Vulnerability Name:

CVE-2021-25631 (CCN-201148)

Assigned:2021-04-15
Published:2021-04-15
Updated:2021-05-12
Summary:In the LibreOffice 7-1 series in versions prior to 7.1.2, and in the 7-0 series in versions prior to 7.0.5, the denylist can be circumvented by manipulating the link so it doesn't match the denylist but results in ShellExecute attempting to launch an executable type.
CVSS v3 Severity:8.8 High (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H)
7.7 High (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): Required
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): High
Integrity (I): High
Availibility (A): High
9.8 Critical (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
8.5 High (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): High
Integrity (I): High
Availibility (A): High
CVSS v2 Severity:9.3 High (CVSS v2 Vector: AV:N/AC:M/Au:N/C:C/I:C/A:C)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Medium
Authentication (Au): None
Impact Metrics:Confidentiality (C): Complete
Integrity (I): Complete
Availibility (A): Complete
10.0 High (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:C/I:C/A:C)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): Complete
Integrity (I): Complete
Availibility (A): Complete
Vulnerability Type:CWE-Other
Vulnerability Consequences:Gain Access
References:Source: MITRE
Type: CNA
CVE-2021-25631

Source: XF
Type: UNKNOWN
libreoffice-cve202125631-code-exec(201148)

Source: MISC
Type: Exploit, Third Party Advisory
https://positive.security/blog/url-open-rce#open-libreoffice

Source: CCN
Type: LibreOffice Web site
Denylist of executable filename extensions possible to bypass under windows

Source: MISC
Type: Vendor Advisory
https://www.libreoffice.org/about-us/security/advisories/cve-2021-25631/

Vulnerable Configuration:Configuration 1:
  • cpe:/a:libreoffice:libreoffice:*:*:*:*:*:*:*:* (Version >= 7.0.0: and < 7.0.5:)
  • OR cpe:/a:libreoffice:libreoffice:*:*:*:*:*:*:*:* (Version >= 7.1.0: and < 7.1.2:)

    • Configuration CCN 1:
  • cpe:/a:libreoffice:libreoffice:7.1.1:*:*:*:*:*:*:*
  • OR cpe:/a:libreoffice:libreoffice:7.0.4:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    BACK
    libreoffice libreoffice *
    libreoffice libreoffice *
    libreoffice libreoffice 7.1.1
    libreoffice libreoffice 7.0.4