CVE-2021-30465

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.

Category

8.5
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 2.36% Top 20%
Vendor Advisory fedoraproject.org Vendor Advisory fedoraproject.org Vendor Advisory gentoo.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://github.com/opencontainers/runc/releases third party advisory release notes
http://www.openwall.com/lists/oss-security/2021/05/19/2 third party advisory mailing list
https://github.com/opencontainers/runc/security/advisories/GHSA-c3xm-pvg7-gh7r third party advisory patch
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4HOARVIT47RULTTFWAU7XBG4WY6TDDHV/ vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/35ZW6NBZSBH5PWIT7JU4HXOXGFVDCOHH/ vendor advisory
https://github.com/opencontainers/runc/commit/0ca91f44f1664da834bc61115a849b56d22f595f third party advisory patch
https://bugzilla.opensuse.org/show_bug.cgi?id=1185405 issue tracking
https://security.netapp.com/advisory/ntap-20210708-0003/ third party advisory
https://security.gentoo.org/glsa/202107-26 third party advisory vendor advisory
https://lists.debian.org/debian-lts-announce/2023/03/msg00023.html mailing list

Frequently Asked Questions

What is the severity of CVE-2021-30465?
CVE-2021-30465 has been scored as a high severity vulnerability.
How to fix CVE-2021-30465?
To fix CVE-2021-30465, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-30465 being actively exploited in the wild?
It is possible that CVE-2021-30465 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~2% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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