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CVE
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CVE-2017-8797

Date: (C)2017-07-04   (M)2018-01-05 


The NFSv4 server in the Linux kernel before 4.11.3 does not properly validate the layout type when processing the NFSv4 pNFS GETDEVICEINFO or LAYOUTGET operand in a UDP packet from a remote attacker. This type value is uninitialized upon encountering certain error conditions. This value is used as an array index for dereferencing, which leads to an OOPS and eventually a DoS of knfsd and a soft-lockup of the whole system.

CVSS Score: 7.8Access Vector: NETWORK
Exploit Score: 10.0Access Complexity: LOW
Impact Score: 6.9Authentication: NONE
 Confidentiality: NONE
 Integrity: NONE
 Availability: COMPLETE





Reference:
SECTRACK-1038790
BID-99298
RHSA-2017:1842
RHSA-2017:2077
RHSA-2017:2437
RHSA-2017:2669
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=b550a32e60a4941994b437a8d662432a486235a5
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=f961e3f2acae94b727380c0b74e2d3954d0edf79
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.11.3
http://www.openwall.com/lists/oss-security/2017/06/27/5
https://bugzilla.redhat.com/show_bug.cgi?id=1466329
https://github.com/torvalds/linux/commit/b550a32e60a4941994b437a8d662432a486235a5
https://github.com/torvalds/linux/commit/f961e3f2acae94b727380c0b74e2d3954d0edf79

CWE    1
CWE-129
OVAL    2
oval:org.secpod.oval:def:502088
oval:org.secpod.oval:def:1502089

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