CVE-2017-12192

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2017-12192
The keyctl_read_key function in security/keys/keyctl.c in the Key Management subcomponent in the Linux kernel before 4.13.5 does not properly consider that a key may be possessed but negatively instantiated, which allows local users to cause a denial of service (OOPS and system crash) via a crafted KEYCTL_READ operation.

5.5 /10

CVSS v3 : MEDIUM

V3 Legend

Vector : AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

4.9 /10

CVSS v2.0 : MEDIUM

V2 Legend

Vector : AV:L/AC:L/Au:N/C:N/I:N/A:C

Exploitability : 3.9 / Impact : 6.9

Access Vector LOCAL

Access Complexity LOW

Authentication NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact COMPLETE

References
Link Resource
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=37863c43b2c6464f252862bf2e9768264e961678 Patch Vendor Advisory
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.13.5 Vendor Advisory
https://access.redhat.com/errata/RHSA-2018:0151
https://bugzilla.redhat.com/show_bug.cgi?id=1493435 Issue Tracking Third Party Advisory
https://github.com/torvalds/linux/commit/37863c43b2c6464f252862bf2e9768264e961678 Patch Vendor Advisory
https://lkml.org/lkml/2017/9/18/764 Mailing List Third Party Advisory
https://usn.ubuntu.com/3583-1/
https://usn.ubuntu.com/3583-2/
Configurations

Configuration 1 (hide)

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
History

12 Feb 2023, 23:28

Type Values Removed Values Added
References
  • {'url': 'http://seclists.org/oss-sec/2017/q4/63', 'name': 'http://seclists.org/oss-sec/2017/q4/63', 'tags': [], 'refsource': 'MISC'}
  • {'url': 'https://access.redhat.com/errata/RHSA-2018:0654', 'name': 'https://access.redhat.com/errata/RHSA-2018:0654', 'tags': [], 'refsource': 'MISC'}
  • {'url': 'https://access.redhat.com/errata/RHSA-2018:0181', 'name': 'https://access.redhat.com/errata/RHSA-2018:0181', 'tags': [], 'refsource': 'MISC'}
  • {'url': 'https://access.redhat.com/security/cve/CVE-2017-12192', 'name': 'https://access.redhat.com/security/cve/CVE-2017-12192', 'tags': [], 'refsource': 'MISC'}
  • {'url': 'https://access.redhat.com/errata/RHSA-2018:0152', 'name': 'https://access.redhat.com/errata/RHSA-2018:0152', 'tags': [], 'refsource': 'MISC'}
  • {'url': 'https://access.redhat.com/errata/RHSA-2020:2430', 'name': 'https://access.redhat.com/errata/RHSA-2020:2430', 'tags': [], 'refsource': 'MISC'}
Summary A vulnerability was found in the Key Management sub component of the Linux kernel, where when trying to issue a KEYTCL_READ on a negative key would lead to a NULL pointer dereference. A local attacker could use this flaw to crash the kernel. The keyctl_read_key function in security/keys/keyctl.c in the Key Management subcomponent in the Linux kernel before 4.13.5 does not properly consider that a key may be possessed but negatively instantiated, which allows local users to cause a denial of service (OOPS and system crash) via a crafted KEYCTL_READ operation.

02 Feb 2023, 16:18

Type Values Removed Values Added
Summary The keyctl_read_key function in security/keys/keyctl.c in the Key Management subcomponent in the Linux kernel before 4.13.5 does not properly consider that a key may be possessed but negatively instantiated, which allows local users to cause a denial of service (OOPS and system crash) via a crafted KEYCTL_READ operation. A vulnerability was found in the Key Management sub component of the Linux kernel, where when trying to issue a KEYTCL_READ on a negative key would lead to a NULL pointer dereference. A local attacker could use this flaw to crash the kernel.
References
  • (MISC) http://seclists.org/oss-sec/2017/q4/63 -
  • (MISC) https://access.redhat.com/errata/RHSA-2018:0654 -
  • (MISC) https://access.redhat.com/errata/RHSA-2018:0181 -
  • (MISC) https://access.redhat.com/security/cve/CVE-2017-12192 -
  • (MISC) https://access.redhat.com/errata/RHSA-2018:0152 -
  • (MISC) https://access.redhat.com/errata/RHSA-2020:2430 -
Information

Published : 2017-10-12 00:29

Updated : 2023-12-10 12:15

NVD link : CVE-2017-12192

Mitre link : CVE-2017-12192

CVE.ORG link : CVE-2017-12192

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
CWE-476

NULL Pointer Dereference