Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2016-9604

Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
11/07/2018
Last modified:
07/11/2023

Description

It was discovered in the Linux kernel before 4.11-rc8 that root can gain direct access to an internal keyring, such as '.dns_resolver' in RHEL-7 or '.builtin_trusted_keys' upstream, by joining it as its session keyring. This allows root to bypass module signature verification by adding a new public key of its own devising to the keyring.

Impact

Vector 3.x
CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N CVSS v3.1 Severity and Metrics:

Base Score: 4.40 MEDIUM
Vector: CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): High
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): High
Availability (A): None

Base Score 3.x
4.40
Severity 3.x
MEDIUM
Vector 2.0
AV:L/AC:L/Au:N/C:N/I:P/A:N CVSS v2.0 Severity and Metrics:

Base Score: 2.10 LOW
Vector: AV:L/AC:L/Au:N/C:N/I:P/A:N

Attack Vector (AV): Local
Attack Complexity (AC): Low
Authentication (Au): None
Confidentiality (C): None
Integrity (I): Physical
Availability (A): None

Base Score 2.0
2.10
Severity 2.0
LOW

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 4.11 (including)
cpe:2.3:o:linux:linux_kernel:4.11:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:4.11:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:4.11:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:4.11:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:4.11:rc5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:4.11:rc6:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:4.11:rc7:*:*:*:*:*:*

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools