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CVE-2017-1000371

Status Candidate

Overview

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.

Related Files

Linux Kernel ldso_dynamic Stack Clash Privilege Escalation
Posted Jun 30, 2017
Site qualys.com

Linux kernel ldso_dynamic stack clash privilege escalation exploit. This affects Debian 9/10, Ubuntu 14.04.5/16.04.2/17.04, and Fedora 23/24/25.

tags | exploit, kernel
systems | linux, debian, fedora, ubuntu
advisories | CVE-2017-1000366, CVE-2017-1000371
MD5 | 26e7fd3397117950b21fa67eb23afc32
Linux Kernel offset2lib Stack Clash
Posted Jun 30, 2017
Site qualys.com

Linux kernel offset2lib stack clash exploit.

tags | exploit, kernel
systems | linux
advisories | CVE-2017-1000370, CVE-2017-1000371
MD5 | 9c45e4e7a5d321c745ee653fb91aba99
Qualys Security Advisory - The Stack Clash
Posted Jun 20, 2017
Site qualys.com

Qualys has released a large amount of research surrounding the use of stack clash vulnerabilities and how stack guard on Linux can be bypassed.

tags | advisory, vulnerability
systems | linux
advisories | CVE-2017-1000369, CVE-2017-1000376, CVE-2017-1000366, CVE-2017-1000370, CVE-2010-2240, CVE-2017-1000365, CVE-2017-1000372, CVE-2017-1000373, CVE-2017-1083, CVE-2017-1082, CVE-2016-3672, CVE-2017-1000371
MD5 | 91191a0fae00196fec218203d9999e82
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