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CVE-2021-30465

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Date: May 27, 2021

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.

Language: Go

Severity Score

Related Resources (16)

https://security.netapp.com/advisory/ntap-20210708-0003/
https://people.canonical.com/~ubuntu-security/cve/CVE-2021-30465
https://github.com/opencontainers/runc/releases
https://security-tracker.debian.org/tracker/CVE-2021-30465
http://www.openwall.com/lists/oss-security/2021/05/19/2
https://bugzilla.opensuse.org/show_bug.cgi?id=1185405
https://github.com/opencontainers/runc/security/advisories/GHSA-c3xm-pvg7-gh7r
https://github.com/opencontainers/runc/commit/0ca91f44f1664da834bc61115a849b56d22f595f
https://lists.debian.org/debian-lts-announce/2023/03/msg00023.html
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4HOARVIT47RULTTFWAU7XBG4WY6TDDHV/
https://access.redhat.com/security/cve/CVE-2021-30465
https://nvd.nist.gov/vuln/detail/CVE-2021-30465
https://security.gentoo.org/glsa/202107-26
https://security.alpinelinux.org/vuln/CVE-2021-30465
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/35ZW6NBZSBH5PWIT7JU4HXOXGFVDCOHH/
https://www.mend.io/vulnerability-database/CVE-2021-30465

Severity Score

Weakness Type (CWE)

Path Traversal

CWE-22

Race Conditions

CWE-362

Top Fix

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): HIGH
Privileges Required (PR): LOW
User Interaction (UI): NONE
Scope (S): CHANGED
Confidentiality (C): HIGH
Integrity (I): HIGH
Availability (A): HIGH

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): MEDIUM
Authentication (AU): SINGLE
Confidentiality (C): PARTIAL
Integrity (I): PARTIAL
Availability (A): PARTIAL
Additional information:

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