Value New Value
    Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/ON5SDVVPVPCAGFPW2GHYATZVZYLPW2L4/ [No Types Assigned]
    Added Reference http://www.openwall.com/lists/oss-security/2021/10/31/1 [No Types Assigned]
    Added Reference https://www.debian.org/security/2021/dsa-4996 [No Types Assigned]
    Added Reference https://www.debian.org/security/2021/dsa-4995 [No Types Assigned]
    Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/H6MGXCX7P5AHWOQ6IRT477UKT7IS4DAD/ [No Types Assigned]
  • CVE Modified by [email protected]

    Nov. 10, 2021

    Action Type Old Value New Value
    Removed Reference http://www.openwall.com/lists/oss-security/2021/10/31/1 [Mailing List, Third Party Advisory]
    Removed Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/H6MGXCX7P5AHWOQ6IRT477UKT7IS4DAD/ [No Types Assigned]
    Removed Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/ON5SDVVPVPCAGFPW2GHYATZVZYLPW2L4/ [No Types Assigned]
    Removed Reference https://www.debian.org/security/2021/dsa-4995 [Vendor Advisory]
    Removed Reference https://www.debian.org/security/2021/dsa-4996 [Vendor Advisory]
  • CVE Modified by [email protected]

    Nov. 07, 2021

    Action Type Old Value New Value
    Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/ON5SDVVPVPCAGFPW2GHYATZVZYLPW2L4/ [No Types Assigned]
    Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/H6MGXCX7P5AHWOQ6IRT477UKT7IS4DAD/ [No Types Assigned]
  • Initial Analysis by [email protected]

    Nov. 01, 2021

    Action Type Old Value New Value
    Added CVSS V2 Metadata Victim must voluntarily interact with attack mechanism
    Added CVSS V2 NIST (AV:N/AC:M/Au:N/C:P/I:P/A:P)
    Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
    Changed Reference Type http://www.openwall.com/lists/oss-security/2021/10/31/1 No Types Assigned http://www.openwall.com/lists/oss-security/2021/10/31/1 Mailing List, Third Party Advisory
    Changed Reference Type https://support.apple.com/en-us/HT212814 No Types Assigned https://support.apple.com/en-us/HT212814 Vendor Advisory
    Changed Reference Type https://support.apple.com/en-us/HT212815 No Types Assigned https://support.apple.com/en-us/HT212815 Vendor Advisory
    Changed Reference Type https://support.apple.com/en-us/HT212816 No Types Assigned https://support.apple.com/en-us/HT212816 Vendor Advisory
    Changed Reference Type https://support.apple.com/en-us/HT212819 No Types Assigned https://support.apple.com/en-us/HT212819 Vendor Advisory
    Changed Reference Type https://www.debian.org/security/2021/dsa-4995 No Types Assigned https://www.debian.org/security/2021/dsa-4995 Vendor Advisory
    Changed Reference Type https://www.debian.org/security/2021/dsa-4996 No Types Assigned https://www.debian.org/security/2021/dsa-4996 Vendor Advisory
    Added CWE NIST CWE-787
    Added CPE Configuration OR *cpe:2.3:a:apple:safari:*:*:*:*:*:*:*:* versions up to (excluding) 15.0 *cpe:2.3:o:apple:ipad_os:*:*:*:*:*:*:*:* versions up to (excluding) 15.0 *cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:* versions up to (excluding) 15.0 *cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:* versions up to (excluding) 15.0 *cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:* versions up to (excluding) 8.0
    Added CPE Configuration OR *cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* *cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*
  • CVE Modified by [email protected]

    Oct. 31, 2021

    Action Type Old Value New Value
    Added Reference http://www.openwall.com/lists/oss-security/2021/10/31/1 [No Types Assigned]
  • CVE Modified by [email protected]

    Oct. 29, 2021

    Action Type Old Value New Value
    Added Reference https://www.debian.org/security/2021/dsa-4996 [No Types Assigned]
    Added Reference https://www.debian.org/security/2021/dsa-4995 [No Types Assigned]
  • CVE Modified by [email protected]

    Oct. 28, 2021

    Action Type Old Value New Value
    Changed Description ** REJECT ** DO NOT USE THIS CANDIDATE NUMBER. ConsultIDs: none. Reason: This candidate was withdrawn by the CVE program. Notes: none. 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.
    Added Reference https://support.apple.com/en-us/HT212814 [No Types Assigned]
    Added Reference https://support.apple.com/en-us/HT212815 [No Types Assigned]
    Added Reference https://support.apple.com/en-us/HT212816 [No Types Assigned]
    Added Reference https://support.apple.com/en-us/HT212819 [No Types Assigned]
  • CVE Unrejected by [email protected]

    Oct. 28, 2021

    Action Type Old Value New Value
  • CVE Rejected by [email protected]

    Aug. 24, 2021

    Action Type Old Value New Value
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2021-30851 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2021-30851 weaknesses.

Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.47 }} 0.01%

score

0.75517

percentile

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
: