CVE-2021-25634

Public on

Last Modified: UTC

Description

A flaw was found in LibreOffice, where it inserted a signing timestamp. This flaw allows LibreOffice to present a valid signature due to the altered signing time. The highest threat from this vulnerability is to confidentiality and integrity.

A flaw was found in LibreOffice, where it inserted a signing timestamp. This flaw allows LibreOffice to present a valid signature due to the altered signing time. The highest threat from this vulnerability is to confidentiality and integrity.

Additional information

  • Bugzilla 2013151: libreoffice: Timestamp Manipulation with Signature Wrapping
  • CWE-295: Improper Certificate Validation
  • FAQ: Frequently asked questions about CVE-2021-25634

Common Vulnerability Scoring System (CVSS) Score Details

Important note

CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).

CVSS v3 Score Breakdown
Red HatNVD

CVSS v3 Base Score

7.1

7.5

Attack Vector

Local

Network

Attack Complexity

Low

Low

Privileges Required

None

None

User Interaction

Required

None

Scope

Unchanged

Unchanged

Confidentiality Impact

High

None

Integrity Impact

High

High

Availability Impact

None

None

CVSS v3 Vector

Red Hat: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

NVD: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Frequently Asked Questions

Why is Red Hat's CVSS v3 score or Impact different from other vendors?

My product is listed as "Under investigation" or "Affected", when will Red Hat release a fix for this vulnerability?

What can I do if my product is listed as "Will not fix"?

What can I do if my product is listed as "Fix deferred"?

What is a mitigation?

I have a Red Hat product but it is not in the above list, is it affected?

Why is my security scanner reporting my product as vulnerable to this vulnerability even though my product version is fixed or not affected?

My product is listed as "Out of Support Scope". What does this mean?

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