CVE-2021-1879
Apple iOS, iPadOS, and watchOS Cross-Site Scriptin - [Actively Exploited]
Description
This issue was addressed by improved management of object lifetimes. This issue is fixed in iOS 12.5.2, iOS 14.4.2 and iPadOS 14.4.2, watchOS 7.3.3. Processing maliciously crafted web content may lead to universal cross site scripting. Apple is aware of a report that this issue may have been actively exploited..
INFO
Published Date :
April 2, 2021, 7:15 p.m.
Last Modified :
May 16, 2024, 1 a.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
2.7
Exploitability Score :
2.8
CISA KEV (Known Exploited Vulnerabilities)
For the benefit of the cybersecurity community and network defenders—and to help every organization better manage vulnerabilities and keep pace with threat activity—CISA maintains the authoritative source of vulnerabilities that have been exploited in the wild.
Apple iOS, iPadOS, and watchOS WebKit contains a cross-site scripting (XSS) vulnerability when processing maliciously crafted web content.
Apply updates per vendor instructions.
Public PoC/Exploit Available at Github
CVE-2021-1879 has a 3 public PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
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-2021-1879.
| URL | Resource |
|---|---|
| https://support.apple.com/en-us/HT212256 | Vendor Advisory |
| https://support.apple.com/en-us/HT212257 | Vendor Advisory |
| https://support.apple.com/en-us/HT212258 | Vendor Advisory |
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).
Ostorlab KEV: One-command to detect most remotely known exploitable vulnerabilities. Sourced from CISA KEV, Google's Tsunami, Ostorlab's Asteroid and Bug Bounty programs.
cisa-kev vulnerability 0day cisa exploits
because people want to test it
HTML
NIST BULK CVE Lookup
Python
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-1879 vulnerability anywhere in the article.
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The Hacker News
Russian Hackers Exploit Safari and Chrome Flaws in High-Profile Cyberattack
Cybersecurity researchers have flagged multiple in-the-wild exploit campaigns that leveraged now-patched flaws in Apple Safari and Google Chrome browsers to infect mobile users with information-steali ... Read more
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BleepingComputer
Russian APT29 hackers use iOS, Chrome exploits created by spyware vendors
The Russian state-sponsored APT29 hacking group has been observed using the same iOS and Android exploits created by commercial spyware vendors in a series of cyberattacks between November 2023 and Ju ... Read more
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Google
State-backed attackers and commercial surveillance vendors repeatedly use the same exploits
Our latest n-day exploit reporting shows that in an attack on Mongolian government websites, Russian-backed APT29 is suspected of using the same exploits as Intellexa and NSO. We’re sharing details an ... Read more
The following table lists the changes that have been made to the
CVE-2021-1879 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.
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CVE CISA KEV Update by 9119a7d8-5eab-497f-8521-727c672e3725
May. 16, 2024
Action Type Old Value New Value Changed Vulnerability Name Apple iOS, iPadOS, and watchOS Cross-Site Scripting (XSS) Vulnerability Apple iOS, iPadOS, and watchOS WebKit Cross-Site Scripting (XSS) Vulnerability -
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
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) 14.4.2 OR *cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:* versions from (excluding) 14.4.2 -
Initial Analysis by [email protected]
Apr. 09, 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:N/I:P/A:N) Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Changed Reference Type https://support.apple.com/en-us/HT212256 No Types Assigned https://support.apple.com/en-us/HT212256 Vendor Advisory Changed Reference Type https://support.apple.com/en-us/HT212257 No Types Assigned https://support.apple.com/en-us/HT212257 Vendor Advisory Changed Reference Type https://support.apple.com/en-us/HT212258 No Types Assigned https://support.apple.com/en-us/HT212258 Vendor Advisory Added CWE NIST CWE-79 Added CPE Configuration OR *cpe:2.3:o:apple:ipad_os:*:*:*:*:*:*:*:* versions up to (excluding) 14.4.2 *cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:* versions up to (excluding) 12.5.2 *cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:* versions from (including) 13.0 up to (excluding) 14.4.2 *cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:* versions up to (excluding) 7.3.3
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-1879 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-2021-1879
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.23 }} 0.01%
score
0.60941
percentile