CVE-2021-4217
'Zip' Null Pointer Dereference Vulnerability
Description
A flaw was found in unzip. The vulnerability occurs due to improper handling of Unicode strings, which can lead to a null pointer dereference. This flaw allows an attacker to input a specially crafted zip file, leading to a crash or code execution.
INFO
Published Date :
Aug. 24, 2022, 4:15 p.m.
Last Modified :
Nov. 21, 2024, 6:37 a.m.
Remotely Exploit :
No
Source :
[email protected]
Affected Products
The following products are affected by CVE-2021-4217
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.
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | LOW | [email protected] |
Solution
- Update the affected unzip packages.
- Apply the latest security updates.
Public PoC/Exploit Available at Github
CVE-2021-4217 has a 4 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-2021-4217.
| URL | Resource |
|---|---|
| https://access.redhat.com/security/cve/CVE-2021-4217 | Third Party Advisory |
| https://bugs.launchpad.net/ubuntu/+source/unzip/+bug/1957077 | Exploit Issue Tracking Patch Third Party Advisory |
| https://bugzilla.redhat.com/show_bug.cgi?id=2044583 | Exploit Issue Tracking Third Party Advisory |
| https://access.redhat.com/security/cve/CVE-2021-4217 | Third Party Advisory |
| https://bugs.launchpad.net/ubuntu/+source/unzip/+bug/1957077 | Exploit Issue Tracking Patch Third Party Advisory |
| https://bugzilla.redhat.com/show_bug.cgi?id=2044583 | Exploit Issue Tracking Third Party Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-4217 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-2021-4217
weaknesses.
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).
None
None
Dockerfile Java HTML
None
Shell Dockerfile C
Toolkit for k8s administrators/developers.
Dockerfile Shell
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-4217 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-4217 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 af854a3a-2127-422b-91ae-364da2661108
Nov. 21, 2024
Action Type Old Value New Value Added Reference https://access.redhat.com/security/cve/CVE-2021-4217 Added Reference https://bugs.launchpad.net/ubuntu/+source/unzip/+bug/1957077 Added Reference https://bugzilla.redhat.com/show_bug.cgi?id=2044583 -
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Reanalysis by [email protected]
Nov. 29, 2022
Action Type Old Value New Value Removed CVSS V3.1 NIST AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Added CVSS V3.1 NIST AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L -
Initial Analysis by [email protected]
Aug. 29, 2022
Action Type Old Value New Value Added CVSS V3.1 NIST AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Changed Reference Type https://access.redhat.com/security/cve/CVE-2021-4217 No Types Assigned https://access.redhat.com/security/cve/CVE-2021-4217 Third Party Advisory Changed Reference Type https://bugs.launchpad.net/ubuntu/+source/unzip/+bug/1957077 No Types Assigned https://bugs.launchpad.net/ubuntu/+source/unzip/+bug/1957077 Exploit, Issue Tracking, Patch, Third Party Advisory Changed Reference Type https://bugzilla.redhat.com/show_bug.cgi?id=2044583 No Types Assigned https://bugzilla.redhat.com/show_bug.cgi?id=2044583 Exploit, Issue Tracking, Third Party Advisory Added CWE NIST CWE-476 Added CPE Configuration OR *cpe:2.3:a:unzip_project:unzip:6.0:*:*:*:*:*:*:* Added CPE Configuration OR *cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:* Added CPE Configuration OR *cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*
Vulnerability Scoring Details
Base CVSS Score: 3.3
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.17 }} -0.00%
score
0.39109
percentile