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GitHub Advisory DatabaseGHSA-G2J6-57V7-GM8CHistoryMar 30, 2023 - 8:20 p.m.
runc AppArmor bypass with symlinked /proc
2023-03-3020:20:23
CWE-59
CWE-281
GitHub Advisory Database
github.com
257
apparmor
selinux
symlink
/proc
container
image
security
patch
vulnerability
7.8 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
0.001 Low
EPSS
Percentile
19.2%
Impact
It was found that AppArmor, and potentially SELinux, can be bypassed when /proc inside the container is symlinked with a specific mount configuration.
Patches
Fixed in runc v1.1.5, by prohibiting symlinked /proc: https://github.com/opencontainers/runc/pull/3785
This PR fixes CVE-2023-27561 as well.
Workarounds
Avoid using an untrusted container image.
Affected configurations
Node
opencontainersruncRange<1.1.5
| CPE | Name | Operator | Version |
|---|---|---|---|
| github.com/opencontainers/runc | lt | 1.1.5 |
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7.8 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
0.001 Low
EPSS
Percentile
19.2%
Related for GHSA-G2J6-57V7-GM8C