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CVE-2017-8797

HIGHCVSS 7.5/10EPSS 8.67%

Last modified

CVE-2017-8797 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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. EPSS estimates a 8.67% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1
7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability
8.67%

94.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
LinuxLinux Kernel>= 4.0, < 4.1.40
LinuxLinux Kernel>= 4.2, < 4.4.70
LinuxLinux Kernel>= 4.5, < 4.9.30
LinuxLinux Kernel>= 4.11, < 4.11.3

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is 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. 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.
How severe is CVE-2017-8797?
CVE-2017-8797 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 8.67% probability of exploitation in the next 30 days.
How do I fix CVE-2017-8797?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2017-8797?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST