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Vulnerability Details : CVE-2017-1000371

The offset2lib patch as used by the Linux Kernel contains a vulnerability, if RLIMIT_STACK is set to RLIM_INFINITY and 1 Gigabyte of memory is allocated (the maximum under the 1/4 restriction) then the stack will be grown down to 0x80000000, and as the PIE binary is mapped above 0x80000000 the minimum distance between the end of the PIE binary's read-write segment and the start of the stack becomes small enough that the stack guard page can be jumped over by an attacker. This affects Linux Kernel version 4.11.5. This is a different issue than CVE-2017-1000370 and CVE-2017-1000365. This issue appears to be limited to i386 based systems.
Publish Date : 2017-06-19 Last Update Date : 2017-08-11
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- CVSS Scores & Vulnerability Types

CVSS Score
7.2
Confidentiality Impact Complete (There is total information disclosure, resulting in all system files being revealed.)
Integrity Impact Complete (There is a total compromise of system integrity. There is a complete loss of system protection, resulting in the entire system being compromised.)
Availability Impact Complete (There is a total shutdown of the affected resource. The attacker can render the resource completely unavailable.)
Access Complexity Low (Specialized access conditions or extenuating circumstances do not exist. Very little knowledge or skill is required to exploit. )
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s)
CWE ID 264

- Products Affected By CVE-2017-1000371

# Product Type Vendor Product Version Update Edition Language
1 OS Linux Linux Kernel 4.11.5 Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Linux Linux Kernel 1

- References For CVE-2017-1000371

https://www.qualys.com/2017/06/19/stack-clash/stack-clash.txt
http://www.securityfocus.com/bid/99131
BID 99131 Linux Kernel CVE-2017-1000371 Local Security Bypass Vulnerability Release Date:2017-09-25
https://www.exploit-db.com/exploits/42276/
EXPLOIT-DB 42276
https://www.exploit-db.com/exploits/42273/
EXPLOIT-DB 42273
https://access.redhat.com/security/cve/CVE-2017-1000371 CONFIRM

- Metasploit Modules Related To CVE-2017-1000371

There are not any metasploit modules related to this CVE entry (Please visit www.metasploit.com for more information)


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