CVE-2014-5206

The do_remount function in fs/namespace.c in the Linux kernel through 3.16.1 does not maintain the MNT_LOCK_READONLY bit across a remount of a bind mount, which allows local users to bypass an intended read-only restriction and defeat certain sandbox protection mechanisms via a "mount -o remount" command within a user namespace.

CVSS v2.0 7.2 HIGH

7.2^/10

CVSS v2.0 : HIGH

Vector : AV:L/AC:L/Au:N/C:C/I:C/A:C

Exploitability : 3.9 / Impact : 10.0

Access Vector LOCAL

Access Complexity LOW

Authentication NONE

Confidentiality Impact COMPLETE

Integrity Impact COMPLETE

Availability Impact COMPLETE

References

Link	Resource
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=a6138db815df5ee542d848318e5dae681590fccd	Patch Vendor Advisory
https://github.com/torvalds/linux/commit/a6138db815df5ee542d848318e5dae681590fccd	Patch Third Party Advisory
http://www.openwall.com/lists/oss-security/2014/08/13/4	Mailing List Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1129662	Issue Tracking Patch Third Party Advisory
http://www.ubuntu.com/usn/USN-2317-1	Third Party Advisory
http://www.ubuntu.com/usn/USN-2318-1	Third Party Advisory
http://www.securityfocus.com/bid/69214	Third Party Advisory VDB Entry

Advertisement

Configurations

Configuration 1 (hide)

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

Configuration 2 (hide)

OR	cpe:2.3:o:canonical:ubuntu_linux:12.04::::esm:::
	cpe:2.3:o:canonical:ubuntu_linux:14.04::::esm:::

Information

Published : 2014-08-18 04:15

Updated : 2020-08-14 11:13

NVD link : CVE-2014-5206

Mitre link : CVE-2014-5206

JSON object : View

CWE

CWE-269

Improper Privilege Management

Advertisement

Products Affected

canonical

ubuntu_linux

linux

linux_kernel

{"cve": {"data_type": "CVE", "references": {"reference_data": [{"url": "http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=a6138db815df5ee542d848318e5dae681590fccd", "name": "http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=a6138db815df5ee542d848318e5dae681590fccd", "tags": ["Patch", "Vendor Advisory"], "refsource": "CONFIRM"}, {"url": "https://github.com/torvalds/linux/commit/a6138db815df5ee542d848318e5dae681590fccd", "name": "https://github.com/torvalds/linux/commit/a6138db815df5ee542d848318e5dae681590fccd", "tags": ["Patch", "Third Party Advisory"], "refsource": "CONFIRM"}, {"url": "http://www.openwall.com/lists/oss-security/2014/08/13/4", "name": "[oss-security] 20140813 Re: CVE Request: ro bind mount bypass using user namespaces", "tags": ["Mailing List", "Third Party Advisory"], "refsource": "MLIST"}, {"url": "https://bugzilla.redhat.com/show_bug.cgi?id=1129662", "name": "https://bugzilla.redhat.com/show_bug.cgi?id=1129662", "tags": ["Issue Tracking", "Patch", "Third Party Advisory"], "refsource": "CONFIRM"}, {"url": "http://www.ubuntu.com/usn/USN-2317-1", "name": "USN-2317-1", "tags": ["Third Party Advisory"], "refsource": "UBUNTU"}, {"url": "http://www.ubuntu.com/usn/USN-2318-1", "name": "USN-2318-1", "tags": ["Third Party Advisory"], "refsource": "UBUNTU"}, {"url": "http://www.securityfocus.com/bid/69214", "name": "69214", "tags": ["Third Party Advisory", "VDB Entry"], "refsource": "BID"}]}, "data_format": "MITRE", "description": {"description_data": [{"lang": "en", "value": "The do_remount function in fs/namespace.c in the Linux kernel through 3.16.1 does not maintain the MNT_LOCK_READONLY bit across a remount of a bind mount, which allows local users to bypass an intended read-only restriction and defeat certain sandbox protection mechanisms via a \"mount -o remount\" command within a user namespace."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "en", "value": "CWE-269"}]}]}, "data_version": "4.0", "CVE_data_meta": {"ID": "CVE-2014-5206", "ASSIGNER": "cve@mitre.org"}}, "impact": {"baseMetricV2": {"cvssV2": {"version": "2.0", "baseScore": 7.2, "accessVector": "LOCAL", "vectorString": "AV:L/AC:L/Au:N/C:C/I:C/A:C", "authentication": "NONE", "integrityImpact": "COMPLETE", "accessComplexity": "LOW", "availabilityImpact": "COMPLETE", "confidentialityImpact": "COMPLETE"}, "severity": "HIGH", "acInsufInfo": false, "impactScore": 10.0, "obtainAllPrivilege": false, "exploitabilityScore": 3.9, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}}, "publishedDate": "2014-08-18T11:15Z", "configurations": {"nodes": [{"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndIncluding": "3.16.1"}]}, {"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:esm:*:*:*", "cpe_name": [], "vulnerable": true}, {"cpe23Uri": "cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:*", "cpe_name": [], "vulnerable": true}]}], "CVE_data_version": "4.0"}, "lastModifiedDate": "2020-08-14T18:13Z"}