CVE-2021-25636

CVSS V2 Medium 5 CVSS V3 High 7.5
Description
LibreOffice supports digital signatures of ODF documents and macros within documents, presenting visual aids that no alteration of the document occurred since the last signing and that the signature is valid. An Improper Certificate Validation vulnerability in LibreOffice allowed an attacker to create a digitally signed ODF document, by manipulating the documentsignatures.xml or macrosignatures.xml stream within the document to contain both "X509Data" and "KeyValue" children of the "KeyInfo" tag, which when opened caused LibreOffice to verify using the "KeyValue" but to report verification with the unrelated "X509Data" value. This issue affects: The Document Foundation LibreOffice 7.2 versions prior to 7.2.5.
Overview
  • CVE ID
  • CVE-2021-25636
  • Assigner
  • security@documentfoundation.org
  • Vulnerability Status
  • Modified
  • Published Version
  • 2022-02-24T15:15:21
  • Last Modified Date
  • 2023-03-27T00:15:07
Weakness Enumerations
CWE URL
CWE-295 http://cwe.mitre.org/data/definitions/295.html
CWE-347 http://cwe.mitre.org/data/definitions/347.html
CPE Configuration (Product)
CPE Vulnerable Operator Version Start Version End
cpe:2.3:a:libreoffice:libreoffice:*:*:*:*:*:*:*:* 1 OR 7.2.0 7.2.5
cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* 1 OR
CVSS Version 2
  • Version
  • 2.0
  • Vector String
  • AV:N/AC:L/Au:N/C:N/I:P/A:N
  • Access Vector
  • NETWORK
  • Access Compatibility
  • LOW
  • Authentication
  • NONE
  • Confidentiality Impact
  • NONE
  • Integrity Impact
  • PARTIAL
  • Availability Impact
  • NONE
  • Base Score
  • 5
  • Severity
  • MEDIUM
  • Exploitability Score
  • 10
  • Impact Score
  • 2.9
CVSS Version 3
  • Version
  • 3.1
  • Vector String
  • CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
  • Attack Vector
  • NETWORK
  • Attack Compatibility
  • LOW
  • Privileges Required
  • NONE
  • User Interaction
  • NONE
  • Scope
  • UNCHANGED
  • Confidentiality Impact
  • NONE
  • Availability Impact
  • NONE
  • Base Score
  • 7.5
  • Base Severity
  • HIGH
  • Exploitability Score
  • 3.9
  • Impact Score
  • 3.6
References
Reference URL Reference Tags
https://lists.debian.org/debian-lts-announce/2023/03/msg00022.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NE6UIBCPZWRBWPSEGJOPNWPPT3CCMVH2/
https://www.libreoffice.org/about-us/security/advisories/CVE-2021-25636/ Vendor Advisory
Sources
Source Name Source URL
NIST https://nvd.nist.gov/vuln/detail/CVE-2021-25636
MITRE https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-25636
History
Created Old Value New Value Data Type Notes
2022-05-10 15:47:29 Added to TrackCVE
2022-12-06 10:35:35 2022-02-24T15:15Z 2022-02-24T15:15:21 CVE Published Date updated
2022-12-06 10:35:35 2022-06-03T16:20:39 CVE Modified Date updated
2022-12-06 10:35:35 Analyzed Vulnerability Status updated
2023-03-27 15:12:38 2023-03-27T00:15:07 CVE Modified Date updated
2023-03-27 15:12:38 Analyzed Modified Vulnerability Status updated
2023-03-27 15:12:38 Weakness Enumeration update
2023-03-27 15:12:38 References updated