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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 : 2017-11-05
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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) |
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CWE ID |
264 |
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Products Affected By CVE-2017-1000371
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Number Of Affected Versions By Product
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References For CVE-2017-1000371
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Metasploit Modules Related To CVE-2017-1000371
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