Ubuntu.comUB:CVE-2021-32760CVE-2021-32760
6.3 Medium
CVSS3
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
6.8 Medium
CVSS2
Access Vector
NETWORK
Access 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
0.001 Low
EPSS
Percentile
50.2%
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.
| OS | Version | Architecture | Package | Version | Filename |
|---|---|---|---|---|---|
| ubuntu | 18.04 | noarch | containerd | < 1.5.2-0ubuntu1~18.04.2 | UNKNOWN |
| ubuntu | 20.04 | noarch | containerd | < 1.5.2-0ubuntu1~20.04.2 | UNKNOWN |
| ubuntu | 20.10 | noarch | containerd | < 1.5.2-0ubuntu1~20.10.2 | UNKNOWN |
| ubuntu | 21.04 | noarch | containerd | < 1.5.2-0ubuntu1~21.04.2 | UNKNOWN |
| ubuntu | 21.10 | noarch | containerd | < 1.5.2-0ubuntu2 | UNKNOWN |
| ubuntu | 22.04 | noarch | containerd | < 1.5.2-0ubuntu2 | UNKNOWN |
| ubuntu | 16.04 | noarch | containerd | < 1.2.6-0ubuntu1~16.04.6+esm2 | UNKNOWN |
Related
6.3 Medium
CVSS3
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
6.8 Medium
CVSS2
Access Vector
NETWORK
Access 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
0.001 Low
EPSS
Percentile
50.2%