3.3

CVE-2021-4217: fedoraproject fedora NULL Pointer Dereference

CVSS: 3.3v3.1LowModified
AliasesALPINE-CVE-2021-4217UBUNTU-CVE-2021-4217USN-7054-1
Published 24-08-2022Last modified 03-08-2024
Open JSON

Vulnerability summary

CVE-2021-4217 is a low (CVSS 3.3) NULL Pointer Dereference vulnerability in fedoraproject fedora. EPSS estimates a 0.62% chance of exploitation in the next 30 days, higher than 48.9% of scored vulnerabilities. 2 public exploits are recorded.

Overall risk
23/100
0100
Low · default modelHow is this calculated?
CVSS score
3.3/10
010
Low · v3.1 (NVD)
EPSS score
0.62%
0%100%
Low · +0.01 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits2reference

Advisory lineage

Upstream 0 · Downstream 2 · Related 1
MGASA-2022-0371USN-5673-1

Timeline

  1. 24-08-2022
    PublishedVulnerability first disclosed.
  2. 03-08-2024
    Last modifiedVulnerability information updated.

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.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.62%

Chance of exploitation in the next 30 days

Percentile

49%

Versus all other CVEs

30-day change

+0.01 pp

From 0.62% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.62%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

2 found
  • referenceUnverified

    Exploit Reference (bugs.launchpad.net)

    Maturity: unknown

  • referenceUnverified

    Exploit Reference (bugzilla.redhat.com)

    Maturity: unknown

Weaknesses

CWE · root cause

Affected systems

Alpine1 product
  • unzip< 6.0-r11
Debian1 product
  • unzipAll versions (No fix recorded)
Fedoraproject1 product
Redhat1 product
Ubuntu1 product
  • unzip< 6.0-28ubuntu4.1 | < 6.0-9ubuntu1.6+esm1 | < 6.0-20ubuntu1.1+esm1 | < 6.0-21ubuntu1.2 | < 6.0-25ubuntu1.1 | < 6.0-26ubuntu3.1
Unzip_project1 product

6 vendors · 6 products

References

10 links