CVE-2020-6819
Mozilla Firefox And Thunderbird Use-After-Free Vul - [Actively Exploited]
Description
Under certain conditions, when running the nsDocShell destructor, a race condition can cause a use-after-free. We are aware of targeted attacks in the wild abusing this flaw. This vulnerability affects Thunderbird < 68.7.0, Firefox < 74.0.1, and Firefox ESR < 68.6.1.
INFO
Published Date :
April 24, 2020, 4:15 p.m.
Last Modified :
Feb. 2, 2024, 4:44 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
5.9
Exploitability Score :
2.2
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.
Mozilla Firefox and Thunderbird contain a race condition vulnerability when running the nsDocShell destructor under certain conditions. The race condition creates a use-after-free vulnerability, causing unspecified impacts.
Apply updates per vendor instructions.
Public PoC/Exploit Available at Github
CVE-2020-6819 has a 1 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-2020-6819
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.
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-2020-6819.
| URL | Resource |
|---|---|
| https://bugzilla.mozilla.org/show_bug.cgi?id=1620818 | Exploit Issue Tracking |
| https://usn.ubuntu.com/4335-1/ | Third Party Advisory |
| https://www.mozilla.org/security/advisories/mfsa2020-11/ | Vendor Advisory |
| https://www.mozilla.org/security/advisories/mfsa2020-14/ | 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
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2020-6819 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2020-6819 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 -
Reanalysis by [email protected]
Feb. 02, 2024
Action Type Old Value New Value Changed Reference Type https://bugzilla.mozilla.org/show_bug.cgi?id=1620818 Issue Tracking, Permissions Required https://bugzilla.mozilla.org/show_bug.cgi?id=1620818 Exploit, Issue Tracking Added CWE NIST CWE-416 -
CWE Remap by [email protected]
Jul. 12, 2022
Action Type Old Value New Value Changed CWE CWE-416 CWE-787 CWE-362 -
CWE Remap by [email protected]
Jul. 21, 2021
Action Type Old Value New Value Changed CWE CWE-416 CWE-416 CWE-787 -
Initial Analysis by [email protected]
May. 01, 2020
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:M/Au:N/C:P/I:P/A:P) Added CVSS V3.1 NIST AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H Changed Reference Type https://bugzilla.mozilla.org/show_bug.cgi?id=1620818 No Types Assigned https://bugzilla.mozilla.org/show_bug.cgi?id=1620818 Issue Tracking, Permissions Required Changed Reference Type https://usn.ubuntu.com/4335-1/ No Types Assigned https://usn.ubuntu.com/4335-1/ Third Party Advisory Changed Reference Type https://www.mozilla.org/security/advisories/mfsa2020-11/ No Types Assigned https://www.mozilla.org/security/advisories/mfsa2020-11/ Vendor Advisory Changed Reference Type https://www.mozilla.org/security/advisories/mfsa2020-14/ No Types Assigned https://www.mozilla.org/security/advisories/mfsa2020-14/ Vendor Advisory Added CWE NIST CWE-416 Added CPE Configuration OR *cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* versions up to (excluding) 74.0.1 *cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:* versions up to (excluding) 68.6.1 *cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* versions up to (excluding) 68.7.0 -
CVE Modified by [email protected]
Apr. 29, 2020
Action Type Old Value New Value Added Reference https://usn.ubuntu.com/4335-1/ [No Types Assigned]
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2020-6819 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-2020-6819
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
3.37 }} 1.01%
score
0.91442
percentile