Vulnerability Name:

CVE-2016-2085 (CCN-113821)

Assigned:2016-01-27
Published:2016-01-27
Updated:2016-12-03
Summary:The evm_verify_hmac function in security/integrity/evm/evm_main.c in the Linux kernel before 4.5 does not properly copy data, which makes it easier for local users to forge MAC values via a timing side-channel attack.
CVSS v3 Severity:5.5 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N)
4.8 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C)
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): None
Integrity (I): High
Availibility (A): None
6.2 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N)
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:H/A:N/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): High
Availibility (A): None
CVSS v2 Severity:2.1 Low (CVSS v2 Vector: AV:L/AC:L/Au:N/C:N/I:P/A:N)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Low
Authentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): Partial
Availibility (A): None
4.9 Medium (CCN CVSS v2 Vector: AV:L/AC:L/Au:N/C:N/I:C/A:N)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): Complete
Availibility (A): None
Vulnerability Type:CWE-19
Vulnerability Consequences:Bypass Security
References:Source: MITRE
Type: CNA
CVE-2016-2085

Source: CCN
Type: Linux Kernel GIT Repository
EVM: Use crypto_memneq() for digest comparisons

Source: CONFIRM
Type: Vendor Advisory
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=613317bd212c585c20796c10afe5daaa95d4b0a1

Source: UBUNTU
Type: UNKNOWN
USN-2946-1

Source: UBUNTU
Type: UNKNOWN
USN-2946-2

Source: UBUNTU
Type: UNKNOWN
USN-2947-1

Source: UBUNTU
Type: UNKNOWN
USN-2947-2

Source: UBUNTU
Type: UNKNOWN
USN-2947-3

Source: UBUNTU
Type: UNKNOWN
USN-2948-1

Source: UBUNTU
Type: UNKNOWN
USN-2948-2

Source: UBUNTU
Type: UNKNOWN
USN-2949-1

Source: CONFIRM
Type: UNKNOWN
https://bugzilla.redhat.com/show_bug.cgi?id=1324867

Source: XF
Type: UNKNOWN
linux-kernel-cve20162085-sec-bypass(113821)

Source: CONFIRM
Type: Patch, Vendor Advisory
https://github.com/torvalds/linux/commit/613317bd212c585c20796c10afe5daaa95d4b0a1

Source: CONFIRM
Type: UNKNOWN
https://people.canonical.com/~ubuntu-security/cve/2016/CVE-2016-2085.html

Source: CONFIRM
Type: UNKNOWN
https://security-tracker.debian.org/tracker/CVE-2016-2085

Source: CCN
Type: WhiteSource Vulnerability Database
CVE-2016-2085

Vulnerable Configuration:Configuration 1:
  • cpe:/o:linux:linux_kernel:*:*:*:*:*:*:*:* (Version <= 4.4.8)

    • Configuration CCN 1:
  • cpe:/o:linux:linux_kernel:4.4.0:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:com.ubuntu.precise:def:20162085000
    V
    		CVE-2016-2085 on Ubuntu 12.04 LTS (precise) - low.
    2016-04-27
    oval:com.ubuntu.trusty:def:20162085000
    V
    		CVE-2016-2085 on Ubuntu 14.04 LTS (trusty) - low.
    2016-04-27
    oval:com.ubuntu.xenial:def:20162085000
    V
    		CVE-2016-2085 on Ubuntu 16.04 LTS (xenial) - low.
    2016-04-27
    oval:com.ubuntu.xenial:def:201620850000000
    V
    		CVE-2016-2085 on Ubuntu 16.04 LTS (xenial) - low.
    2016-04-27
    BACK
    linux linux kernel *
    linux linux kernel 4.4.0