Vulnerability Name:

CCN-98920

Published:2014-11-23
Updated:2014-11-23
Summary:Linux Kernel, that support espfix64, could allow a local attacker to bypass security restrictions, caused by a double fault when trying and failing to return directly to userspace from IST
context. A local attacker could exploit this vulnerability to bypass security restrictions and perform unauthorized actions.
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:OF/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: oss-security Mailing List, Sun, 23 Nov 2014 16:18:16 -0800
CVE Request: Linux kernel LDT handling bugs

Source: CCN
Type: BID-71252
Linux Kernel 'espfix64' Double Fault Local Security Bypass Vulnerability

Source: XF
Type: UNKNOWN
linux-kernel-espfix64-sec-bypass(98920)

Source: CCN
Type: Linux Kernel GIT Repository
x86_64, traps: Stop using IST for #SS

Vulnerable Configuration:Configuration CCN 1:
  • cpe:/a:accelatech:bizsearch:3.2:-:*:*:*:linux_kernel:*:*

    • * Denotes that component is vulnerable
    BACK
    accelatech bizsearch 3.2 -