CVE-2021-29946
Mozilla Firefox Integer Overflow Alt-Svc Header Bypass
Description
Ports that were written as an integer overflow above the bounds of a 16-bit integer could have bypassed port blocking restrictions when used in the Alt-Svc header. This vulnerability affects Firefox ESR < 78.10, Thunderbird < 78.10, and Firefox < 88.
INFO
Published Date :
June 24, 2021, 2:15 p.m.
Last Modified :
June 25, 2021, 8:06 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
5.9
Exploitability Score :
2.8
Affected Products
The following products are affected by CVE-2021-29946
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-2021-29946.
| URL | Resource |
|---|---|
| https://bugzilla.mozilla.org/show_bug.cgi?id=1698503 | Permissions Required Vendor Advisory |
| https://www.mozilla.org/security/advisories/mfsa2021-14/ | Release Notes Vendor Advisory |
| https://www.mozilla.org/security/advisories/mfsa2021-15/ | Release Notes Vendor Advisory |
| https://www.mozilla.org/security/advisories/mfsa2021-16/ | Release Notes 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).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-29946 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-29946 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 -
Initial Analysis by [email protected]
Jun. 25, 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 https://bugzilla.mozilla.org/show_bug.cgi?id=1698503 No Types Assigned https://bugzilla.mozilla.org/show_bug.cgi?id=1698503 Permissions Required, Vendor Advisory Changed Reference Type https://www.mozilla.org/security/advisories/mfsa2021-14/ No Types Assigned https://www.mozilla.org/security/advisories/mfsa2021-14/ Release Notes, Vendor Advisory Changed Reference Type https://www.mozilla.org/security/advisories/mfsa2021-15/ No Types Assigned https://www.mozilla.org/security/advisories/mfsa2021-15/ Release Notes, Vendor Advisory Changed Reference Type https://www.mozilla.org/security/advisories/mfsa2021-16/ No Types Assigned https://www.mozilla.org/security/advisories/mfsa2021-16/ Release Notes, Vendor Advisory Added CWE NIST CWE-190 Added CPE Configuration OR *cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* versions up to (excluding) 88.0 *cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:* versions up to (excluding) 78.10 *cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* versions up to (excluding) 78.10
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-29946 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-2021-29946
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.28 }} 0.03%
score
0.68040
percentile