CVE-2017-1000371

 

Published at: - 19-06-2017 06:29

Last modified: - 17-01-2023 10:03

Total changes: - 2

Description

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.

Common Vulnerability Scoring System (CVSS)

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

 

Verification logic

 

Reference

• https://www.qualys.com/2017/06/19/stack-clash/stack-clash.txt
• https://access.redhat.com/security/cve/CVE-2017-1000371
• 99131-Third Party Advisory, VDB Entry
• 42276-Third Party Advisory, VDB Entry
• 42273-Third Party Advisory, VDB Entry
• DSA-3981-Third Party Advisory

 

Keywords

NVD

 

CVE-2017-1000371

 

CVE

 

Common vulnerabilities & exposures

 

CVSS

 

Common vulnerability scoring system

 

Security

 

Vulnerabilities

 

Exposures