Ubuntu.comUB:CVE-2016-6318CVE-2016-6318
7.2 High
CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:L/AC:L/Au:N/C:C/I:C/A:C
7.8 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
0.0004 Low
EPSS
Percentile
5.1%
Stack-based buffer overflow in the FascistGecosUser function in
lib/fascist.c in cracklib allows local users to cause a denial of service
(application crash) or gain privileges via a long GECOS field, involving
longbuffer.
Bugs
Notes
| Author | Note |
|---|---|
| tyhicks | Ubuntu’s chfn limits the total GECOS field length to 84 characters which is well within cracklib2’s buffer size of 2048. libpam-cracklib is not part of the default install so PAM cracklib support is not enabled in the majority of Ubuntu installs Ubuntu’s /etc/login.defs only allows unprivileged users to set their room number, work phone, and home phone |
Related
7.2 High
CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:L/AC:L/Au:N/C:C/I:C/A:C
7.8 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
0.0004 Low
EPSS
Percentile
5.1%