Vulnerability Details : CVE-2017-16995

Public exploit exists!
The check_alu_op function in kernel/bpf/verifier.c in the Linux kernel through 4.4 allows local users to cause a denial of service (memory corruption) or possibly have unspecified other impact by leveraging incorrect sign extension.
Published 2017-12-27 17:08:18
Updated 2023-01-19 15:48:42
Source Debian GNU/Linux
View at NVD,   CVE.org
Vulnerability category: OverflowMemory CorruptionDenial of service

Products affected by CVE-2017-16995

Exploit prediction scoring system (EPSS) score for CVE-2017-16995

EPSS FAQ
83.02%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 99 %
Percentile, the proportion of vulnerabilities that are scored at or less

Metasploit modules for CVE-2017-16995

  • Linux BPF Sign Extension Local Privilege Escalation
    Disclosure Date: 2017-11-12
    First seen: 2020-04-26
    exploit/linux/local/bpf_sign_extension_priv_esc
    Linux kernel prior to 4.14.8 contains a vulnerability in the Berkeley Packet Filter (BPF) verifier. The `check_alu_op` function performs incorrect sign extension which allows the verifier to be bypassed, leading to arbitrary kernel read/write. The

CVSS scores for CVE-2017-16995

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
7.2
 HIGH AV:L/AC:L/Au:N/C:C/I:C/A:C
3.9
10.0
 NIST
7.8
 HIGH CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
1.8
5.9
 NIST

CWE ids for CVE-2017-16995

  • The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.
    Assigned by: nvd@nist.gov (Primary)

References for CVE-2017-16995

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