Vulnerability CVE-2012-0055

Vulnerability Name:

CVE-2012-0055 (CCN-72444)

Assigned:

2011-12-07

Published:

2012-01-13

Updated:

2020-02-28

Summary:

OverlayFS in the Linux kernel before 3.0.0-16.28, as used in Ubuntu 10.0.4 LTS and 11.10, is missing inode security checks which could allow attackers to bypass security restrictions and perform unauthorized actions.

CVSS v3 Severity:

7.8 High (CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)

Exploitability Metrics:	Attack Vector (AV): Local Attack Complexity (AC): Low Privileges Required (PR): Low User Interaction (UI): None
Scope:	Scope (S): Unchanged
Impact Metrics:	Confidentiality (C): High Integrity (I): High Availibility (A): High

4.0 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N)

Exploitability Metrics:	Attack Vector (AV): Local Attack Complexity (AC): Low Privileges Required (PR): None User Interaction (UI): None
Scope:	Scope (S): Unchanged
Impact Metrics:	Confidentiality (C): None Integrity (I): Low Availibility (A): None

CVSS v2 Severity:

7.2 High (CVSS v2 Vector: AV:L/AC:L/Au:N/C:C/I:C/A:C)
5.3 Medium (Temporal CVSS v2 Vector: AV:L/AC:L/Au:N/C:C/I:C/A:C/E:U/RL:OF/RC:C)

Exploitability Metrics:	Access Vector (AV): Local Access Complexity (AC): Low Authentication (Au): None
Impact Metrics:	Confidentiality (C): Complete Integrity (I): Complete Availibility (A): Complete

2.1 Low (CCN CVSS v2 Vector: AV:L/AC:L/Au:N/C:N/I:P/A:N)
1.6 Low (CCN Temporal CVSS v2 Vector: AV:L/AC:L/Au:N/C:N/I:P/A:N/E:U/RL:OF/RC:C)

Exploitability Metrics:	Access Vector (AV): Local Access Complexity (AC): Low Athentication (Au): None
Impact Metrics:	Confidentiality (C): None Integrity (I): Partial Availibility (A): None

Vulnerability Type:

CWE-862

Vulnerability Consequences:

Bypass Security

References:

Source: MITRE
Type: CNA
CVE-2012-0055

Source: CCN
Type: OverlayFS Web site
OverlayFS

Source: MLIST
Type: Exploit, Mailing List, Patch, Third Party Advisory
[oss-security] 20120117 Re: CVE Request: overlayfs

Source: CCN
Type: OSVDB ID: 79247
Linux Kernel Overlayfs filesystem Extended Permission Weakness Local File Disclosure

Source: CCN
Type: BID-51529
OverlayFS inode Security Checks 'inode.c' Local Security Bypass Vulnerability

Source: CONFIRM
Type: Third Party Advisory
http://www.ubuntu.com/usn/USN-1363-1

Source: CONFIRM
Type: Third Party Advisory
http://www.ubuntu.com/usn/USN-1364-1

Source: CONFIRM
Type: Third Party Advisory
http://www.ubuntu.com/usn/USN-1384-1

Source: MISC
Type: Third Party Advisory
https://access.redhat.com/security/cve/cve-2012-0055

Source: CCN
Type: Ubuntu Bug #918212
CVE-2012-0055

Source: CONFIRM
Type: Exploit, Third Party Advisory
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/915941

Source: MISC
Type: Issue Tracking, Third Party Advisory
https://bugzilla.suse.com/show_bug.cgi?id=CVE-2012-0055

Source: XF
Type: UNKNOWN
overlayfs-inode-security-bypass(72444)

Vulnerable Configuration:

Configuration 1:

cpe:/o:linux:linux_kernel:*:*:*:*:*:*:*:* (Version < 3.0.0)

Configuration 2:

cpe:/o:canonical:ubuntu_linux:10.04:*:*:*:lts:*:*:*

OR cpe:/o:canonical:ubuntu_linux:11.10:*:*:*:*:*:*:*

Denotes that component is vulnerable

Oval Definitions

Definition ID	Class	Title	Last Modified
oval:org.mitre.oval:def:15162	P	USN-1364-1 -- Linux kernel (OMAP4) vulnerabilities	2014-06-30
oval:org.mitre.oval:def:15445	P	USN-1384-1 -- Linux kernel (Oneiric backport) vulnerabilities	2014-06-30
oval:org.mitre.oval:def:14884	P	USN-1363-1 -- Linux kernel vulnerabilities	2014-06-30
oval:com.ubuntu.precise:def:20120055000	V	CVE-2012-0055 on Ubuntu 12.04 LTS (precise) - medium.	2012-01-18
oval:com.ubuntu.trusty:def:20120055000	V	CVE-2012-0055 on Ubuntu 14.04 LTS (trusty) - medium.	2012-01-18
oval:com.ubuntu.xenial:def:20120055000	V	CVE-2012-0055 on Ubuntu 16.04 LTS (xenial) - medium.	2012-01-18
oval:com.ubuntu.xenial:def:201200550000000	V	CVE-2012-0055 on Ubuntu 16.04 LTS (xenial) - medium.	2012-01-18

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