CVE-2018-25020

Description

The BPF subsystem in the Linux kernel before 4.17 mishandles situations with a long jump over an instruction sequence where inner instructions require substantial expansions into multiple BPF instructions, leading to an overflow. This affects kernel/bpf/core.c and net/core/filter.c.

CVSS Metrics

• v3.1•HIGH•Score: 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
• v2.0•MEDIUM•Score: 4.6AV:L/AC:L/Au:N/C:P/I:P/A:P

EPSS Trends

Current EPSS score: 0.16%• Percentile: 37%

Techniques & Countermeasures

• CWE-120•Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

  The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer.

Affected Systems

• linux•linux_kernel

  < 4.17

• netapp•cloud_backup

  na

• netapp•h300e

  na

• netapp•h300s_firmware

  na

• netapp•h410c_firmware

  na

• netapp•h410s_firmware

  na

• netapp•h500e

  na

• netapp•h500s_firmware

  na

• netapp•h700e

  na

• netapp•h700s_firmware

  na

References (3)

• https://github.com/torvalds/linux/commit/050fad7c4534c13c8eb1d9c2ba66012e014773cb
• https://security.netapp.com/advisory/ntap-20211229-0005/
• http://packetstormsecurity.com/files/165477/Kernel-Live-Patch-Security-Notice-LSN-0083-1.html