PT-2017-1729 · Openbsd · Openbsd

Jesse Hertz · Published 2017-03-07 · Updated 2017-09-01 · CVE-2016-6239

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions OpenBSD versions 5.8 through 5.9

Description The issue allows attackers to cause a denial of service, resulting in a kernel panic and crash, by exploiting the mmap extension MAP NOFAULT with a large size value. This is due to insufficient input validation in the mmap extension. The exploitation can be performed by a local attacker.

Recommendations For OpenBSD versions 5.8 and 5.9, consider restricting the use of the mmap extension MAP NOFAULT until a patch is available to prevent potential denial of service attacks. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

RCE

Weakness Enumeration

CWE-20

Related Identifiers

BDU:2017-00882

CVE-2016-6239

Affected Products

Openbsd

References · 9

• 🔥 http://openwall.com/lists/oss-security/2016/07/17/7 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2016-6239 · Security Note
• https://bdu.fstec.ru/vul/2017-00882 · Security Note
• https://osv.dev/vulnerability/CVE-2016-6239 · Vendor Advisory
• http://openbsd.org/errata58.html · Note
• http://openwall.com/lists/oss-security/2016/07/14/5 · Note
• http://securitytracker.com/id/1036318 · Note
• http://securityfocus.com/bid/91805 · Note
• http://openbsd.org/errata59.html · Note