Vulnerability Name:

CVE-2016-3067 (CCN-125718)

Assigned:2016-02-09
Published:2016-02-09
Updated:2017-04-27
Summary:Cygwin before 2.5.0 does not properly handle updating permissions when changing users, which allows attackers to gain privileges.
CVSS v3 Severity:9.8 Critical (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
8.5 High (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/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): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): High
Integrity (I): High
Availibility (A): High
7.3 High (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L)
6.4 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): Low
Integrity (I): Low
Availibility (A): Low
CVSS v2 Severity:7.5 High (CVSS v2 Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Authentication (Au): None
Impact Metrics:Confidentiality (C): Partial
Integrity (I): Partial
Availibility (A): Partial
7.5 High (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): Partial
Integrity (I): Partial
Availibility (A): Partial
Vulnerability Type:CWE-264
Vulnerability Consequences:Gain Privileges
References:Source: MITRE
Type: CNA
CVE-2016-3067

Source: MLIST
Type: Mailing List, Release Notes, Vendor Advisory
[cygwin-announce] 20160218 TEST RELEASE: Cygwin 2.5.0-0.4

Source: MLIST
Type: Mailing List, Release Notes, Vendor Advisory
[cygwin-announce] 20160411 Cygwin 2.5.0-1

Source: MLIST
Type: Mailing List, Release Notes, Vendor Advisory
[cygwin-announce] 20160419 CVE-2016-3067: network privilege escalation in Cygwin set(e)ui

Source: CCN
Type: Cygwin Web site
RE: Possible Security Hole in SSHD w/ CYGWIN?

Source: MLIST
Type: Mailing List, Release Notes, Vendor Advisory
[cygwin] 20160208 Possible Security Hole in SSHD w/ CYGWIN?

Source: XF
Type: UNKNOWN
cygwin-cve20163067-priv-esc(125718)

Source: CONFIRM
Type: Patch
https://sourceware.org/git/?p=newlib-cygwin.git;a=commit;h=205862ed08649df8f50b926a2c58c963f571b044

Vulnerable Configuration:Configuration 1:
  • cpe:/a:cygwin:cygwin:*:*:*:*:*:*:*:* (Version <= 2.4.1-1)

    • Configuration CCN 1:
  • cpe:/a:cygwin:cygwin:*:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    BACK
    cygwin cygwin *
    cygwin cygwin *