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NVD / CVE Program· CNA GitHub_M

CVE-2021-32760: Archive package allows chmod of file outside of unpack target directory

Noroxi assessment

Priority: Monitor (action score 25/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 1.5% (FIRST EPSS); higher than 75.8% of all records.
  • Anyone who can reach it over the internet 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: containerd (Alpine:v3.13) 1.4.8-r0; containerd (Alpine:v3.14) 1.5.4-r0; containerd (Debian:12) 1.4.5~ds1-2.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to containerd (Alpine:v3.13) 1.4.8-r0; containerd (Alpine:v3.14) 1.5.4-r0; containerd (Debian:12) 1.4.5~ds1-2 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

containerd is a container runtime. A bug was found in containerd versions prior to 1.4.8 and 1.5.4 where pulling and extracting a specially-crafted container image can result in Unix file permission changes for existing files in the host’s filesystem. Changes to file permissions can deny access to the expected owner of the file, widen access to others, or set extended bits like setuid, setgid, and sticky. This bug does not directly allow files to be read, modified, or executed without an additional cooperating process. This bug has been fixed in containerd 1.5.4 and 1.4.8. As a workaround, ensure that users only pull images from trusted sources. Linux security modules (LSMs) like SELinux and AppArmor can limit the files potentially affected by this bug through policies and profiles that prevent containerd from interacting with specific files.

MediumCVSS 6.3 · v3.1—No exploit Fix available
Published
Jul 19, 2021
Updated
Jun 16, 2026
EPSS
1.5% · 75th percentile

Report tools

JSON

Action score

25

Monitor

Low priority for now.

CVSS
25 / 40 · 6.3 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 1.5%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
6.3
CNA · GitHub_M
5.0
1.3 point gap

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

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

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

Follow CVE-2021-32760

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
linuxfoundationcontainerd
fedoraprojectfedora

Using containerd? Add it to your stack and be the first to know about CVEs like this one. (Docker)

Watch new CVEs for containerd

When you'll hear from us

  • when a new CVE affecting this product is published
  • when a record in your stack enters KEV or gets exploit code

One daily email digest (06:00 UTC); connect a webhook for KEV listings and weaponized exploits instantly.

Your free account also gets you

Running WordPress? Scan your site free with WP Lens

  • Stack alerts: add the products and versions you run, get the new CVEs that affect them
  • Uptime monitoring: 1 site, instant email when it goes down
  • Add your domain: subdomains and takeover risk scanned every week (1 domain)
  • 10 scans an hour on the security tools (3 a day without an account), an API key and MCP
  • All your scans in one panel: findings, what changed in the last scan, a report per domain or per client (PDF, share link)
All free tools

Sign up with email · Have an account? Sign in

Free account, no card. Unfollow any time.

Don't want an account? Get "Exploited this week" by email every Monday

Affected versions

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

  • fedoraproject fedora34
  • linuxfoundation containerdbefore 1.4.8
  • linuxfoundation containerd1.5.0 and later · before 1.5.4

