Vulnerability Name:

CVE-2016-6522 (CCN-125133)

Assigned:2016-08-02
Published:2016-08-02
Updated:2017-03-09
Summary:Integer overflow in the uvm_map_isavail function in uvm/uvm_map.c in OpenBSD 5.9 allows local users to cause a denial of service (kernel panic) via a crafted mmap call, which triggers the new mapping to overlap with an existing mapping.
CVSS v3 Severity:5.5 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
4.8 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): High
6.2 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
5.4 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): High
CVSS v2 Severity:4.9 Medium (CVSS v2 Vector: AV:L/AC:L/Au:N/C:N/I:N/A:C)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Low
Authentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Complete
4.9 Medium (CCN CVSS v2 Vector: AV:L/AC:L/Au:N/C:N/I:N/A:C)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Complete
Vulnerability Type:CWE-190
Vulnerability Consequences:Denial of Service
References:Source: MITRE
Type: CNA
CVE-2016-6522

Source: CCN
Type: OpenBSD Web site
Missing overflow checks in uvm may result in panics

Source: CONFIRM
Type: Patch
http://ftp.openbsd.org/pub/OpenBSD/patches/5.9/common/023_uvmisavail.patch.sig

Source: CCN
Type: oss-sec Mailing List, Tue, 2 Aug 2016 19:48:18 -0400 (EDT)
Re: CVE Request: Denial-of-Service / Unexploitable Memory Corruption in mmap() on OpenBSD

Source: MLIST
Type: Exploit, Mailing List, Third Party Advisory
[oss-security] 20160802 Re: CVE Request: Denial-of-Service / Unexploitable Memory Corruption in mmap() on OpenBSD

Source: MLIST
Type: Exploit, Mailing List, Third Party Advisory
[oss-security] 20160802 CVE Request: Denial-of-Service / Unexploitable Memory Corruption in mmap() on OpenBSD

Source: BID
Type: UNKNOWN
92264

Source: CCN
Type: BID-92264
OpenBSD CVE-2016-6522 Integer Overflow Vulnerability

Source: XF
Type: UNKNOWN
openbsd-cve20166522-dos(125133)

Vulnerable Configuration:Configuration 1:
  • cpe:/o:openbsd:openbsd:5.9:*:*:*:*:*:*:*

    • Configuration CCN 1:
  • cpe:/o:openbsd:openbsd:5.9:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    BACK
    openbsd openbsd 5.9
    openbsd openbsd 5.9