CVE-2014-7975
5.5 Medium
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5 Medium
AI Score
Confidence
High
4.9 Medium
CVSS2
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
AV:L/AC:L/Au:N/C:N/I:N/A:C
0.0004 Low
EPSS
Percentile
9.3%
The do_umount function in fs/namespace.c in the Linux kernel through 3.17 does not require the CAP_SYS_ADMIN capability for do_remount_sb calls that change the root filesystem to read-only, which allows local users to cause a denial of service (loss of writability) by making certain unshare system calls, clearing the / MNT_LOCKED flag, and making an MNT_FORCE umount system call.
References
git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=0ef3a56b1c466629cd0bf482b09c7b0e5a085bb5
secunia.com/advisories/60174
secunia.com/advisories/61145
secunia.com/advisories/62633
secunia.com/advisories/62634
thread.gmane.org/gmane.linux.kernel.stable/109312
www.openwall.com/lists/oss-security/2014/10/08/22
www.securityfocus.com/bid/70314
www.securitytracker.com/id/1031180
www.ubuntu.com/usn/USN-2415-1
www.ubuntu.com/usn/USN-2416-1
www.ubuntu.com/usn/USN-2417-1
www.ubuntu.com/usn/USN-2418-1
www.ubuntu.com/usn/USN-2419-1
www.ubuntu.com/usn/USN-2420-1
www.ubuntu.com/usn/USN-2421-1
access.redhat.com/errata/RHSA-2017:1842
access.redhat.com/errata/RHSA-2017:2077
bugzilla.redhat.com/show_bug.cgi?id=1151108
exchange.xforce.ibmcloud.com/vulnerabilities/96994
Related
5.5 Medium
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5 Medium
AI Score
Confidence
High
4.9 Medium
CVSS2
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
AV:L/AC:L/Au:N/C:N/I:N/A:C
0.0004 Low
EPSS
Percentile
9.3%