CVE-2017-8797
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (8.67%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 8.67% probability · 95th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-129
- Affected
- linux/linux kernel
- Source
- cve@mitre.org
References
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=b550a32e60a4941994b437a8d662432a486235a5Patch, Vendor Advisory
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=f961e3f2acae94b727380c0b74e2d3954d0edf79Patch, Vendor Advisory
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.11.3Release Notes, Vendor Advisory
- http://www.openwall.com/lists/oss-security/2017/06/27/5Mailing List, Patch, VDB Entry
- http://www.securityfocus.com/bid/99298Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1038790Broken Link, Third Party Advisory, VDB 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 Tracking, Third Party Advisory, VDB Entry
- https://github.com/torvalds/linux/commit/b550a32e60a4941994b437a8d662432a486235a5Patch, Third Party Advisory
- https://github.com/torvalds/linux/commit/f961e3f2acae94b727380c0b74e2d3954d0edf79Patch, Third Party Advisory
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=b550a32e60a4941994b437a8d662432a486235a5Patch, Vendor Advisory
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=f961e3f2acae94b727380c0b74e2d3954d0edf79Patch, Vendor Advisory
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.11.3Release Notes, Vendor Advisory
- http://www.openwall.com/lists/oss-security/2017/06/27/5Mailing List, Patch, VDB Entry
- http://www.securityfocus.com/bid/99298Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1038790Broken Link, Third Party Advisory, VDB 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 Tracking, Third Party Advisory, VDB Entry
- https://github.com/torvalds/linux/commit/b550a32e60a4941994b437a8d662432a486235a5Patch, Third Party Advisory
- https://github.com/torvalds/linux/commit/f961e3f2acae94b727380c0b74e2d3954d0edf79Patch, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.