Vulnerability CVE-2017-1000372
Published: 2017-06-19

Description:
A flaw exists in OpenBSD's implementation of the stack guard page that allows attackers to bypass it resulting in arbitrary code execution using setuid binaries such as /usr/bin/at. This affects OpenBSD 6.1 and possibly earlier versions.

See advisories in our WLB2 database:
Topic
Author
Date
Med.
OpenBSD 'at' Local Root Stack Clash Exploit
Qualys
29.06.2017

Type:

CWE-noinfo

CVSS2 => (AV:N/AC:L/Au:N/C:P/I:P/A:P)

CVSS Base Score
Impact Subscore
Exploitability Subscore
7.5/10
6.4/10
10/10
Exploit range
Attack complexity
Authentication
Remote
Low
No required
Confidentiality impact
Integrity impact
Availability impact
Partial
Partial
Partial
Affected software
Openbsd -> Openbsd 

 References:
http://www.securityfocus.com/bid/99172
https://ftp.openbsd.org/pub/OpenBSD/patches/6.1/common/008_exec_subr.patch.sig
https://www.qualys.com/2017/06/19/stack-clash/stack-clash.txt
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