Vulnerability Name: | CVE-2021-25636 (CCN-222255) | ||||||||||||||||||||||||||||||||||||||||
Assigned: | 2021-01-19 | ||||||||||||||||||||||||||||||||||||||||
Published: | 2022-02-22 | ||||||||||||||||||||||||||||||||||||||||
Updated: | 2023-03-27 | ||||||||||||||||||||||||||||||||||||||||
Summary: | 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 v3 Severity: | 7.5 High (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N) 6.5 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C)
6.5 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C)
5.4 Medium (REDHAT Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C)
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CVSS v2 Severity: | 5.0 Medium (CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:P/A:N)
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Vulnerability Type: | CWE-295 | ||||||||||||||||||||||||||||||||||||||||
Vulnerability Consequences: | Bypass Security | ||||||||||||||||||||||||||||||||||||||||
References: | Source: MITRE Type: CNA CVE-2021-25636 Source: XF Type: UNKNOWN libreoffice-cve202125636-sec-bypass(222255) Source: security@documentfoundation.org Type: UNKNOWN security@documentfoundation.org Source: security@documentfoundation.org Type: UNKNOWN security@documentfoundation.org Source: CCN Type: LibreOffice Web site Incorrect trust validation of signature with ambiguous KeyInfo children Source: security@documentfoundation.org Type: Vendor Advisory security@documentfoundation.org Source: CCN Type: WhiteSource Vulnerability Database CVE-2021-25636 | ||||||||||||||||||||||||||||||||||||||||
Vulnerable Configuration: | Configuration RedHat 1:![]() | ||||||||||||||||||||||||||||||||||||||||
Oval Definitions | |||||||||||||||||||||||||||||||||||||||||
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