CVE-2021-21206
published 2021-04-26CVE-2021-21206: Use after free in Blink in Google Chrome prior to 89.0.4389.128 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.
PriorityP182high8.8CVSS 3.1
AVNACLPRNUIRSUCHIHAH
KEVITW
CISA Known Exploited Vulnerabilitydue 2021-11-17
Exploited in the wild
EPSS
9.40%
94.8th percentile
Use after free in Blink in Google Chrome prior to 89.0.4389.128 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.
Affected
12 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| chromium | chromium | >= 0 < 90.0.4430.72-1 | 90.0.4430.72-1 |
| chromium | chromium | >= 0 < 90.0.4430.72-1 | 90.0.4430.72-1 |
| chromium | chromium | >= 0 < 90.0.4430.72-1 | 90.0.4430.72-1 |
| chromium | chromium | >= 0 < 90.0.4430.72-1 | 90.0.4430.72-1 |
| debian | chromium | < chromium 90.0.4430.72-1 (bookworm) | chromium 90.0.4430.72-1 (bookworm) |
| fedoraproject | fedora | — | — |
| fedoraproject | fedora | — | — |
| fedoraproject | fedora | — | — |
| chrome | < 89.0.4389.128 | 89.0.4389.128 | |
| chrome | >= unspecified < 89.0.4389.128 | 89.0.4389.128 | |
| chrome_chrome | — | — | |
| msrc | microsoft_edge | — | — |
Detection & IOCsextracted from sources · hover to see the quote
- →CVE-2021-21206 is a use-after-free in Blink (Google Chrome < 89.0.4389.128) confirmed exploited in the wild; any Chrome/Edge/Chromium-based browser below the fixed version should be flagged ↗
- →Exploitation vector is a crafted HTML page delivered remotely; monitor for suspicious renderer process crashes or heap-corruption signals originating from Blink rendering engine ↗
- →This vulnerability could affect multiple Chromium-based browsers beyond Chrome; broaden detection scope to include Microsoft Edge and Opera ↗
- ·Severity is rated High by Chrome; exploitation is in-the-wild per Microsoft MSRC ↗
- ·The vulnerability was reported anonymously, limiting threat-actor attribution for targeted detection ↗
CVSS provenance
nvdv3.18.8HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
nvdv2.06.8MEDIUMAV:N/AC:M/Au:N/C:P/I:P/A:P
osv8.8HIGH
vulncheck8.8HIGH
cisa8.8HIGH
vendor_debian8.8HIGH
vendor_msrc8.8HIGH
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GHSA
GHSA-g8g5-f7qq-6h9m: Use after free in Blink in Google Chrome prior to 89
ghsa_unreviewed·2022-05-24
CVE-2021-21206 [HIGH] CWE-416 GHSA-g8g5-f7qq-6h9m: Use after free in Blink in Google Chrome prior to 89
Use after free in Blink in Google Chrome prior to 89.0.4389.128 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.
Project0
The More You Know, The More You Know You Don’t Know - Project Zero
project_zero·2022-04-01
CVE-2016-4654 The More You Know, The More You Know You Don’t Know - Project Zero
A Year in Review of 0-days Used In-the-Wild in 2021
Posted by Maddie Stone, Google Project Zero
This is our third annual year in review of 0-days exploited in-the-wild [2020, 2019]. Each year we’ve looked back at all of the detected and disclosed in-the-wild 0-days as a group and synthesized what we think the trends and takeaways are. The goal of this report is not to detail each individual exploit, but instead to analyze the exploits from the year as a group, looking for trends, gaps, lessons learned, successes, etc. If you’re interested in the analysis of individual exploits, please check out our root cause analysis repository.
We perform and share this analysis in order to make 0-day hard. We want it to be more costly, more resource intensive, and overall more difficult for
OSV
CVE-2021-21206: Use after free in Blink in Google Chrome prior to 89
osv·2021-04-26·CVSS 8.8
CVE-2021-21206 [HIGH] CVE-2021-21206: Use after free in Blink in Google Chrome prior to 89
Use after free in Blink in Google Chrome prior to 89.0.4389.128 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.
VulnCheck
Google Chromium Blink Use-After-Free Vulnerability
vulncheck·2021·CVSS 8.8
CVE-2021-21206 [HIGH] CWE-416 Google Chromium Blink Use-After-Free Vulnerability
Google Chromium Blink Use-After-Free Vulnerability
Google Chromium Blink contains a use-after-free vulnerability that allows a remote attacker to potentially exploit heap corruption via a crafted HTML page. This vulnerability could affect multiple web browsers that utilize Chromium, including, but not limited to, Google Chrome, Microsoft Edge, and Opera.
