Vulnerability Name:

CVE-2021-26327 (CCN-213709)

Assigned:2021-11-01
Published:2021-11-01
Updated:2021-11-19
Summary:Insufficient validation of guest context in the SNP Firmware could lead to a potential loss of guest confidentiality.
CVSS v3 Severity:5.5 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N)
4.8 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/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): High
Integrity (I): None
Availibility (A): None
5.5 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N)
4.8 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/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): High
Integrity (I): None
Availibility (A): None
CVSS v2 Severity:2.1 Low (CVSS v2 Vector: AV:L/AC:L/Au:N/C:P/I:N/A:N)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Low
Authentication (Au): None
Impact Metrics:Confidentiality (C): Partial
Integrity (I): None
Availibility (A): None
4.6 Medium (CCN CVSS v2 Vector: AV:L/AC:L/Au:S/C:C/I:N/A:N)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Low
Athentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): Complete
Integrity (I): None
Availibility (A): None
Vulnerability Type:CWE-668
Vulnerability Consequences:Obtain Information
References:Source: MITRE
Type: CNA
CVE-2021-26327

Source: XF
Type: UNKNOWN
amd-cve202126327-info-disc(213709)

Source: CCN
Type: AMD-SB-1021
AMD Server Vulnerabilities

Source: MISC
Type: Vendor Advisory
https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1021

Vulnerable Configuration:Configuration 1:
  • cpe:/o:amd:epyc_7003_firmware:*:*:*:*:*:*:*:* (Version < milanpi-sp3_1.0.0.4)
  • AND
  • cpe:/h:amd:epyc_7003:-:*:*:*:*:*:*:*

    • Configuration 2:
  • cpe:/o:amd:epyc_72f3_firmware:*:*:*:*:*:*:*:* (Version < milanpi-sp3_1.0.0.4)
  • AND
  • cpe:/h:amd:epyc_72f3:-:*:*:*:*:*:*:*

    • Configuration 3:
  • cpe:/o:amd:epyc_7313_firmware:*:*:*:*:*:*:*:* (Version < milanpi-sp3_1.0.0.4)
  • AND
  • cpe:/h:amd:epyc_7313:-:*:*:*:*:*:*:*

    • Configuration 4:
  • cpe:/o:amd:epyc_7313p_firmware:*:*:*:*:*:*:*:* (Version < milanpi-sp3_1.0.0.4)
  • AND
  • cpe:/h:amd:epyc_7313p:-:*:*:*:*:*:*:*

    • Configuration 5:
  • cpe:/o:amd:epyc_7343_firmware:*:*:*:*:*:*:*:* (Version < milanpi-sp3_1.0.0.4)
  • AND
  • cpe:/h:amd:epyc_7343:-:*:*:*:*:*:*:*

    • Configuration 6:
  • cpe:/o:amd:epyc_73f3_firmware:*:*:*:*:*:*:*:* (Version < milanpi-sp3_1.0.0.4)
  • AND
  • cpe:/h:amd:epyc_73f3:-:*:*:*:*:*:*:*

    • Configuration 7:
  • cpe:/o:amd:epyc_7413_firmware:*:*:*:*:*:*:*:* (Version < milanpi-sp3_1.0.0.4)
  • AND
  • cpe:/h:amd:epyc_7413:-:*:*:*:*:*:*:*

    • Configuration 8:
  • cpe:/o:amd:epyc_7443_firmware:*:*:*:*:*:*:*:* (Version < milanpi-sp3_1.0.0.4)
  • AND
  • cpe:/h:amd:epyc_7443:-:*:*:*:*:*:*:*

    • Configuration 9:
  • cpe:/o:amd:epyc_7443p_firmware:*:*:*:*:*:*:*:* (Version < milanpi-sp3_1.0.0.4)
  • AND
  • cpe:/h:amd:epyc_7443p:-:*:*:*:*:*:*:*

    • Configuration 10:
  • cpe:/o:amd:epyc_7453_firmware:*:*:*:*:*:*:*:* (Version < milanpi-sp3_1.0.0.4)
  • AND
  • cpe:/h:amd:epyc_7453:-:*:*:*:*:*:*:*

    • Configuration 11:
  • cpe:/o:amd:epyc_74f3_firmware:*:*:*:*:*:*:*:* (Version < milanpi-sp3_1.0.0.4)
  • AND
  • cpe:/h:amd:epyc_74f3:-:*:*:*:*:*:*:*

    • Configuration 12:
  • cpe:/o:amd:epyc_7513_firmware:*:*:*:*:*:*:*:* (Version < milanpi-sp3_1.0.0.4)
  • AND
  • cpe:/h:amd:epyc_7513:-:*:*:*:*:*:*:*

    • Configuration 13:
  • cpe:/o:amd:epyc_7543_firmware:*:*:*:*:*:*:*:* (Version < milanpi-sp3_1.0.0.4)
  • AND
  • cpe:/h:amd:epyc_7543:-:*:*:*:*:*:*:*

    • Configuration 14:
  • cpe:/o:amd:epyc_7543p_firmware:*:*:*:*:*:*:*:* (Version < milanpi-sp3_1.0.0.4)
  • AND
  • cpe:/h:amd:epyc_7543p:-:*:*:*:*:*:*:*

    • Configuration 15:
  • cpe:/o:amd:epyc_75f3_firmware:*:*:*:*:*:*:*:* (Version < milanpi-sp3_1.0.0.4)
  • AND
  • cpe:/h:amd:epyc_75f3:-:*:*:*:*:*:*:*

    • Configuration 16:
  • cpe:/o:amd:epyc_7643_firmware:*:*:*:*:*:*:*:* (Version < milanpi-sp3_1.0.0.4)
  • AND
  • cpe:/h:amd:epyc_7643:-:*:*:*:*:*:*:*

    • Configuration 17:
  • cpe:/o:amd:epyc_7663_firmware:*:*:*:*:*:*:*:* (Version < milanpi-sp3_1.0.0.4)
  • AND
  • cpe:/h:amd:epyc_7663:-:*:*:*:*:*:*:*

    • Configuration 18:
  • cpe:/o:amd:epyc_7713_firmware:*:*:*:*:*:*:*:* (Version < milanpi-sp3_1.0.0.4)
  • AND
  • cpe:/h:amd:epyc_7713:-:*:*:*:*:*:*:*

    • Configuration 19:
  • cpe:/o:amd:epyc_7713p_firmware:*:*:*:*:*:*:*:* (Version < milanpi-sp3_1.0.0.4)
  • AND
  • cpe:/h:amd:epyc_7713p:-:*:*:*:*:*:*:*

    • Configuration 20:
  • cpe:/o:amd:epyc_7763_firmware:*:*:*:*:*:*:*:* (Version < milanpi-sp3_1.0.0.4)
  • AND
  • cpe:/h:amd:epyc_7763:-:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    BACK
    amd epyc 7003 firmware *
    amd epyc 7003 -
    amd epyc 72f3 firmware *
    amd epyc 72f3 -
    amd epyc 7313 firmware *
    amd epyc 7313 -
    amd epyc 7313p firmware *
    amd epyc 7313p -
    amd epyc 7343 firmware *
    amd epyc 7343 -
    amd epyc 73f3 firmware *
    amd epyc 73f3 -
    amd epyc 7413 firmware *
    amd epyc 7413 -
    amd epyc 7443 firmware *
    amd epyc 7443 -
    amd epyc 7443p firmware *
    amd epyc 7443p -
    amd epyc 7453 firmware *
    amd epyc 7453 -
    amd epyc 74f3 firmware *
    amd epyc 74f3 -
    amd epyc 7513 firmware *
    amd epyc 7513 -
    amd epyc 7543 firmware *
    amd epyc 7543 -
    amd epyc 7543p firmware *
    amd epyc 7543p -
    amd epyc 75f3 firmware *
    amd epyc 75f3 -
    amd epyc 7643 firmware *
    amd epyc 7643 -
    amd epyc 7663 firmware *
    amd epyc 7663 -
    amd epyc 7713 firmware *
    amd epyc 7713 -
    amd epyc 7713p firmware *
    amd epyc 7713p -
    amd epyc 7763 firmware *
    amd epyc 7763 -