CVE-2015-4177

The collect_mounts function in fs/namespace.c in the Linux kernel before 4.0.5 does not properly consider that it may execute after a path has been unmounted, which allows local users to cause a denial of service (system crash) by leveraging user-namespace root access for an MNT_DETACH umount2 system call.

CVSS v3 5.5 MEDIUM
CVSS v2.0 4.9 MEDIUM

5.5^/10

CVSS v3 : MEDIUM

Vector : AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

4.9^/10

CVSS v2.0 : MEDIUM

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

Exploitability : 3.9 / Impact : 6.9

Access Vector LOCAL

Access Complexity LOW

Authentication NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact COMPLETE

References

Link	Resource
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=cd4a40174b71acd021877341684d8bb1dc8ea4ae	Vendor Advisory
http://openwall.com/lists/oss-security/2015/05/29/10
http://openwall.com/lists/oss-security/2015/05/29/5
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.0.5
http://www.openwall.com/lists/oss-security/2015/06/04/5
https://bugzilla.redhat.com/show_bug.cgi?id=1248486
https://github.com/torvalds/linux/commit/cd4a40174b71acd021877341684d8bb1dc8ea4ae	Vendor Advisory

Configurations

Configuration 1 (hide)

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

History

No history.

Information

Published : 2016-05-02 10:59

Updated : 2016-05-06 16:44

NVD link : CVE-2015-4177

Mitre link : CVE-2015-4177

CVE.ORG link : CVE-2015-4177

JSON object : View

Products Affected

linux

linux_kernel

CWE

NVD-CWE-Other

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