Versions reported by the vendor

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

  • containerd containerd

    • <= 1.4.7, >= 1.5.0, <= 1.5.3affected

Package-level exposure

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

EcosystemPackageAffected rangeFix
Alpine:v3.13containerdfrom 1.5.0 · before 1.4.8-r01.4.8-r0
Alpine:v3.14containerdfrom 1.5.0 · before 1.5.4-r01.5.4-r0
Debian:12containerdbefore 1.4.5~ds1-21.4.5~ds1-2
Gogithub.com/containerd/containerdfrom 1.5.0 · before 1.5.41.5.4
Gogithub.com/containerd/containerdbefore 1.4.81.4.8
openSUSE:Leap 15.2containerdbefore 1.4.4-lp152.2.9.11.4.4-lp152.2.9.1
openSUSE:Leap 15.2containerdbefore 1.4.11-lp152.2.12.11.4.11-lp152.2.12.1
openSUSE:Leap 15.2dockerbefore 20.10.9_ce-lp152.2.18.120.10.9_ce-lp152.2.18.1
openSUSE:Leap 15.2runcbefore 1.0.2-lp152.2.9.11.0.2-lp152.2.9.1
openSUSE:Leap 15.3containerdbefore 1.4.11-56.11.4.11-56.1
openSUSE:Leap 15.3containerdbefore 1.4.4-5.36.11.4.4-5.36.1
openSUSE:Leap 15.3dockerbefore 20.10.9_ce-156.120.10.9_ce-156.1
openSUSE:Leap 15.3docker-kubicbefore 20.10.9_ce-156.120.10.9_ce-156.1
openSUSE:Leap 15.3runcbefore 1.0.2-23.11.0.2-23.1
openSUSE:Tumbleweedcontainerdbefore 1.4.8-2.21.4.8-2.2
openSUSE:Tumbleweedtrivybefore 0.20.2-1.10.20.2-1.1
SUSE:Linux Enterprise Module for Containers 12containerdbefore 1.4.11-16.45.11.4.11-16.45.1
SUSE:Linux Enterprise Module for Containers 12containerdbefore 1.4.4-16.42.11.4.4-16.42.1
SUSE:Linux Enterprise Module for Containers 12dockerbefore 20.10.9_ce-98.72.120.10.9_ce-98.72.1
SUSE:Linux Enterprise Module for Containers 12runcbefore 1.0.2-16.14.11.0.2-16.14.1
SUSE:Linux Enterprise Module for Containers 15 SP2containerdbefore 1.4.4-5.36.11.4.4-5.36.1
SUSE:Linux Enterprise Module for Containers 15 SP2containerdbefore 1.4.11-56.11.4.11-56.1
SUSE:Linux Enterprise Module for Containers 15 SP2dockerbefore 20.10.9_ce-156.120.10.9_ce-156.1
SUSE:Linux Enterprise Module for Containers 15 SP2runcbefore 1.0.2-23.11.0.2-23.1

Same product

linuxfoundation: all records

Other highest-scoring records for the same primary product.

  • CVE-2022-23648Insecure handling of image volumes in containerd CRI plugin
    38Monitor
  • CVE-2026-53488containerd CRI plugin: — image-config `LABEL` flows to restart-monitor `binary://` logger: host-root command execution from an image pull
    37Monitor
  • CVE-2021-43816Improper Preservation of Permissions in containerd
    37Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2020-15257Nov 30, 2020 · containerd-shim API Exposed to Host Network Containers
    21Monitor
  • ← EarlierCVE-2021-21334Mar 10, 2021 · environment variable leak
    26Monitor
  • Later →CVE-2021-41103Oct 4, 2021 · Insufficiently restricted permissions on plugin directories
    31Monitor

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:containerd1.4.8-r0 · Alpine:v3.13Package registry (OSV)
debian:containerd1.4.5~ds1-2 · Debian:12Package registry (OSV)
Go:github.com/containerd/containerd1.4.8Package registry (OSV)
Go:github.com/containerd/containerd1.5.4Package registry (OSV)
opensuse:containerd1.4.4-lp152.2.9.1 · openSUSE:Leap 15.2Package registry (OSV)
opensuse:docker20.10.9_ce-lp152.2.18.1 · openSUSE:Leap 15.2Package registry (OSV)
opensuse:docker-kubic20.10.9_ce-156.1 · openSUSE:Leap 15.3Package registry (OSV)
opensuse:runc1.0.2-lp152.2.9.1 · openSUSE:Leap 15.2Package registry (OSV)
opensuse:trivy0.20.2-1.1 · openSUSE:TumbleweedPackage registry (OSV)
suse:containerd1.4.4-5.36.1 · SUSE:Linux Enterprise Module for Containers 15 SP2Package registry (OSV)
suse:docker20.10.9_ce-98.72.1 · SUSE:Linux Enterprise Module for Containers 12Package registry (OSV)
suse:runc1.0.2-16.14.1 · SUSE:Linux Enterprise Module for Containers 12Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

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.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

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).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

Technical details

Attack conditions

  • Anyone who can reach it over the internet 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
low · data can be read
Integrity
low · data or configuration can be modified
Availability
low · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
Required
Scope
Unchanged
Confidentiality impact
Low
Integrity impact
Low
Availability impact
Low

Weakness class (CWE)

CWE-668 · Exposure of Resource to Wrong Sphere

CVSS vector

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

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. Fix✗ → ✓

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

References

Show all references (4 more)

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

All records