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TI-2021-07771 Aliases CVE-2021-25635GHSA-r73f-2rxh-prfm

Content Manipulation with Certificate Validation Attack

Priority LOW 25CWE-295Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
Passive
Attack complexity
High
Attack requirements
None
Impact type
Spoofing
Confidentiality · integrity · availability
Low · Low · None
Fix status
Partial Red Hat: 2 fixed, 3 without a fix

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-295.

Summary

An Improper Certificate Validation vulnerability in LibreOffice allowed an attacker to self sign an ODF document, with a signature untrusted by the target, then modify it to change the signature algorithm to an invalid (or unknown to LibreOffice) algorithm and LibreOffice would incorrectly present such a signature with an unknown algorithm as a valid signature issued by a trusted person This issue affects LibreOffice: from 7.0 before 7.0.5, from 7.1 before 7.1.1.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00138 3rd percentileScored 2026-11-07
Fix Partial LibreOffice (The Document Foundation): 7.0.5, 7.1.1Red Hat: 1 advisoryRed Hat: 2 fixed, 3 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
The Document FoundationLibreOffice7.0 to before 7.0.5; 7.1 to before 7.1.17.0.5, 7.1.1Patch availableCNA
  • LibreOffice VendorThe Document Foundation Affected 7.0 to before 7.0.5; 7.1 to before 7.1.1 Fixed in 7.0.5, 7.1.1 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:libreoffice:libreoffice:*:*:*:*:*:*:*:*7.0.0 to before 7.0.5.1; 7.1.0.0 – 7.1.1.1VulnerableThe Document Foundation
  • cpe:2.3:a:libreoffice:libreoffice:*:*:*:*:*:*:*:* Versions 7.0.0 to before 7.0.5.1; 7.1.0.0 – 7.1.1.1 Vulnerable ·The Document Foundation

Remediation

  • Fix · CNA LibreOffice (The Document Foundation) Fixed in 7.0.5, 7.1.1

Red Hat 1 advisory

  • RHSA-2022:1766 Released 2022-05-10 · Red Hat rating Moderate
    libreoffice security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream (v. 8) autocorr-af-1:6.4.7.2-10.el8, autocorr-bg-1:6.4.7.2-10.el8, autocorr-ca-1:6.4.7.2-10.el8 +47
    • Red Hat Enterprise Linux CRB (v. 8) libreoffice-sdk-1:6.4.7.2-10.el8, libreoffice-sdk-doc-1:6.4.7.2-10.el8

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 6AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux 7AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux 8AffectedNo fix planned: Will not fix
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2022:1766
Red Hat Enterprise Linux CRB (v. 8)Fixed RHSA-2022:1766
Not affected: 1 product
  • Red Hat Enterprise Linux 9

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-25635
  2. 2026-10-03 Alias added: GHSA-r73f-2rxh-prfm

References

Advisory 1

  • TI-2019-07233 LibreLogo global-event script execution CVSS 3.1CRITICAL 9.8
  • TI-2018-12068 Path traversal in [UNKNOWN] libreoffice CVSS 3.0CRITICAL 9.8
  • TI-2018-07474 An information disclosure vulnerability occurs when LibreOffice 6.0.3 and Apache… CVSS 3.0HIGH 7.5
  • TI-2019-07230 Code injection in Document Foundation LibreOffice CVSS 3.1CRITICAL 9.8
  • TI-2018-05018 LibreOffice before 5.4.5 and 6.x before 6.0.1 allows remote attackers to read arbitrary… CVSS 3.0CRITICAL 9.8
  • TI-2023-01118 Arbitrary file write in libreoffice CVSS 3.1MEDIUM 5.5
See all 70 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences