Vulnerability Name:

CVE-2021-42327 (CCN-211855)

Assigned:2021-10-12
Published:2021-10-12
Updated:2021-11-28
Summary:dp_link_settings_write in drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c in the Linux kernel through 5.14.14 allows a heap-based buffer overflow by an attacker who can write a string to the AMD GPU display drivers debug filesystem. There are no checks on size within parse_write_buffer_into_params when it uses the size of copy_from_user to copy a userspace buffer into a 40-byte heap buffer.
CVSS v3 Severity:6.7 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H)
5.7 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:U/RL:W/RC:R)
Exploitability Metrics:Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): High
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): High
Integrity (I): High
Availibility (A): High
7.8 High (CCN CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
6.7 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:W/RC:R)
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): High
Integrity (I): High
Availibility (A): High
CVSS v2 Severity:4.6 Medium (CVSS v2 Vector: AV:L/AC:L/Au:N/C:P/I:P/A:P)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Low
Authentication (Au): None
Impact Metrics:Confidentiality (C): Partial
Integrity (I): Partial
Availibility (A): Partial
6.8 Medium (CCN CVSS v2 Vector: AV:L/AC:L/Au:S/C:C/I:C/A:C)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Low
Athentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): Complete
Integrity (I): Complete
Availibility (A): Complete
Vulnerability Type:CWE-787
Vulnerability Consequences:Gain Access
References:Source: MITRE
Type: CNA
CVE-2021-42327

Source: XF
Type: UNKNOWN
linux-kernel-cve202142327-bo(211855)

Source: CCN
Type: Linux Kernel GIT Repository
Linux Kernel

Source: MISC
Type: Vendor Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/log/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c

Source: FEDORA
Type: Mailing List, Third Party Advisory
FEDORA-2021-a093973910

Source: CONFIRM
Type: Third Party Advisory
https://security.netapp.com/advisory/ntap-20211118-0005/

Source: MISC
Type: Mailing List, Patch, Third Party Advisory
https://www.mail-archive.com/amd-gfx@lists.freedesktop.org/msg69080.html

Source: CCN
Type: WhiteSource Vulnerability Database
CVE-2021-42327

Vulnerable Configuration:Configuration 1:
  • cpe:/o:linux:linux_kernel:*:*:*:*:*:*:*:* (Version <= 5.14.14)

    • Configuration 2:
  • cpe:/o:fedoraproject:fedora:35:*:*:*:*:*:*:*

    • Configuration 3:
  • cpe:/o:netapp:h300s_firmware:-:*:*:*:*:*:*:*
  • AND
  • cpe:/h:netapp:h300s:-:*:*:*:*:*:*:*

    • Configuration 4:
  • cpe:/o:netapp:h500s_firmware:-:*:*:*:*:*:*:*
  • AND
  • cpe:/h:netapp:h500s:-:*:*:*:*:*:*:*

    • Configuration 5:
  • cpe:/o:netapp:h700s_firmware:-:*:*:*:*:*:*:*
  • AND
  • cpe:/h:netapp:h700s:-:*:*:*:*:*:*:*

    • Configuration 6:
  • cpe:/o:netapp:h300e_firmware:-:*:*:*:*:*:*:*
  • AND
  • cpe:/h:netapp:h300e:-:*:*:*:*:*:*:*

    • Configuration 7:
  • cpe:/o:netapp:h500e_firmware:-:*:*:*:*:*:*:*
  • AND
  • cpe:/h:netapp:h500e:-:*:*:*:*:*:*:*

    • Configuration 8:
  • cpe:/o:netapp:h700e_firmware:-:*:*:*:*:*:*:*
  • AND
  • cpe:/h:netapp:h700e:-:*:*:*:*:*:*:*

    • Configuration 9:
  • cpe:/o:netapp:h410s_firmware:-:*:*:*:*:*:*:*
  • AND
  • cpe:/h:netapp:h410s:-:*:*:*:*:*:*:*

    • Configuration 10:
  • cpe:/o:netapp:h410c_firmware:-:*:*:*:*:*:*:*
  • AND
  • cpe:/h:netapp:h410c:-:*:*:*:*:*:*:*

    • Configuration CCN 1:
  • cpe:/o:linux:linux_kernel:5.14.14:*:*:*:*:*:*:*

    • * 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:3567
    P
    		libXtst6-1.2.2-7.1 on GA media (Moderate)
    2022-06-28
    oval:org.opensuse.security:def:3398
    P
    		wpa_supplicant-2.6-15.10.1 on GA media (Moderate)
    2022-06-28
    oval:org.opensuse.security:def:3448
    P
    		busybox-1.21.1-3.3 on GA media (Moderate)
    2022-06-28
    oval:org.opensuse.security:def:3453
    P
    		clamav-0.101.3-1.19 on GA media (Moderate)
    2022-06-28
    oval:org.opensuse.security:def:95078
    P
    		reiserfs-kmp-default-5.14.21-150400.22.1 on GA media (Moderate)
    2022-06-22
    oval:org.opensuse.security:def:2960
    P
    		kernel-64kb-5.14.21-150400.22.1 on GA media (Moderate)
    2022-06-22
    oval:org.opensuse.security:def:95083
    P
    		kernel-azure-5.14.21-150400.12.1 on GA media (Moderate)
    2022-06-22
    oval:org.opensuse.security:def:94590
    P
    		kernel-64kb-5.14.21-150400.22.1 on GA media (Moderate)
    2022-06-22
    oval:org.opensuse.security:def:95197
    P
    		kernel-default-extra-5.14.21-150400.22.1 on GA media (Moderate)
    2022-06-22
    oval:org.opensuse.security:def:95028
    P
    		kernel-docs-5.14.21-150400.22.1 on GA media (Moderate)
    2022-06-22
    BACK
    linux linux kernel *
    fedoraproject fedora 35
    netapp h300s firmware -
    netapp h300s -
    netapp h500s firmware -
    netapp h500s -
    netapp h700s firmware -
    netapp h700s -
    netapp h300e firmware -
    netapp h300e -
    netapp h500e firmware -
    netapp h500e -
    netapp h700e firmware -
    netapp h700e -
    netapp h410s firmware -
    netapp h410s -
    netapp h410c firmware -
    netapp h410c -
    linux linux kernel 5.14.14