CVE Tools
Sign in

CVE-2021-32760

Archive package allows chmod of file outside of unpack target directory

Published: Jul 19, 2021Updated: Nov 21, 2024 Sources: CVE List NVD GHSA BDUCWE-668
NVD MITRE
5.0CVSSMEDIUM
EPSS Score
1.6%
Top 27.2%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

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.

CVSS Vector Breakdown

AV:NAC:HPR:NUI:RS:UC:LI:LA:L
Exploitability
AV:NAttack Vector
Network
AC:HAttack Complexity
High
PR:NPrivileges Required
None
UI:RUser Interaction
Required
Scope
S:UScope
Unchanged
Impact
C:LConfidentiality
Low
I:LIntegrity
Low
A:LAvailability
Low
Open in CVSS calculator →

Weaknesses

CWE-668CWE-732

Affected Products

containerdcontainerd
On-prem
Cloud & SaaS / container-orchestration
containerdlinuxfoundation
LibraryLibrary
AI / ML
fedorafedoraproject
On-premOS
Operating Systems / linux-distro
github.com/containerd/containerdGoOSS Libraries
ContainerdCloud Native Computing Foundation
Mixed
Cloud & SaaS / container-orchestration
containerdoss-projectCloud & SaaSaka containerd, imgcrypt
linuxfoundationoss-projectUSAI / MLaka yocto, pytorch, everest
fedoraprojectoss-projectUSOperating Systemsaka fedora project
gopackage-ecosystemOSS Libraries
cloud native computing foundationoss-projectUSCloud & SaaSaka cncf
and 3 more affected products View all →

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

Official Patch Available

MITRE ATT&CK

1 technique
Privilege Escalation
View detailed technique mapping

References

https://github.com/containerd/containerd/security/advisories/GHSA-c72p-9xmj-rx3w
github.com
https://github.com/containerd/containerd/releases/tag/v1.4.8
github.com
https://github.com/containerd/containerd/releases/tag/v1.5.4
github.com
and 18 more references View all →

Timeline

Published
Jul 19, 2021
Last Updated
Nov 21, 2024

Unlock Complete Vulnerability Intelligence

Get the full picture for CVE-2021-32760 and every CVE in our database. Create a free account — no credit card required.

Create Free Account
Plain-language analysis
Impact assessment and exploitation scenario in plain English
Attack graph visualization
Interactive attack path and kill chain mapping
Exploit details & PoC links
ExploitDB, Metasploit, GitHub PoCs with direct links
Nuclei scanner templates
Ready-to-use vulnerability scanner templates
Full remediation guide
Patch instructions, workarounds, and compliance impact
Interactive AI chat
Ask questions about this vulnerability in natural language
Related vulnerabilities
Semantically similar CVEs and attack patterns
REST API & MCP access
Integrate vulnerability data into your workflows