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GitHub_MCVE-2021-32760

HistoryJul 19, 2021 - 9:15 p.m.

CVE-2021-32760

2021-07-1921:15:07

CWE-732

CWE-668

GitHub_M

web.nvd.nist.gov

270

cve-2021-32760

container runtime

containerd

security

bug

unix file permission

selinux

apparmor

nvd

CVSS2

6.8

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:N/AC:M/Au:N/C:P/I:P/A:P

CVSS3

6.3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

LOW

Integrity Impact

LOW

Availability Impact

LOW

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

AI Score

6.4

Confidence

High

EPSS

0.001

Percentile

50.9%

JSON

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.

Affected configurations

Nvd

Vulners

Node

linuxfoundationcontainerdRange<1.4.8

linuxfoundationcontainerdRange1.5.0–1.5.4

Node

fedoraprojectfedoraMatch34

VendorProductVersionCPE
linuxfoundationcontainerd*cpe:2.3:a:linuxfoundation:containerd:*:*:*:*:*:*:*:*
fedoraprojectfedora34cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*

Vendor	Product	Version	CPE
linuxfoundation	containerd	*	cpe:2.3:a:linuxfoundation:containerd::::::::
fedoraproject	fedora	34	cpe:2.3:o:fedoraproject:fedora:34:::::::*

CNA Affected

[
  {
    "vendor": "containerd",
    "product": "containerd",
    "versions": [
      {
        "version": "<= 1.4.7",
        "status": "affected"
      },
      {
        "version": ">= 1.5.0, <= 1.5.3",
        "status": "affected"
      }
    ]
  }
]