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CVE
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CVE-2014-7975Date: (C)2014-10-13   (M)2024-03-25


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.

CVSS Score and Metrics +CVSS Score and Metrics -

CVSS V3 Severity:CVSS V2 Severity:
CVSS Score : 5.5CVSS Score : 4.9
Exploit Score: 1.8Exploit Score: 3.9
Impact Score: 3.6Impact Score: 6.9
 
CVSS V3 Metrics:CVSS V2 Metrics:
Attack Vector: LOCALAccess Vector: LOCAL
Attack Complexity: LOWAccess Complexity: LOW
Privileges Required: LOWAuthentication: NONE
User Interaction: NONEConfidentiality: NONE
Scope: UNCHANGEDIntegrity: NONE
Confidentiality: NONEAvailability: COMPLETE
Integrity: NONE 
Availability: HIGH 
  
Reference:
SECTRACK-1031180
SECUNIA-60174
SECUNIA-61145
SECUNIA-62633
SECUNIA-62634
BID-70314
RHSA-2017:1842
RHSA-2017:2077
USN-2415-1
USN-2416-1
USN-2417-1
USN-2418-1
USN-2419-1
USN-2420-1
USN-2421-1
http://www.openwall.com/lists/oss-security/2014/10/08/22
http://thread.gmane.org/gmane.linux.kernel.stable/109312
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=0ef3a56b1c466629cd0bf482b09c7b0e5a085bb5
https://bugzilla.redhat.com/show_bug.cgi?id=1151108
linux-kernel-cve20147975-dos(96994)

CPE    3
cpe:/o:canonical:ubuntu_linux:12.04::~~esm~~~
cpe:/o:canonical:ubuntu_linux:14.10
cpe:/o:linux:linux_kernel
OVAL    31
oval:org.secpod.oval:def:505165
oval:org.secpod.oval:def:204616
oval:org.secpod.oval:def:502088
oval:org.secpod.oval:def:204584
...

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