Vulnerability Name:

CVE-2021-33135 (CCN-226165)

Assigned:2021-05-18
Published:2022-05-10
Updated:2022-05-24
Summary:Uncontrolled resource consumption in the Linux kernel drivers for Intel(R) SGX may allow an authenticated user to potentially enable denial of service via local access.
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:N/A:H)
4.8 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/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): None
Availibility (A): High
3.2 Low (CCN CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:L)
2.8 Low (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:L/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): High
User Interaction (UI): None
Scope:Scope (S): Changed
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Low
CVSS v2 Severity:2.1 Low (CVSS v2 Vector: AV:L/AC:L/Au:N/C:N/I:N/A:P)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Low
Authentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Partial
1.7 Low (CCN CVSS v2 Vector: AV:L/AC:L/Au:S/C:N/I:N/A:P)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Low
Athentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Partial
Vulnerability Type:CWE-400
Vulnerability Consequences:Denial of Service
References:Source: MITRE
Type: CNA
CVE-2021-33135

Source: XF
Type: UNKNOWN
intel-cve202133135-dos(226165)

Source: CCN
Type: INTEL-SA-00603
Intel SGX Linux Kernel Drivers Advisory

Source: MISC
Type: Product, Vendor Advisory
https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00603.html

Vulnerable Configuration:Configuration 1:
  • cpe:/a:intel:software_guard_extensions:*:*:*:*:*:linux:*:* (Version <= 2.14)

    • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:org.opensuse.security:def:8029
    P
    		kernel-docs-5.14.21-150500.53.2 on GA media (Moderate)
    2023-06-20
    oval:org.opensuse.security:def:8090
    P
    		reiserfs-kmp-default-5.14.21-150500.53.2 on GA media (Moderate)
    2023-06-12
    oval:org.opensuse.security:def:7539
    P
    		kernel-64kb-5.14.21-150500.53.2 on GA media (Moderate)
    2023-06-12
    oval:org.opensuse.security:def:762
    P
    		Security update for the Linux Kernel (Important)
    2022-09-16
    oval:org.opensuse.security:def:764
    P
    		Security update for the Linux Kernel (Important)
    2022-09-16
    BACK
    intel software guard extensions *