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CVE

CVE-2021-4217

A flaw was found in unzip. The vulnerability occurs due to improper handling of Unicode strings, which can lead to a nul

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.

LOW · CVSS 3.3 EPSS 0.00195
Schedule remediation
  • Public exploit or PoC is available
Sigma rules1 YARA rules0
⬡

Weakness Classification

CWE-476NULL Pointer Dereference
CWE-476NULL Pointer Dereference
▤

Affected Products & Versions

3
unzip project unzipall versions
fedoraproject fedoraall versions
redhat enterprise linuxall versions
⚠

Public Exploits & PoCs

2
pocbugs.launchpad.net · 1957077bugs.launchpad.net
pocbugzilla.redhat.com · show_bug.cgi?id=2044583bugzilla.redhat.com
◈

Sigma Hunt Rules

1
Exact rules name this CVE ID. Product rules name an affected product in their title. Related rules cover techniques used by actors who exploited this CVE. Showing the most relevant matches; the complete related set is on the full drill-down.
productlowSteganography Unzip Hidden Information From Picture File
▣

Scoring & Timeline

3.3
LOW · CVSS v3.1 · secalert@redhat.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD24 Aug 2022 · 04:15 PM
CVSS VectorCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
⚑

Vendor Advisories

3
msrcCVE-2021-4217
usnUSN-7054-1
usnUSN-5673-1
🔗

References & Sources

1
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://access.redhat.com/security/cve/CVE-2021-4217Third Party Advisory
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