Vulnerability Name:

CVE-2020-8341 (CCN-187703)

Assigned:2020-08-31
Published:2020-08-31
Updated:2020-09-11
Summary:In Lenovo systems, SMM BIOS Write Protection is used to prevent writes to SPI Flash. While this provides sufficient protection, an additional layer of protection is provided by SPI Protected Range Registers (PRx). After resuming from S3 sleep mode in various versions of BIOS for some Lenovo ThinkPad systems, the PRx is not set. This does not impact the SMM BIOS Write Protection, which keeps systems protected.
CVSS v3 Severity:2.4 Low (CVSS v3.1 Vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N)
2.1 Low (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Physical
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
2.4 Low (CCN CVSS v3.1 Vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N)
2.1 Low (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Physical
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 (CVSS v2 Vector: AV:L/AC:L/Au:N/C:N/I:P/A:N)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Low
Authentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): Partial
Availibility (A): None
2.1 Low (CCN CVSS v2 Vector: AV:L/AC:L/Au:N/C:N/I:P/A:N)
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 Type:CWE-noinfo
Vulnerability Consequences:Gain Access
References:Source: MITRE
Type: CNA
CVE-2020-8341

Source: XF
Type: UNKNOWN
lenovo-cve20208341-unspecified(187703)

Source: CCN
Type: Lenovo Security Advisory: LEN-30042
Multi-vendor BIOS Security Vulnerabilities (June 2020)

Source: MISC
Type: Vendor Advisory
https://support.lenovo.com/us/en/product_security/LEN-30042

Vulnerable Configuration:Configuration 1:
  • cpe:/o:lenovo:thinkpad_t490_(20nx)_firmware:*:*:*:*:*:*:*:* (Version < n2iet90w)
  • AND
  • cpe:/h:lenovo:thinkpad_t490_(20nx):-:*:*:*:*:*:*:*

  • Configuration 2:
  • cpe:/o:lenovo:thinkpad_t490_(20qx)_firmware:*:*:*:*:*:*:*:* (Version < n2iet90w)
  • AND
  • cpe:/h:lenovo:thinkpad_t490_(20qx):-:*:*:*:*:*:*:*

  • Configuration 3:
  • cpe:/o:lenovo:thinkpad_t490_(20rx)_firmware:*:*:*:*:*:*:*:* (Version < n2ret16w)
  • AND
  • cpe:/h:lenovo:thinkpad_t490_(20rx):-:*:*:*:*:*:*:*

  • Configuration 4:
  • cpe:/o:lenovo:thinkpad_t490s_(20nx)_firmware:*:*:*:*:*:*:*:* (Version < n2jet89w)
  • AND
  • cpe:/h:lenovo:thinkpad_t490s_(20nx):-:*:*:*:*:*:*:*

  • Configuration 5:
  • cpe:/o:lenovo:thinkpad_t495_drift_firmware:*:*:*:*:*:*:*:* (Version < 2020-08-30)
  • AND
  • cpe:/h:lenovo:thinkpad_t495_drift:-:*:*:*:*:*:*:*

  • Configuration 6:
  • cpe:/o:lenovo:thinkpad_t590_(20nx)_firmware:*:*:*:*:*:*:*:* (Version < n2iet90w)
  • AND
  • cpe:/h:lenovo:thinkpad_t590_(20nx):-:*:*:*:*:*:*:*

  • Configuration 7:
  • cpe:/o:lenovo:thinkpad_x1_carbon_(20qx)_firmware:*:*:*:*:*:*:*:* (Version < n2het54w)
  • AND
  • cpe:/h:lenovo:thinkpad_x1_carbon_(20qx):-:*:*:*:*:*:*:*

  • Configuration 8:
  • cpe:/o:lenovo:thinkpad_x1_yoga_(20qx)_firmware:*:*:*:*:*:*:*:* (Version < n2het54w)
  • AND
  • cpe:/h:lenovo:thinkpad_x1_yoga_(20qx):-:*:*:*:*:*:*:*

  • Configuration 9:
  • cpe:/o:lenovo:thinkpad_x390_(20qx)_firmware:*:*:*:*:*:*:*:* (Version < n2jet89w)
  • AND
  • cpe:/h:lenovo:thinkpad_x390_(20qx):-:*:*:*:*:*:*:*

  • Configuration 10:
  • cpe:/o:lenovo:thinkpad_x390_(20sx)_firmware:*:*:*:*:*:*:*:* (Version < n2set18w)
  • AND
  • cpe:/h:lenovo:thinkpad_x390_(20sx):-:*:*:*:*:*:*:*

  • Configuration CCN 1:
  • cpe:/h:lenovo:thinkpad_s3:-:*:*:*:*:*:*:*

  • * Denotes that component is vulnerable
    BACK
    lenovo thinkpad t490 (20nx) firmware *
    lenovo thinkpad t490 (20nx) -
    lenovo thinkpad t490 (20qx) firmware *
    lenovo thinkpad t490 (20qx) -
    lenovo thinkpad t490 (20rx) firmware *
    lenovo thinkpad t490 (20rx) -
    lenovo thinkpad t490s (20nx) firmware *
    lenovo thinkpad t490s (20nx) -
    lenovo thinkpad t495 drift firmware *
    lenovo thinkpad t495 drift -
    lenovo thinkpad t590 (20nx) firmware *
    lenovo thinkpad t590 (20nx) -
    lenovo thinkpad x1 carbon (20qx) firmware *
    lenovo thinkpad x1 carbon (20qx) -
    lenovo thinkpad x1 yoga (20qx) firmware *
    lenovo thinkpad x1 yoga (20qx) -
    lenovo thinkpad x390 (20qx) firmware *
    lenovo thinkpad x390 (20qx) -
    lenovo thinkpad x390 (20sx) firmware *
    lenovo thinkpad x390 (20sx) -
    lenovo thinkpad s3 -