Affected: Google Chromium Blink
Required Action: Apply updates per vendor instructions.
Exploitation References: https://docs.google.com/spreadsheets/d/1lkNJ0uQwbeC1ZTRrxdtuPLCIl7mlUreoKfSIgajnSyY/edit; https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json
Remediation Due: 2021-11-17
Project0
Project Zero RCA: CVE-2021-21206: Chrome Use-After-Free in Animations
project_zero·CVSS 8.8
CVE-2021-21206 [HIGH] Project Zero RCA: CVE-2021-21206: Chrome Use-After-Free in Animations
# CVE-2021-21206: Chrome Use-After-Free in Animations
*Brendon Tiszka, Chrome*
## The Basics
**Disclosure or Patch Date:** Apr 7, 2021
**Product:** Google Chrome
**Advisory:** https://chromereleases.googleblog.com/2021/04/stable-channel-update-for-desktop.html
**Affected Versions:** pre 89.0.4389.114 (likely to M59)
**First Patched Version:** 89.0.4389.128
**Issue/Bug Report:** 1196781
**Patch CL:** https://chromium-review.googlesource.com/c/chromium/src/+/2812000
**Bug-Introducing CL:** N/A, likely https://codereview.chromium.org/2808013002
**Reporter(s):** Anonymous
## The Code
**Proof-of-concept:**
```html
function run() {
let div = document.createElement('div');
document.body.appendChild(div);
let animation = div.animate([ {opacity: 0.1} ], 1);
Object.defineProperty(Obj
CISA
Google Chromium Blink Use-After-Free Vulnerability
cisa·2021-11-03·CVSS 8.8
CVE-2021-21206 [HIGH] CWE-416 Google Chromium Blink Use-After-Free Vulnerability
Vulnerability: Google Chromium Blink Use-After-Free Vulnerability
Affected: Google Chromium Blink
Google Chromium Blink contains a use-after-free vulnerability that allows a remote attacker to potentially exploit heap corruption via a crafted HTML page. This vulnerability could affect multiple web browsers that utilize Chromium, including, but not limited to, Google Chrome, Microsoft Edge, and Opera.
Required Action: Apply updates per vendor instructions.
Notes: https://nvd.nist.gov/vuln/detail/CVE-2021-21206
Remediation Due Date: 2021-11-17
Chrome
Stable Channel Update for Desktop: CVE-2021-21206
vendor_chrome·2021-04-13·CVSS 8.8
CVE-2021-21206 [HIGH] Stable Channel Update for Desktop: CVE-2021-21206
Stable Channel Update for Desktop
CVE-2021-21206: Use after free in Blink. Reported by Anonymous on 2021-04-07 [$N/A][ 1196683 ] High CVE-2021-21220: Insufficient validation of untrusted input in V8 for x86_64
Reported by Bruno Keith (@bkth_) & Niklas Baumstark (@_niklasb) of Dataflow Security (@dfsec_it) via ZDI (ZDI-CAN-13569) on 2021-04-07 We would also like to thank all security researchers that worked with us during the development cycle to prevent security bugs from ever reaching the stable channel
Severity: high
Microsoft
Chromium: CVE-2021-21206 Use after free in Blink
vendor_msrc·2021-04-13·CVSS 8.8
CVE-2021-21206 [HIGH] Chromium: CVE-2021-21206 Use after free in Blink
Chromium: CVE-2021-21206 Use after free in Blink
Description: This CVE was assigned by Chrome. Microsoft Edge (Chromium-based) ingests Chromium, which addresses this vulnerability. Please see Google Chrome Releases for more information.
Microsoft is aware of reports that exploits for CVE-2021-21206 exist in the wild.
FAQ: What is the version information for this release?
Microsoft Edge Version
Date Released
Based on Chromium Version
89.0.774.77
4/14/2021
89.0.4389.128
FAQ: Why is this Chrome CVE included in the Security Update Guide?
The vulnerability assigned to this CVE is in Chromium Open Source Software (OSS) which is consumed by Microsoft Edge (Chromium-based). It is being documented in the Security Update Guide to announce that the latest version of Microsoft Edge (Chromium-b
Debian
CVE-2021-21206: chromium - Use after free in Blink in Google Chrome prior to 89.0.4389.128 allowed a remote...
vendor_debian·2021·CVSS 8.8
CVE-2021-21206 [HIGH] CVE-2021-21206: chromium - Use after free in Blink in Google Chrome prior to 89.0.4389.128 allowed a remote...
