CVE-2017-8797

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.

Weakness classification

• CWE-129: Improper Validation of Array Index

Primary references

• cve@mitre.org — Patch, Vendor Advisory
• cve@mitre.org — Patch, Vendor Advisory
• cve@mitre.org — Release Notes, Vendor Advisory
• cve@mitre.org — Mailing List, Patch, VDB Entry
• cve@mitre.org — Third Party Advisory, VDB Entry
• cve@mitre.org — Broken Link, Third Party Advisory, VDB Entry
• cve@mitre.org — Third Party Advisory
• cve@mitre.org — Third Party Advisory
• cve@mitre.org — Third Party Advisory
• cve@mitre.org — Third Party Advisory
• cve@mitre.org — Issue Tracking, Third Party Advisory, VDB Entry
• cve@mitre.org — Patch, Third Party Advisory