Vulnerability Name:

CVE-2016-2854 (CCN-112867)

Assigned:2016-02-24
Published:2016-02-24
Updated:2020-08-07
Summary:The aufs module for the Linux kernel 3.x and 4.x does not properly maintain POSIX ACL xattr data, which allows local users to gain privileges by leveraging a group-writable setgid directory.
CVSS v3 Severity:7.8 High (CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
6.9 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:U/RC:R)
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): High
Integrity (I): High
Availibility (A): High
5.9 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L)
5.2 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:U/RL:U/RC:R)
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): Low
Integrity (I): Low
Availibility (A): Low
CVSS v2 Severity:4.6 Medium (CVSS v2 Vector: AV:L/AC:L/Au:N/C:P/I:P/A:P)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Low
Authentication (Au): None
Impact Metrics:Confidentiality (C): Partial
Integrity (I): Partial
Availibility (A): Partial
4.6 Medium (CCN CVSS v2 Vector: AV:L/AC:L/Au:N/C:P/I:P/A:P)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): Partial
Integrity (I): Partial
Availibility (A): Partial
Vulnerability Type:CWE-269
Vulnerability Consequences:Gain Privileges
References:Source: MITRE
Type: CNA
CVE-2016-2854

Source: CCN
Type: oss-sec Mailing List, Wed, 24 Feb 2016 06:14:56 +0000
Aufs Union Filesystem Privilege Escalation In User Namespaces

Source: MISC
Type: Exploit, Third Party Advisory
http://www.halfdog.net/Security/2016/AufsPrivilegeEscalationInUserNamespaces/

Source: MLIST
Type: Exploit, Mailing List, Third Party Advisory
[oss-security] 20160224 Aufs Union Filesystem Privilege Escalation In User Namespaces

Source: BID
Type: Third Party Advisory, VDB Entry
96838

Source: CCN
Type: BID-96838
Linux Kernel CVE-2016-2854 Local Privilege Escalation Vulnerability

Source: XF
Type: UNKNOWN
linux-kernel-cve20162854-priv-esc(112867)

Source: MLIST
Type: Third Party Advisory
[aufs] 20160219 aufs3 and aufs4 GIT release

Vulnerable Configuration:Configuration 1:
  • cpe:/o:linux:linux_kernel:*:*:*:*:*:*:*:* (Version >= 3.0.0 and <= 3.19.8)
  • OR cpe:/o:linux:linux_kernel:*:*:*:*:*:*:*:* (Version >= 4.0.0 and <= 4.20.15)

    • Configuration CCN 1:
  • cpe:/o:linux:linux_kernel:3.0:-:*:*:*:*:*:*
  • OR cpe:/o:linux:linux_kernel:4.0.5:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:com.ubuntu.bionic:def:201628540000000
    V
    		CVE-2016-2854 on Ubuntu 18.04 LTS (bionic) - low.
    2016-05-02
    oval:com.ubuntu.artful:def:20162854000
    V
    		CVE-2016-2854 on Ubuntu 17.10 (artful) - low.
    2016-05-02
    oval:com.ubuntu.trusty:def:20162854000
    V
    		CVE-2016-2854 on Ubuntu 14.04 LTS (trusty) - low.
    2016-05-02
    oval:com.ubuntu.xenial:def:201628540000000
    V
    		CVE-2016-2854 on Ubuntu 16.04 LTS (xenial) - low.
    2016-05-02
    oval:com.ubuntu.bionic:def:20162854000
    V
    		CVE-2016-2854 on Ubuntu 18.04 LTS (bionic) - low.
    2016-05-02
    oval:com.ubuntu.xenial:def:20162854000
    V
    		CVE-2016-2854 on Ubuntu 16.04 LTS (xenial) - low.
    2016-05-02
    oval:com.ubuntu.disco:def:201628540000000
    V
    		CVE-2016-2854 on Ubuntu 19.04 (disco) - low.
    2016-05-02
    oval:com.ubuntu.cosmic:def:20162854000
    V
    		CVE-2016-2854 on Ubuntu 18.10 (cosmic) - low.
    2016-05-02
    oval:com.ubuntu.cosmic:def:201628540000000
    V
    		CVE-2016-2854 on Ubuntu 18.10 (cosmic) - low.
    2016-05-02
    oval:com.ubuntu.precise:def:20162854000
    V
    		CVE-2016-2854 on Ubuntu 12.04 LTS (precise) - low.
    2016-05-02
    BACK
    linux linux kernel *
    linux linux kernel *
    linux linux kernel 3.0
    linux linux kernel 4.0.5