Use after free in Blink in Google Chrome prior to 89.0.4389.128 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.
Scope: local
bookworm: resolved (fixed in 90.0.4430.72-1)
bullseye: resolved (fixed in 90.0.4430.72-1)
forky: resolved (fixed in 90.0.4430.72-1)
sid: resolved (fixed in 90.0.4430.72-1)
trixie: resolved (fixed in 90.0.4430.72-1)
No detection rules found.
No public exploits indexed.
Qualys
Managing CISA Known Exploited Vulnerabilities with Qualys VMDR | Qualys
blogs_qualys·2022-02-23
Managing CISA Known Exploited Vulnerabilities with Qualys VMDR | Qualys
#### Table of Contents
- Situation
- Directive Scope
- CISA Catalog of Known Exploited Vulnerabilities
- Detect CISA Vulnerabilities Using Qualys VMDR
- CISA Exploited RTI
- Detailed Operational Dashboard
- Remediation
- Federal Enterprises and Agencies Can Act Now
- Summary
- Getting Started
CISA released a directive in November 2021, recommending urgent and prioritized remediation of actively exploited vulnerabilities. Both government agencies and corporations should heed this advice. This blog outlines how Qualys Vulnerability Management, Detection & Response can be used by any organization to respond to this directive efficiently and effectively.
## Situation
Last November 2021, the U.S. Cybersecurity and Infrastructure Security Agency (CISA) released a Binding Operational Directiv
Qualys
Qualys Response to CISA Alert: Binding Operational Directive 22-01
blogs_qualys·2021-11-09
Qualys Response to CISA Alert: Binding Operational Directive 22-01
## Table of Contents
Overview
Directive Scope
CISA Catalog of Known Exploited Vulnerabilities
Detect CISAs Vulnerabilities Using Qualys VMDR
Remediation
Federal Enterprises and Agencies Can Act Now
Summary
Getting Started
Start your VMDR 30-day, no-cost trial today
## Overview
On November 3, 2021, the U.S. Cybersecurity and Infrastructure Security Agency (CISA) released a Binding Operational Directive 22-01 , “Reducing the Significant Risk of Known Exploited Vulnerabilities.” This directive recommends urgent and prioritized remediation of the vulnerabilities that adversaries are actively exploiting. It establishes a CISA-managed catalog of known exploited vulnerabilities that carry significant risk to the federal government and establishes requirements for agencies to remediate
Qualys
Qualys Response to CISA Alert: Binding Operational Directive 22-01 | Qualys
blogs_qualys·2021-11-09
Qualys Response to CISA Alert: Binding Operational Directive 22-01 | Qualys
#### Table of Contents
- Overview
- Directive Scope
- CISA Catalog of Known Exploited Vulnerabilities
- Detect CISAs Vulnerabilities Using Qualys VMDR
- Remediation
- Federal Enterprises and Agencies Can Act Now
- Summary
- Getting Started
Start your VMDR 30-day, no-cost trial today
## Overview
On November 3, 2021, the U.S. Cybersecurity and Infrastructure Security Agency (CISA) released a Binding Operational Directive 22-01, “Reducing the Significant Risk of Known Exploited Vulnerabilities.” This directive recommends urgent and prioritized remediation of the vulnerabilities that adversaries are actively exploiting. It establishes a CISA-managed catalog of known exploited vulnerabilities that carry significant risk to the federal government and establishes requirements for agencies to
https://chromereleases.googleblog.com/2021/04/stable-channel-update-for-desktop.htmlhttps://crbug.com/1196781https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EAJ42L4JFPBJATCZ7MOZQTUDGV4OEHHG/https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/U3GZ42MYPGD35V652ZPVPYYS7A7LVXVY/https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VUZBGKGVZADNA3I24NVG7HAYYUTOSN5A/https://security.gentoo.org/glsa/202104-08https://chromereleases.googleblog.com/2021/04/stable-channel-update-for-desktop.htmlhttps://crbug.com/1196781https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EAJ42L4JFPBJATCZ7MOZQTUDGV4OEHHG/https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/U3GZ42MYPGD35V652ZPVPYYS7A7LVXVY/https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VUZBGKGVZADNA3I24NVG7HAYYUTOSN5A/https://security.gentoo.org/glsa/202104-08https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-21206
2021-04-26
Published
2021-11-03
Added to CISA KEV
Exploited in the wild