Vulnerability CVE-2017-15037

Vulnerability Name:

CVE-2017-15037 (CCN-133033)

Assigned:

2017-09-29

Published:

2017-09-29

Updated:

2017-10-13

Summary:

In FreeBSD through 11.1, the smb_strdupin function in sys/netsmb/smb_subr.c has a race condition with a resultant out-of-bounds read, because it can cause t2p->t_name strings to lack a final '\0' character.

CVSS v3 Severity:

8.1 High (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H)
7.1 High (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C)

Exploitability Metrics:	Attack Vector (AV): Network Attack Complexity (AC): High Privileges Required (PR): None User Interaction (UI): None
Scope:	Scope (S): Unchanged
Impact Metrics:	Confidentiality (C): High Integrity (I): High 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:

6.8 Medium (CVSS v2 Vector: AV:N/AC:M/Au:N/C:P/I:P/A:P)

Exploitability Metrics:	Access Vector (AV): Network Access Complexity (AC): Medium Authentication (Au): None
Impact Metrics:	Confidentiality (C): Partial Integrity (I): Partial Availibility (A): Partial

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-125
CWE-362

Vulnerability Consequences:

Denial of Service

References:

Source: MITRE
Type: CNA
CVE-2017-15037

Source: BID
Type: Third Party Advisory, VDB Entry
101191

Source: CCN
Type: BID-101191
FreeBSD 'sys/netsmb/smb_subr.c' Local Race Condition Vulnerability

Source: CCN
Type: FreeBSD Bugzilla Bug 222687
smb_strdupin() does not properly check the length of string duped-in

Source: CONFIRM
Type: Issue Tracking, Vendor Advisory
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=222687

Source: XF
Type: UNKNOWN
freebsd-cve201715037-dos(133033)

Source: CCN
Type: FreeBSD Web site
netsmb: Fix buggy/racy smb_strdupin()

Source: CONFIRM
Type: Issue Tracking, Vendor Advisory
https://svnweb.freebsd.org/base?view=revision&revision=324102

Vulnerable Configuration:

Configuration 1:

cpe:/o:freebsd:freebsd:*:*:*:*:*:*:*:* (Version <= 11.1)

Configuration CCN 1:

cpe:/o:freebsd:freebsd:11.1:*:*:*:*:*:*:*

Denotes that component is vulnerable

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