CVE-2021-25636: fedoraproject fedora
Vulnerability summary
CVE-2021-25636 is a high (CVSS 7.5) vulnerability in fedoraproject fedora. EPSS estimates a 0.95% chance of exploitation in the next 30 days, higher than 60.7% of scored vulnerabilities.
Advisory lineage
Upstream 0 · Downstream 1Timeline
- 22-02-2022PublishedVulnerability first disclosed.
- 03-08-2024Last modifiedVulnerability information updated.
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.
CVSS metrics
5 scores · 4 sources · 2 versions- OSV · Red hatEcosystem advisory · calculated6.2MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:NDiffers
- OSV · UbuntuEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
- OSV · DebianEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
EPSS trend
Probability
0.95%
Chance of exploitation in the next 30 days
Percentile
61%
Versus all other CVEs
30-day change
0.00 pp
From 0.95% on 19-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Redhat191 products
- autocorr-af< 1:6.4.7.2-11.el8
- autocorr-bg< 1:6.4.7.2-11.el8
- autocorr-ca< 1:6.4.7.2-11.el8
- autocorr-cs< 1:6.4.7.2-11.el8
- autocorr-da< 1:6.4.7.2-11.el8
Suse4 products
- libreoffice&distro=SUSE Linux Enterprise Module for Package Hub 15 SP3< 7.2.5.1-150300.14.22.18.3
- libreoffice&distro=SUSE Linux Enterprise Software Development Kit 12 SP5< 7.2.5.1-48.19.4
- libreoffice&distro=SUSE Linux Enterprise Workstation Extension 12 SP5< 7.2.5.1-48.19.4
- libreoffice&distro=SUSE Linux Enterprise Workstation Extension 15 SP3< 7.2.5.1-150300.14.22.18.3
Debian1 product
- libreoffice< 1:7.3.0-1
Fedoraproject1 product
- fedoraEOL34
Libreoffice1 product
- libreoffice≥ 7.2.0, < 7.2.5
Opensuse1 product
- libreoffice&distro=openSUSE Leap 15.3< 7.2.5.1-150300.14.22.18.3
Ubuntu1 product
- libreoffice< 1:6.0.7-0ubuntu0.18.04.11 | < 1:6.4.7-0ubuntu0.20.04.4
7 vendors · 200 products · Showing 200 of 201. Use Open JSON for the complete list.
References
21 links- lists.fedoraproject.org/archives/…Vendor Advisory
Show all 21 references
- lists.opensuse.org/archives/…Advisory