Vulnerability Description
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
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 4.0, < 4.1.40 |
Related Weaknesses (CWE)
References
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=b550a3PatchVendor Advisory
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=f961e3PatchVendor Advisory
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.11.3Release NotesVendor Advisory
- http://www.openwall.com/lists/oss-security/2017/06/27/5Mailing ListPatchVDB Entry
- http://www.securityfocus.com/bid/99298Third Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1038790Broken LinkThird Party AdvisoryVDB Entry
- https://access.redhat.com/errata/RHSA-2017:1842Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:2077Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:2437Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:2669Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1466329Issue TrackingThird Party AdvisoryVDB Entry
- https://github.com/torvalds/linux/commit/b550a32e60a4941994b437a8d662432a486235aPatchThird Party Advisory
- https://github.com/torvalds/linux/commit/f961e3f2acae94b727380c0b74e2d3954d0edf7PatchThird Party Advisory
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=b550a3PatchVendor Advisory
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=f961e3PatchVendor Advisory
FAQ
What is CVE-2017-8797?
CVE-2017-8797 is a vulnerability with a CVSS score of 7.5 (HIGH). 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. ...
How severe is CVE-2017-8797?
CVE-2017-8797 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2017-8797?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.