High severity · published May 27, 2021
CVE-2021-30465
runc before 1.0.0-rc95 allows a Container Filesystem Breakout via Directory Traversal
8.5
CVSS
10.2%
EPSS
No
On KEV
Description
runc before 1.0.0-rc95 allows a Container Filesystem Breakout via Directory Traversal. To exploit the vulnerability, an attacker must be able to create multiple containers with a fairly specific mount configuration. The problem occurs via a symlink-exchange attack that relies on a race condition.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
Attack vector
Network
Complexity
High
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)10.2% · higher than 96% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FE
Fedora · Fedoraproject
33; 34 · source: NVD
RU
Runc · Linuxfoundation
through 0.1.1; 1.0.0; 1.0.0; 1.0.0; 1.0.0; 1.0.0; +10 more · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-30465
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-30465
Mailing List
http://www.openwall.com/lists/oss-security/2021/05/19/2
Issue Tracking
https://bugzilla.opensuse.org/show_bug.cgi?id=1185405
Patch
https://github.com/opencontainers/runc/commit/0ca91f44f1664da834bc61115a849b56d22f595f
Release Notes
https://github.com/opencontainers/runc/releases
Patch
https://github.com/opencontainers/runc/security/advisories/GHSA-c3xm-pvg7-gh7r
lists.debian.org
https://lists.debian.org/debian-lts-announce/2023/03/msg00023.html
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