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CVE-2022-0529· NVD / CVE Program· CNA redhat

A flaw was found in Unzip.

Noroxi assessment

Priority: Monitor (action score 23/100)

  • Public proof-of-concept code exists (GitHub); there is no record of exploitation in the wild.
  • Probability of exploitation in the next 30 days: 2.4% (FIRST EPSS); higher than 83.9% of all records.
  • Someone with local access to the system can trigger it. No account or password is required. A user must open a link or visit a page. No special conditions are required; it is repeatable.
  • Fixed version: unzip (Alpine:v3.17) 6.0-r11; unzip (Debian:10) 6.0-23+deb10u3; unzip (Debian:11) 6.0-26+deb11u1.

Low priority for now. Upgrade to unzip (Alpine:v3.17) 6.0-r11; unzip (Debian:10) 6.0-23+deb10u3; unzip (Debian:11) 6.0-26+deb11u1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

A flaw was found in Unzip. The vulnerability occurs during the conversion of a wide string to a local string that leads to a heap of out-of-bound write. This flaw allows an attacker to input a specially crafted zip file, leading to a crash or code execution.

MediumCVSS 5.5 · v3.1—Proof of concept Fix available
Published
Feb 9, 2022
Updated
Oct 8, 2026
EPSS
2.4% · 83th percentile

Report tools

JSON

Action score

23

Monitor

Low priority for now.

CVSS
22 / 40 · 5.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
1 / 30 · 2.4%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • Proof of concept exists, no weaponized module
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2022-0529

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
unzip projectunzip
redhatenterprise linux
fedoraprojectfedora
debiandebian linux

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • debian debian linux10.0
  • debian debian linux11.0
  • fedoraproject fedora35
  • redhat enterprise linux8.0
  • unzip project unzip6.0

Versions reported by the vendor

Affected version ranges reported by the assigning authority (redhat). Independent of NVD's CPE analysis and usually ahead of it.

  • n/a unzip

    • 6.0affected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Alpine:v3.17unzipbefore 6.0-r116.0-r11
Debian:10unzipbefore 6.0-23+deb10u36.0-23+deb10u3
Debian:11unzipbefore 6.0-26+deb11u16.0-26+deb11u1
Debian:12unzipbefore 6.0-276.0-27
openSUSE:Tumbleweedunzipbefore 6.00-40.16.00-40.1
SUSE:Linux Enterprise Module for Basesystem 15 SP3unzipbefore 6.00-150000.4.11.16.00-150000.4.11.1
SUSE:Linux Enterprise Module for Basesystem 15 SP3unzipbefore 6.00-150000.4.11.16.00-150000.4.11.1
SUSE:Linux Enterprise Server 12 SP5unzipbefore 6.00-33.16.16.00-33.16.1

Same product

unzip project: all records

Other highest-scoring records for the same primary product.

  • CVE-2018-1000035A heap-based buffer overflow exists in Info-Zip UnZip version <= 6.00 in the processing of password-protected archives that allows an attack
    40Plan
  • CVE-2020-36561Path traversal in github.com/yi-ge/unzip
    36Monitor
  • CVE-2014-8141Heap-based buffer overflow in the getZip64Data function in Info-ZIP UnZip 6.0 and earlier allows remote attackers to execute arbitrary code
    33Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2014-8139Jan 31, 2020 · Heap-based buffer overflow in the CRC32 verification in Info-ZIP UnZip 6.0 and earlier allows remote attackers to execute arbitrary code via
    33Monitor
  • ← EarlierCVE-2014-8140Jan 31, 2020 · Heap-based buffer overflow in the test_compr_eb function in Info-ZIP UnZip 6.0 and earlier allows remote attackers to execute arbitrary code
    33Monitor
  • Later →CVE-2022-0530Feb 9, 2022 · A flaw was found in Unzip.
    23Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
alpine:unzip6.0-r11 · Alpine:v3.17Package registry (OSV)
debian:unzip6.0-27 · Debian:12Package registry (OSV)
opensuse:unzip6.00-150000.4.11.1 · openSUSE:Leap 15.3Package registry (OSV)
suse:unzip6.00-150000.4.11.1 · SUSE:Linux Enterprise Module for Basesystem 15 SP3Package registry (OSV)
suse:unzip6.00-33.16.1 · SUSE:Linux Enterprise Server 12 SP5Package registry (OSV)

Exploit status

Proof of concept available

A public proof of concept or detection signature exists. Exploit knowledge is out there; don't delay patching.

Evidence

  • Proof-of-concept repository on GitHub ×2

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
SourceKindDate
Proof-of-concept repository on GitHubstars:22022-02-28
Proof-of-concept repository on GitHubstars:32022-02-28

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

  1. Published
  2. First PoC+18 d
  3. TodayOct 22, 2026+1715 d
EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • No account or password is required.
  • A user must open a link or visit a page.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
None
User interaction
Required
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

CWE-787 · Out-of-bounds Write

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. SSVC exploitation— → none
  2. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (3 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records