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7.5
CVSSv3

CVE-2017-8797

Published: 02/07/2017 Updated: 03/02/2023
CVSS v2 Base Score: 7.8 | Impact Score: 6.9 | Exploitability Score: 10
CVSS v3 Base Score: 7.5 | Impact Score: 3.6 | Exploitability Score: 3.9
VMScore: 694
Vector: AV:N/AC:L/Au:N/C:N/I:N/A:C
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Vulnerability Summary

The NFSv4 server in the Linux kernel prior to 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.

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Vendor Advisories

Red Hat: Important: kernel security, bug fix, and enhancement update
Synopsis Important: kernel security, bug fix, and enhancement update Type/Severity Security Advisory: Important Topic An update for kernel is now available for Red Hat Enterprise Linux 7Red Hat Product Security has rated this update as having a security impact of Important A Common Vulnerability Scoring S ...
Red Hat: CVE-2017-8797
It was found that the NFSv4 server in the Linux kernel did not properly validate layout type when processing NFSv4 pNFS LAYOUTGET and GETDEVICEINFO operands A remote attacker could use this flaw to soft-lockup the system and thus cause denial of service ...

References

CWE-129https://github.com/torvalds/linux/commit/f961e3f2acae94b727380c0b74e2d3954d0edf79https://github.com/torvalds/linux/commit/b550a32e60a4941994b437a8d662432a486235a5https://bugzilla.redhat.com/show_bug.cgi?id=1466329http://www.openwall.com/lists/oss-security/2017/06/27/5http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.11.3http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=f961e3f2acae94b727380c0b74e2d3954d0edf79http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=b550a32e60a4941994b437a8d662432a486235a5http://www.securityfocus.com/bid/99298http://www.securitytracker.com/id/1038790https://access.redhat.com/errata/RHSA-2017:2669https://access.redhat.com/errata/RHSA-2017:2437https://access.redhat.com/errata/RHSA-2017:2077https://access.redhat.com/errata/RHSA-2017:1842https://access.redhat.com/errata/RHSA-2017:1842https://nvd.nist.govhttps://access.redhat.com/security/cve/cve-2017-8797
CVSSv3
CVSSv2
CVSSv3
VMScore
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