Vulnerability Name:

CCN-61191

Published:2009-12-21
Updated:2009-12-21
Summary:FreeBSD could allow a local attacker to bypass security restrictions, caused by specific user settings being applied while running under the privileges of another user by the setusercontext() function. By creating a specially-crafted ~/.login_conf file and logging in using OpenSSH, a local attacker could exploit this vulnerability to modify resource limits.
CVSS v3 Severity:4.0 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N)
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): Low
Availibility (A): None
CVSS v2 Severity:2.1 Low (CCN CVSS v2 Vector: AV:L/AC:L/Au:N/C:N/I:P/A:N)
1.6 Low (CCN Temporal CVSS v2 Vector: AV:L/AC:L/Au:N/C:N/I:P/A:N/E:U/RL:TF/RC:C)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): Partial
Availibility (A): None
Vulnerability Consequences:Bypass Security
References:Source: CCN
Type: SA40923
FreeBSD setusercontext() Security Bypass Vulnerability

Source: CCN
Type: FreeBSD CVS Repository
FreeBSD

Source: CCN
Type: FreeBSD Web site
OpenSSH allow raise resource limit via .login_conf

Source: CCN
Type: OSVDB ID: 67235
FreeBSD lib/libutil/login_class.c setusercontext() Function Restriction Bypass

Source: CCN
Type: BID-42533
FreeBSD 'setusercontext()' Local Security Bypass Vulnerability

Source: XF
Type: UNKNOWN
freebsd-setusercontext-security-bypass(61191)

Vulnerable Configuration:Configuration CCN 1:
  • cpe:/o:freebsd:freebsd:7.1:-:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    BACK
    freebsd freebsd 7.1 -